湖南省水稻土有机碳剖面分布特征及影响因素
作者：
沈璇玚;段良霞;欧阳宁相;盛浩;袁红;...
期刊：
土壤通报 ,2024年55(1):84-92 ISSN：0564-3945
作者机构：
湖南农业大学资源环境学院,湖南长沙 410000;湖南财政经济学院工程管理学院,湖南长沙 410000;[袁红; 沈璇玚; 周清; 张亮; 段良霞; 张扬珠; 谢红霞; 盛浩] 湖南农业大学;[欧阳宁相] 湖南财政经济学院
关键词：
土壤有机碳;发生层;成土母质;质地;地理探测器
摘要：
【目的】按土壤剖面发生层分析水稻土有机碳剖面分布特征及其影响因素。【方法】通过测定湖南省58个水稻土剖面各发生层土壤有机碳含量,分析水稻土剖面有机碳分布特征,并利用地理探测器解析水稻土有机碳含量空间分异的影响因素。【结果...展开更多 【目的】按土壤剖面发生层分析水稻土有机碳剖面分布特征及其影响因素。【方法】通过测定湖南省58个水稻土剖面各发生层土壤有机碳含量,分析水稻土剖面有机碳分布特征,并利用地理探测器解析水稻土有机碳含量空间分异的影响因素。【结果】①湖南省水稻土剖面土壤有机碳平均含量为9.30 g kg−1,其在发生层上的分布表现为耕作层(22.94 g kg−1)>犁底层(15.09 g kg−1)>底土层(6.93 g kg−1)。②不同成土母质发育的土壤中,石灰岩风化物发育的水稻土发生层有机碳含量最大;不同质地的土壤中,水稻土各类发生层有机碳含量整体上表现为随粉粒含量的增加而增大。③各发生层有机碳空间分布均呈现西南高,东北低的格局。④地理探测器结果显示,容重对各发生层水稻土有机碳含量空间分异解释程度最高,且与其他因子交互之后解释力显著增强。【结论】湖南省水稻土有机碳含量在不同剖面发生层存在显著性差异,其空间分布是由多因子交互作用形成的,容重对各发生层有机碳解释力最高。收起
语种：
中文
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Digital mapping of cultivated land soil organic matter in hill-mountain and plain regions
作者：
Xie, Hongxia;Li, Weiyou;Duan, Liangxia;Yuan, Hong;Zhou, Qing* ;...
期刊：
Journal of Soils and Sediments ,2024年24(1):349-360 ISSN：1439-0108
通讯作者：
Zhou, Qing;Du, HH
作者机构：
[Xie, Hongxia; Zhou, Qing; Du, HH; Zhou, Q; Yuan, Hong; Li, Weiyou; Luo, Zhe; Du, Huihui; Duan, Liangxia] Hunan Agr Univ, Coll Resources & Environm, Changsha 410127, Peoples R China.;[Luo, Zhe] Dept Agr & Rural Affairs Hunan Prov, Soil & Fertilizer Workstn, Changsha 410127, Peoples R China.
通讯机构：
[Du, HH ; Zhou, Q] H;Hunan Agr Univ, Coll Resources & Environm, Changsha 410127, Peoples R China.
关键词：
accuracy assessment;digital mapping;mountain region;optimization;prediction;sampling;soil organic matter;spatial analysis;China
摘要：
Purpose: Spatial prediction of soil organic matter (SOM) in cultivated land is crucial for evaluating soil productivity and its role in terrestrial carbon cycling. Cultivated soils in mountainous regions are commonly scattered on the footslope whereas those in the plain regions are continuously planar distributed; hence, they are quite different in the degree of variation in soil-forming factors and thereby the soil properties including SOM. Materials and methods: In this study, we used the digital soil mapping approach (DSM) to predict SOM (0–20cm) in cultivated soils in a hill-mountain region, Longshan County (LS), and a plain-platform region, Nanxian County (NX), which are both located at the same latitude in Southern China. By using 6746 and 9571 soil sampling points for LS and NX, respectively, together with 33 environmental covariates, the optimal spatial interpolation models and the reasonable sample strategy were carefully discussed. Results and discussion: Descriptive statistical results showed that SOM in LS and NX were both moderate variations (coefficient variation, 0.34) and were approximately normal distribution. SOM in NX was strongly spatially dependent while SOM in LS was a moderate spatial dependence. The conditional Latin hypercube sampling (cLHS) was more appropriate compared with the Simple Random Sampling (SRS) as the sampling strategy. The optimal model for predicting cultivated land SOM was the Random Forest (RF) model for both LS and NX. The prediction accuracy was positively correlated with the sampling density. Specifically, to obtain a high prediction accuracy, the reasonable sampling density for SOM in LS should be controlled at ≥ 4.0 per km2, higher than that in NX (≥ 2.0 per km2). Conclusions: The combination of cLHS and the RF model probably is the best choice for cultivated land SOM spatial prediction in different terrains. Therefore, our results provide a basis for future DSM of SOM in similar regions and help optimize soil sampling density. © 2023, The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.
语种：
英文
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基于马氏距离和最小生成树的土壤有机质含量高光谱估测
作者：
何少芳;周清;周丽
期刊：
土壤通报 ,2023年54(04):788-799 ISSN：0564-3945
作者机构：
[何少芳; 周丽] 湖南农业大学信息与智能科学技术学院;[周清] 湖南农业大学资源环境学院
关键词：
土壤高光谱;土壤有机质;马氏距离;最小生成树
摘要：
【目的】以长沙及周边区域水田土壤为研究对象，从特征空间和样本空间角度优化建模数据集，以提升基于土壤高光谱数据估测有机质含量模型的精度。【方法】利用马氏距离（MD）优化土壤光谱特征空间、最小生成树（MST）分割样本数据集优化建模样本空间，结合交叉验证岭回归（RidgeCV）和支持向量机回归（SVR）构建土壤高光谱有机质含量估测模型。【结果】在测试集上，光谱优化建模方法 MD-RidgeCV和MD-SVR的模型决定系数（R~2）分别为0.876、和0.84，样本优化建模方法 MST-RidgeCV和MST-SVR的R~2指标分别为0.847和0.815，而两种优化方法相结合的MDMST-RidgeCV和MST-MD-RidgeCV模型R~2指标均高达0.9；对比基于原始数据集和建模集优化KS和SPXY方法的土壤有机质含量估测模型，提出的方法在测试集上具有更佳的模型预测性能。【结论】利用马氏距离和最小生成树，从光谱特征空间和样本空间优化建模数据集，并结合回归算法RidgeCV和SVR构建土壤有机质含量高光谱预测模型，能显著提高模型精度和稳定性。
语种：
中文
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湖南省四水流域近60a输沙变化特征及其归因分析
作者：
谢红霞;刘雨洁;隋兵;周清;段良霞;...
期刊：
长江流域资源与环境 ,2023年32(10):2124-2136 ISSN：1004-8227
作者机构：
湖南农业大学资源环境学院,湖南长沙 410128;气象防灾减灾湖南省重点实验室,湖南长沙 410118;[刘雨洁; 朱星龙; 周清; 段良霞; 谢红霞] 湖南农业大学;[隋兵] 气象防灾减灾湖南省重点实验室
关键词：
输沙;降雨;径流;四水流域;人类活动
摘要：
为了解湖南省湘、资、沅、澧四水流域近60 a输沙变化特征及其对降雨、径流和人类活动变化的响应，对四个流域降雨量、径流量和输沙量进行了趋势、突变及周期性分析，并量化了气候变化和人类活动对输沙量变化的相对贡献率。结果表明：（1）4个流域年降雨量、暴雨量及径流量（澧水除外）均呈上升趋势，而输沙量均呈显著下降趋势；（2）各流域内降雨量、径流量和输沙量年代间的变化趋势较为一致，但变化幅度不相同；（3）4个流域降雨量和径流量均未发生显著突变，但湘江和资江流域、沅江和澧水流域输沙量分别在1998与1994年发生减少的显著突变；（4）湘江流域降雨量和输沙量的第1主周期与径流量的第2主周期一致，为53～55 a;资江和沅江流域径流量和输沙量的第1主周期为35～36 a,与降雨量的第2主周期43 a接近；澧水流域降雨量和径流量的第1主周期与输沙量的第3主周期一致，为53～55 a;（5）在基准期，4个流域的降雨量、径流量和输沙量存在协同趋势，而在变化期，降雨、径流和人类活动的共同作用下输沙量较基准期显著减少，趋势协同性逐渐异化，人类活动是四水流域输沙减少的主要因素。大坝建设和水土保持措施的配置能在一定程度上调节流域输沙量，人类通过合理调控能在一定程度上开发利用自然资源、发展社会经济及改善生态环境。
语种：
中文
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Inter-annual reduction in rice Cd and its eco-environmental controls in 6-year biannual mineral amendment in subtropical double-rice cropping ecosystems
作者：
Yin, Zerun;Sheng, Hao* ;Xiao, Huacui;Xue, Yi;Man, Zhiyong;...
期刊：
Environmental Pollution ,2022年293:118566 ISSN：0269-7491
通讯作者：
Sheng, Hao
作者机构：
[Zhou, Qing; Yin, Zerun; Xiao, Huacui; Xue, Yi; Huang, Dezhi; Sheng, Hao; Man, Zhiyong] Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Peoples R China.;[Sheng, Hao] 1 Nongdalu Rd, Changsha 410128, Hunan, Peoples R China.
通讯机构：
[Sheng, Hao] 1;1 Nongdalu Rd, Changsha 410128, Hunan, Peoples R China.
关键词：
Cd contamination;Cd immobilization;Paddy soil;Phytoavailability;Prediction model of rice Cd;pH
摘要：
The alkaline mineral amendment is a practical means of alleviating Cd concentration in rice grain (CdR) in the short-term; however, the long-term remediation effect of mineral amendment on the CdR and the eco-environmental controls remains unknown. Here a mineral (Si–Ca–Mg) amendment, calcined primarily from molybdenum tailings and dolomite, was applied biannually over 6 years (12 seasons) to acidic and moderately Cd-contaminated double-rice cropping ecosystems. This study investigated the inter-annual variation of Cd in the rice-soil ecosystem and the eco-environmental controls in subtropical rice ecosystems. CdR was reduced by 50%–86% following mineral amendment. The within-year reduction in CdR was similar between early rice (50%–86%, mean of 68%) and late rice (68%–85%, mean of 74%), leading to CdR in all early rice and in 83% of late rice samples below the upper limit (0.2 mg kg−1) of the China National Food Safety Standards. In contrast, the inter-annual reduction in CdR was moderately variable, showing a greater CdR reduction in the later 3 years (73%–86%) than in the former 3 years (54%–79%). Three years continuous mineral amendment was required to guarantee the safety rice production. The concentrations of DTPA-extractable and exchangeable Cd fractions in soil were reduced, while the concentration of oxides-bound Cd was increased. In addition, the soil pH, concentrations of Olsen-P and exchangeable Ca and Mg were elevated. These imply a lower apparent phytoavailability of Cd in the soil following mineral amendment. An empirical model of the 3-variable using soil DTPA-Cd, soil Olsen-P, and a climatic factor (precipitation) effectively predicted temporal changes in CdR. Our study demonstrates that Cd phytoavailability in soil (indexed by DTPA-extractable Cd) and climatic factors (e.g., temperature and precipitation) may directly/indirectly control the inter-annual reduction in CdR following mineral amendment in slightly and moderately Cd-contaminated paddy ecosystems. © 2021 Elsevier Ltd
语种：
英文
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亚热带山区红壤可蚀性对土地利用变化的响应
作者：
张高玲;谢红霞;盛浩;周清;段良霞;...
期刊：
长江科学院院报 ,2022年39(2):63-69 ISSN：1001-5485
作者机构：
[张高玲; 谢红霞; 盛浩; 周清; 段良霞; 吴燕语] 湖南农业大学资源环境学院
关键词：
土地利用变化;亚热带山区;红壤;土壤可蚀性;土壤理化性质
摘要：
为探究土地利用方式变化对表层土壤可蚀性的影响，本研究分别在湖南省湘东大围山和湘西小溪国家级自然保护区选取现有四种典型土地利用方式（天然林及由其转变而来且紧邻的杉木林、果园和坡改梯耕地），分析土地利用方式发生转变后表层土壤理化性质差异，选择Torri.D模型计算土壤可蚀性K值，利用系统聚类法对本研究采样点和江西鹰潭中国科学院红壤生态试验站不同研究小区的土壤理化性质进行聚类分析，并以实测数据对本研究计算的K值进行校正。结果表明：（1）湘东和湘西地区天然林转变为杉木林、果园和坡改梯耕地后表层土壤砂粒含量较本地区天然林增加，土壤机械组成呈粗骨化趋势。（2）湘西地区各土地利用方式的表层土壤有机碳含量均高于湘东地区同类型土地利用方式，且土地利用方式由天然林发生转变后，其他土地利用类型表层土壤有机碳含量均小于本地区天然林。（3）湘东地区天然林及其开垦7年后不同土地利用方式土壤可蚀性K值表现为：杉木林＞天然林＞果园（坡改梯）＞坡改梯耕地；湘西地区天然林及其开垦10年以上不同土地利用方式的土壤可蚀性K值表现为：坡改梯耕地＞果园＞杉木林＞天然林。土地利用方式发生变化后，土壤可蚀性因微地形的改变以及种植作物的年限不同会发生不同程度的变化，采取水土保持措施对土壤状况有一定改善。
语种：
中文
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Significant loss of soil inorganic carbon at the continental scale
作者：
Song, Xiao-Dong;Yang, Fei;Wu, Hua-Yong;Zhang, Jing;Li, De-Cheng;...
期刊：
国家科学评论(英文) ,2022年9(2) ISSN：2095-5138
作者机构：
[Zhang, Jing; Li, De-Cheng; Yang, Jin-Ling; Zhang, Gan-Lin; Song, Xiao-Dong; Liu, Feng; Wu, Hua-Yong; Ju, Bing; Yang, Fei; Zhao, Yu-Guo; Huang, Biao] Chinese Acad Sci, State Key Lab Soil & Sustainable Agr, Inst Soil Sci, Nanjing 210008, Peoples R China.;[Zhang, Jing; Yang, Jin-Ling; Zhang, Gan-Lin; Zhao, Yu-Guo] Univ Chinese Acad Sci, Coll Adv Agr Sci, Beijing 100049, Peoples R China.;[Wang, Tian-Wei; Chen, Jia-Ying; Cai, Chong-Fa] Huazhong Agr Univ, Coll Resources & Environm, Wuhan 430070, Peoples R China.;[Chen, Yin-Jun; Long, Huai-Yu] Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Beijing 100081, Peoples R China.;[Lu, Ying] South China Agr Univ, Coll Nat Resources & Environm, Guangzhou 510642, Peoples R China.
关键词：
China;soil inorganic carbon stocks;global change;carbonate;soil acidification
摘要：
Widespread soil acidification due to atmospheric acid deposition and agricultural fertilization may greatly accelerate soil carbonate dissolution and CO2 release. However, to date, few studies have addressed these processes. Here, we use meta-analysis and nationwide-survey datasets to investigate changes in soil inorganic carbon (SIC) stocks in China. We observe an overall decrease in SIC stocks in topsoil (0-30 cm) (11.33 g C m(-2) yr(-1)) from the 1980s to the 2010s. Total SIC stocks have decreased by similar to 8.99 +/- 2.24% (1.37 +/- 0.37 Pg C). The average SIC losses across China (0.046 Pg C yr(-1)) and in cropland (0.016 Pg C yr(-1)) account for similar to 17.6%-24.0% of the terrestrial C sink and 57.1% of the soil organic carbon sink in cropland, respectively. Nitrogen deposition and climate change have profound influences on SIC cycling. We estimate that similar to 19.12%-19.47% of SIC stocks will be further lost by 2100. The consumption of SIC may offset a large portion of global efforts aimed at ecosystem carbon sequestration, which emphasizes the importance of achieving a better understanding of the indirect coupling mechanisms of nitrogen and carbon cycling and of effective countermeasures to minimize SIC loss. Significant loss of soil inorganic carbon forced by the input and transformation of anthropogenic reactive nitrogen at the continental scale offsets much of carbon sequestration in the terrestrial ecosystems.
语种：
英文
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基于条件拉丁超立方抽样的县域耕地土壤有机质空间插值合理样本密度的确定
作者：
李维友;段良霞;谢红霞;胡碧峰;周清;...
期刊：
土壤通报 ,2022年53(3):505-513 ISSN：0564-3945
作者机构：
[罗喆] 湖南农业大学资源环境学院,湖南 长沙 410000;江西财经大学旅游与城市管理学院,江西 南昌 330013;[罗喆] 湖南省土壤肥料工作站,湖南 长沙 410000;[周清; 段良霞; 李维友; 谢红霞] 湖南农业大学;[胡碧峰] 江西财经大学
关键词：
土壤有机质;条件拉丁超立方抽样;普通克里格;空间预测;合理样本密度
摘要：
【目的】采样密度与耕地土壤有机质(SOM)的空间预测精度密切相关,为提高耕地SOM空间预测精度,需要确定合理的采样密度。【方法】以湖南省岳阳县为例,用R语言设计了条件拉丁超立方体抽样(cLHS)方案,从7399个(采样密度为14.82个km~(-2))耕地土壤样本中独立抽取不同采样密度的8个训练集(采样密度分别为10.01、7.41、 3.70、1.85、0.93、0.46、0.23、0.12个km~(-2)),为了兼顾样本特征空间与地理空间,地形部位、坡度、成土母质、土壤类型、乡镇和经纬度等信息被添加到了cLHS中。结合普通克里格方法,分析和探讨了不同采样密度的耕地SOM空间预测效果。【结果】不同采样密度训练集SOM均值高于湖南省平均水平,具有中等程度变异,描述性统计结果差异不大,各训练集对总体均具有较强的代表性;半方差函数模型均为指数模型,具有较好的半方差结构(结构性比例: 87.5% ~ 94.5%),空间相关性较强,变程与拟合优度呈现出正相关关系(相关系数r = 0.96),与结构性比例则表现为负相关关系(相关系数r = -0.79);在采样密度为3.70个km~(-2)时,探测到的SOM变异结构中结构性组分最完整,精度最佳。当采样密度达到1.85个km~(-2)以上时可较稳健地揭示其空间结构特征,继续增加采样密度并不能大幅提升预测精度。 【结论】考虑预测精度要求和工作成本,与研究区自然地理条件相似的地区将耕地土壤采样密度控制在1.85个km~(-2)以上可获得预期的效果。
语种：
中文
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Land use conversion and lithology impacts soil aggregate stability in subtropical China
作者：
Duan, Liangxia;Sheng, Hao;Yuan, Hong;Zhou, Qing;Li, Zhenwei*
期刊：
Geoderma ,2021年389:114953 ISSN：0016-7061
通讯作者：
Li, Zhenwei
作者机构：
[Zhou, Qing; Yuan, Hong; Sheng, Hao; Duan, Liangxia] Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Peoples R China.;[Li, Zhenwei] Chinese Acad Sci, Inst Subtrop Agr, Key Lab Agroecol Proc Subtrop Reg, Changsha 410125, Peoples R China.
通讯机构：
[Li, Zhenwei] C;Chinese Acad Sci, Inst Subtrop Agr, Key Lab Agroecol Proc Subtrop Reg, Changsha 410125, Peoples R China.
关键词：
Granite;Le Bissonnais' method;Slate;Soil erosion;Yoder's method
摘要：
Soil aggregate stability is one of the most important indicators of soil structure and soil degradation vulnerability, and it is the dominant factor controlling hillslope soil erosion in the subtropical Ultisols region of China. However, few studies have investigated the synergistic effects of land use conversion and lithology on soil aggregate stability, especially in subtropical Ultisols region of China where soil erosion is a serious concern. Soil samples from 0 to 100 cm depth at increments of 20 cm were collected from four typical land use types (natural forest, artificial forest, orchard, and cropland) and two lithologies (granite and slate) to determine soil aggregate stability using the Le Bissonnais' and Yoder' methods on Ultisols from subtropical China. Results indicated that both land use type and lithology significantly influenced the soil aggregate stability. Specifically, in different soil depths of 0–100 cm, land use changes from natural forest to orchard and cropland significantly decreased the aggregate stability, thus increasing soil erodibility. Following the conversion of natural forest to artificial forest generally enhanced soil stability and resistance to flowing water erosion. For lithology, the slate soil was more resistant to erosion than granite soil. The generalized linear model can explain >60% of the total variation in soil aggregate stability, and the effect of land use on aggregate stability was greater than lithology. Compared with the Yoder' wet-sieving method, the Le Bissonnais method was better at characterizing soil aggregate stability among land uses and lithology, and therefore should be considered as a preferred method in future studies in the subtropical Ultisols region of China. © 2021 Elsevier B.V.
语种：
英文
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湖南蒸水流域近20年土壤侵蚀时空变化
作者：
王海涛;谢红霞;杨勤科;周清;段良霞
期刊：
中国水土保持科学(中英文) ,2021年19(02):33-42 ISSN：2096-2673
作者机构：
[王海涛; 段良霞; 谢红霞; 周清] 湖南农业大学资源环境学院;[杨勤科] 西北大学
关键词：
时空变化;土壤侵蚀;定量评价;中国土壤流失方程(CSLE);蒸水流域
摘要：
为了解南方红壤丘陵区的土壤侵蚀时空变化特征,利用研究区及周边多个气象站1961-2018年的日降雨数据、多期土地利用数据、DEM数据、遥感影像等,采用空间插值等方法,获得蒸水流域1995、2000、2005、2010和2015年5个年度土壤侵蚀影响因子图,利用CSLE模型定量估算5个年度流域的土壤侵蚀量,根据水利部土壤侵蚀分类分级标准确定蒸水流域的土壤侵蚀等级分布情况,分析近20年来的土壤侵蚀的时空变化特征。结果表明: 1)流域内降雨侵蚀力因子R年均值介于4 275至5 934 MJ·mm/(hm~2·h·a)之间,具有较高的空间异质性,土壤可蚀性因子K均值为0.004 333 t·hm~2·h/(hm~2·MJ·mm),坡长坡度因子LS均值为4.45,植被覆盖与生物措施因子B年均值介于0.445 6至0.451 1之间,工程措施因子E年均值介于0.710 9至0.714 3之间,耕作措施因子T年均值介于0.705 6至0.709 5之间; 2)蒸水流域5个年度的年均土壤侵蚀模数分别为412、520、479、530和528 t/(km2·a),年际差异显著,呈波动变化,5个年度的平均侵蚀模数为494 t/(km2·a),属于微度侵蚀等级; 3)流域主要用地类型的土壤侵蚀情况为旱地>有林地>疏林地>水田; 4)研究时段内,侵蚀性降雨变化是蒸水流域近20年时空变化最主要的驱动因素; 5)流域水文站神山头站控制范围内侵蚀计算结果远大于实测输沙量,输沙量逐年降低,泥沙输移比逐年下降; 6)土壤侵蚀模数空间差异较大,衡阳县、邵东县、衡南县,是未来水土保持的重点地区。
语种：
中文
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湖南省县域经济发展和城镇化水平时空变化研究
作者：
谢红霞;尹懋森;周清;刘沛;徐宁
期刊：
中国农业资源与区划 ,2021年42(04):171-178 ISSN：1005-9121
作者机构：
湖南农业大学资源环境学院,长沙 410128;[刘沛; 尹懋森; 周清; 谢红霞; 徐宁] 湖南农业大学
关键词：
产业产值;城镇化;变异系数;热点分析;相关性分析
摘要：
[目的]利用湖南省各县级单元15年来三次产业产值和城镇化率数据,通过分析以掌握全省县域经济发展和城镇化水平的时空变化及两者的相关性。[方法]文章运用变异系数、热点分析和相关系数等方法,计算各县级单元相关指标,利用ArcGIS10.2对其空间格局进行分析。[结果]（1） 15年来全省三次产业产值县域间相对差异表现为第三产业最大,第二产业次之,第一产业最小;（2） 15年来湖南省二三次产业产值均呈现东部高西部低的特点,全省总体格局变化不大,第一产业则表现为东北部、中部高,西部和南部低的特点;（3） 15年来城镇化水平热点主要位于各市辖区和经济发展水平较高的县级市,全省二三产业产值与城镇化水平的相关程度较高,且第二产业与城镇化水平的相关性最强。[结论]湖南省经济发展水平和城镇化水平的县域间差异正逐步缩小,正逐步形成以长株潭地区为热点中心,岳阳、常德为次热点中心的工业化阶段的区域空间结构,湖南省可以考虑以长株潭热点区和岳阳、常德次热点区为抓手,通过适当政策倾斜带动冷点区域发展,促进区域经济与城镇化协调发展。
语种：
中文
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Clay mineral composition of upland soils and its implication for pedogenesis and soil taxonomy in subtropical China
作者：
Ouyang, Ningxiang;Zhang, Yangzhu* ;Sheng, Hao;Zhou, Qing;Huang, Yunxiang;...
期刊：
Scientific Reports ,2021年11(1):9707 ISSN：2045-2322
通讯作者：
Zhang, Yangzhu
作者机构：
[Zhou, Qing; Ouyang, Ningxiang; Sheng, Hao; Huang, Yunxiang; Zhang, Yangzhu; Yu, Zhan] Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Peoples R China.
通讯机构：
[Zhang, Yangzhu] C;College of Resources and Environment, Hunan Agricultural University, Changsha, 410128, China.
摘要：
<jats:title>Abstract</jats:title><jats:p>Clay minerals are intermediate products generated during soil development, and their neoformation and transformation are closely related to pedogenesis. Here we aimed at identifying the difference in the clay mineral composition of upland soils derived from different parent materials and different soil-forming environments and exploring the importance of clay mineral composition in pedogenesis and soil taxonomy. We sampled 60 soil B horizons in Hunan Province of subtropical China by digging soils derived from granite (GR), slate and shale (SS), Quaternary red clay (QRC), limestone (LS), and sandstone (SDS). The clay mineral composition and its correlation with parent materials, elevation, micro-topography, and pedogenic processes were investigated using X-ray diffraction and Pearson’s correlation analysis. The clay mineral was dominated by kaolinite, followed by 2:1-type minerals (illite and vermiculite), and a small fraction of mixed-layer minerals. The composition of soil clay minerals varied with parent materials. Kaolinite was predominant in soils derived from GR and LS; mixed-layer minerals prevailed in QRC, whereas illite and vermiculite were prevalent in SDS. In addition, elevation and micro-climate could also explain the variations in clay mineral composition. Increase in elevation was associated with decreased 1:1 clay mineral content and increased 2:1 clay mineral content, especially in soils developed from LS. The composition and content of clay minerals indicated that Ferrosols, Ultisols, and Acrisols had undergone intense weathering; Primosols, Entisols, and Leptosols were characterised by weak weathering, and Plinthic Ali-Udic Cambosols, Plinthudults, and Plinthosols were characterised by strong redox status. This study suggests that clay mineral composition is related to the parent material, climate, and micro-topography, and that it can serve as an indicator of pedogenesis and soil type in subtropical China.</jats:p>
语种：
英文
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中国南方富铁铝化土壤土系建立进展
作者：
欧阳宁相;张杨珠;盛浩;周清
期刊：
土壤 ,2021年53(05):907-915 ISSN：0253-9829
作者机构：
湖南农业大学资源环境学院,长沙 410128;[欧阳宁相; 周清; 盛浩; 张杨珠] 湖南农业大学
关键词：
富铁铝化土壤;中国土壤系统分类;土系建立
摘要：
土壤基层分类单元划分,特别是土系建立是土壤系统分类的基础,也能直接为农业生产提供更详细的科学指导。富铁铝化土壤(砖红壤、赤红壤和红壤)在我国南方广泛分布,为了解其在中国土壤系统分类中的归属以及土系建立情况,本文综述了自2008年以来土系研究的相关成果,系统分析了富铁铝化土壤诊断层和诊断特性检索、高级分类单元归属以及基层分类单元建立现状,并展望了土系建立的发展方向:进一步细化土系划分和描述标准,加强新土系建立,加强新技术和新方法在土系建立中的应用,加大和扩展土系建立成果的运用,以为我国南方富铁铝化土壤系统分类研究提供参考。
语种：
中文
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湖南省县域经济差异及影响因素探测分析
作者：
徐宁;谢红霞;周清;袁红;杨君;...
期刊：
湖南农业科学 ,2021年(10):87-93 ISSN：1006-060X
作者机构：
[袁红; 谢红霞; 李维友; 周清; 杨君] 湖南农业大学资源环境学院;陕西师范大学地理科学与旅游学院;[徐宁] 湖南农业大学资源环境学院<&wdkj&>陕西师范大学地理科学与旅游学院
关键词：
县域经济;差异;三次产业;地理探测器;湖南
摘要：
采用空间自相关分析、地理探测器等研究方法,利用湖南省各县（市、区）近15 a的三次产业人均产值和相关影响因素数据,分析了县域间经济的整体差异、不同产业人均产值的集聚程度,并找出影响产业经济差异的主要因素。结果表明:2003—2017年间三次产业人均产值县域间差异表现为第二产业最大,第三产业次之,第一产业最小,变异系数均值分别为1.04、0.97和0.37,且各产业人均产值县域间差异有缩小的趋势;县域产业经济发展水平空间自相关性具有显著特征,显著性表现为第二产业最强,第一产业次之,第三产业最弱,全局Morans’I均值分别为0.47、0.33和0.23;第二产业人均产值县域空间集聚呈增强的趋势,全局Morans’I由0.41增加到0.54,而第一三产业人均产值县域集聚程度有一定减弱,全局Morans’I分别由0.31、0.33减少到0.28、0.25;地理探测结果显示,影响县域间第一产业发展差异的主导因素由政府干预变为城镇化水平,影响第二产业发展差异的主导因素是产业支撑,影响第三产业发展差异的主导因素是市场规模。
语种：
中文
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Large-scale spatial variability of eight soil chemical properties within paddy fields
作者：
Duan, Liangxia;Li, Zhenwei;Xie, Hongxia;Li, Zhiming;Zhang, Liang;...
期刊：
CATENA ,2020年188:104350 ISSN：0341-8162
通讯作者：
Zhou, Qing
作者机构：
[Xie, Hongxia; Zhou, Qing; Zhang, Liang; Duan, Liangxia] Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Peoples R China.;[Li, Zhenwei] Chinese Acad Sci, Inst Subtrop Agr, Key Lab Agroecol Proc Subtrop Reg, Changsha 410125, Peoples R China.;[Li, Zhiming] Hunan Stn Soil & Fertilizer, Changsha 410005, Peoples R China.
通讯机构：
[Zhou, Qing] H;Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Peoples R China.
关键词：
Geostatistics;Interpolation;Rice fields;Soil chemical properties;Spatial variation
摘要：
Rice is one of the most important crops in the world. It provides food for 40% of the world's population and 60% of China's population. Soil nutrients have a significant impact on both agriculture and the environment, particularly with regards to soil fertility, soil quality, and rice production. However, minimal research has been conducted to address spatial patterns of soil nutrients at a large scale within paddy fields. This information is crucial for improving not only soil nutrient management, but also rice yields. Soil surface samples (0–20 cm of plough depth, totalling 8890) were collected from paddy fields to determine the spatial variability of eight soil chemical properties (soil organic carbon (SOC), total nitrogen (TN), available N (AN), total phosphorus (TP), available P (AP), total potassium (TK), rapidly available K (RAK), and slowly available K (SAK)). Inverse distance weighting (IDW) and ordinary kriging methods were applied to produce a continuous soil nutrient surface. Results indicated that soil chemical properties vary substantially. Paddy fields were characterized by high mean concentrations of SOC (19.7 g kg−1), TN (1.91 g kg−1), and AN (164.7 mg kg−1), implying that no additional C and N fertilizer was needed in regions with high SOC and N. SAK and AP demonstrated moderate (36.9%) and weak (96.2%) spatial dependence, respectively, while strong spatial dependence (10.1–13.5%) was observed across the remaining six soil chemical properties. Regional distribution maps of soil chemical properties were produced and ordinary kriging methods interpolated more accurately than the IDW method. © 2019 Elsevier B.V.
语种：
英文
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Regional pattern of soil organic carbon density and it's influence upon the plough layers of cropland
作者：
Duan Liangxia;Li Zhenwei;Xie Hongxia;Yuan Hong;Li Zhiming;...
期刊：
Land Degradation & Development ,2020年31(16):2461-2474 ISSN：1085-3278
通讯作者：
Zhou Qing
作者机构：
[Zhou Qing; Duan Liangxia; Yuan Hong; Xie Hongxia] Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Peoples R China.;[Li Zhenwei] Chinese Acad Sci, Inst Subtrop Agr, Key Lab Agroecol Proc Subtrop Reg, Changsha, Peoples R China.;[Li Zhiming] Hunan Stn Soil & Fertilizer, Changsha, Peoples R China.
通讯机构：
[Zhou Qing] H;Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Peoples R China.
关键词：
cropland;geostatistics;REML;soil organic carbon density;spatial pattern
摘要：
Understanding regional spatial pattern of soil organic carbon density (SOCD) and its potential influencing factors in cropland is of paramount importance when evaluating soil quality and assess the carbon sequestration potential. However, little information is available regarding the regional SOCD for the plough layer of the cropland soils with high-density sampling sites. In this context, 14,058 soil samples were collected at a regional scale (21 × 104 km2) to investigate the spatial variation in SOCD and to identify the dominant factors influencing this variation using classical statistics, principal component analysis (PCA), residual maximum likelihood (REML), and geostatistical methods, such as semivariogram and ordinary kriging methods. The results indicated that soil organic carbon (SOC) and SOCD both demonstrated moderate variability ranging from 2.61 to 35.67 g kg−1 and 2.61 to 35.67 kg C m−2, respectively. Geostatistical analysis showed that the nugget-to-sill ratios for SOC and SOCD were 0.59 and 0.61, respectively, which demonstrated moderate spatial dependence. The PCA and a minimum data set method identified that organic nitrogen fertilizer, accumulated temperature ≥ 0°C, rice straw incorporation, precipitation, and soil pH were the major factors affecting the spatial variability in SOCD. The REML analysis showed that geomorphologic features, soil types, and irrigation conditions also exerted substantial influence on SOC and SOCD. This study provided reliable estimates of spatial variation in SOCD and thus is helpful in the formulation of strategic sustainable SOC management and regional policy decision making. © 2020 John Wiley & Sons, Ltd.
语种：
英文
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Composition of clay minerals and their pedogenetic and taxonomic implications for Stagnic Anthrosols derived from different parent materials in Hunan Province, China
作者：
Yu, Zhan;Zhang, Yangzhu* ;Sheng, Hao;Zhang, Liang;Zhou, Qing;...
期刊：
Journal of Soils and Sediments ,2020年20(3):1558-1570 ISSN：1439-0108
通讯作者：
Zhang, Yangzhu
作者机构：
[Zhou, Qing; Zhang, Liang; Sheng, Hao; Zhang, Yangzhu; Yu, Zhan] Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Hunan, Peoples R China.;[Yan, Xiong] Zunyi Normal Univ, Coll Resources & Environm, Zunyi 563006, Guizhou, Peoples R China.
通讯机构：
[Zhang, Yangzhu] H;Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Hunan, Peoples R China.
关键词：
clay mineral;kaolinite;limestone;parent material;pedogenesis;soil horizon;vermiculite;China;Hunan
摘要：
Purpose: The aims of this study were to investigate the composition of clay minerals in soils derived from different parent materials and to elucidate how parent materials and pedogenic environment affect the distribution of clay minerals and reveal the implications for pedogenetics and taxonomy in Stagnic Anthrosols. Materials and methods: Clay mineralogy and physicochemical properties of the Hydragric horizon of Stagnic Anthrosols derived from granite (GR), plate shale (PS), quaternary red clays (QRC), limestone (LS), purple sandy shale (PSS) and fluvial-lacustrine deposit (FLD) located in Hunan Province of China were analysed to explore the relationships between the conditions influencing the formation of the soil and the composition of clay minerals. Results and discussion: Results indicated that the composition of clay minerals is closely related to both parent material and type of Stagnic Anthrosols: the soils derived from GR, PS and QRC, which are mostly classified as Fe-accumulic-Stagnic Anthrosols, are dominantly 1:1 type kaolinite and vermiculite and illite/vermiculite mixed layer minerals of widespread distribution. However, soils derived from LS, PSS and FLD were mainly classified as Hapli-Stagnic Anthrosols and are mainly composed of 2:1 type illite/smectite mixed layer minerals, where chlorite is commonly found. Illite is widely distributed and its content varies the least among different parent materials. An extremely significant relationship between pH and kaolinite, chlorite and mixed layer minerals was noted, and the two kinds of mixed layer minerals showed highly significant negative correlation. Conclusions: This study revealed that the types and quantities of clay minerals in the soil are closely related to the types of parent material. This reflected better direction and degree of development in Stagnic Anthrosols, which is related to the physicochemical properties of parent material and can be used as one of the bases for the classification of soil groups and subgroups within the soil family for Stagnic Anthrosols in Chinese Soil Taxonomy. © 2019, Springer-Verlag GmbH Germany, part of Springer Nature.
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英文
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Relative Importance of Land Use and Climate Change on Hydrology in Agricultural Watershed of Southern China
作者：
Luo, Lanhua;Zhou, Qing;He, Hong S.;Duan, Liangxia;Zhang, Gaoling;...
期刊：
Sustainability ,2020年12(16):6423 ISSN：2071-1050
通讯作者：
Xie, Hongxia
作者机构：
[Zhou, Qing; Xie, Hongxia; Luo, Lanhua; Zhang, Gaoling; Duan, Liangxia] Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Peoples R China.;[Luo, Lanhua] Nanjing Normal Univ, Key Lab Virtual Geog Environm, Minist Educ, Nanjing 210023, Peoples R China.;[He, Hong S.] Univ Missouri, Sch Nat Resources, Columbia, MO 65211 USA.
通讯机构：
[Xie, Hongxia] H;Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Peoples R China.
关键词：
land use change;runoff;climate change;SWAT model
摘要：
<jats:p>Quantitative assessment of the impact of land use and climate change on hydrological processes is of great importance to water resources planning and management. The main objective of this study was to quantitatively assess the response of runoff to land use and climate change in the Zhengshui River Basin of Southern China, a heavily used agricultural basin. The Soil and Water Assessment Tool (SWAT) was used to simulate the river runoff for the Zhengshui River Basin. Specifically, a soil database was constructed based on field work and laboratory experiments as input data for the SWAT model. Following SWAT calibration, simulated results were compared with observed runoff data for the period 2006 to 2013. The Nash-Sutcliffe Efficiency Coefficient (NSE) and the correlation coefficient (R2) for the comparisons were greater than 0.80, indicating close agreement. The calibrated models were applied to simulate monthly runoff in 1990 and 2010 for four scenarios with different land use and climate conditions. Climate change played a dominant role affecting runoff of this basin, with climate change decreasing simulated runoff by −100.22% in 2010 compared to that of 1990, land use change increasing runoff in this basin by 0.20% and the combination of climate change and land use change decreasing runoff by 60.8m3/s. The decrease of forestland area and the corresponding increase of developed land and cultivated land area led to the small increase in runoff associated with land use change. The influence of precipitation on runoff was greater than temperature. The soil database used to model runoff with the SWAT model for the basin was constructed using a combination of field investigation and laboratory experiments, and simulations of runoff based on that new soil database more closely matched observations of runoff than simulations based on the generic Harmonized World Soil Database (HWSD). This study may provide an important reference to guide management decisions for this and similar watersheds.</jats:p>
语种：
英文
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基于GIS的降雨空间插值研究———以湖南省为例
作者：
阳宽达;谢红霞;隋兵;周清;刘沛;...
期刊：
水土保持研究 ,2020年27(03):134-138,145 ISSN：1005-3409
作者机构：
湖南农业大学资源环境学院,长沙410128;中南大学地球科学与信息物理学院,长沙410083;气象防灾减灾湖南省重点实验室,长沙410007;[刘沛; 阳宽达; 周清; 王海涛; 谢红霞] 湖南农业大学;[隋兵] 气象防灾减灾湖南省重点实验室
关键词：
普通克里金插值;协同克里金插值;降雨;插值精度
摘要：
降水数据是区域水文模拟、水资源分析和管理及地质灾害预警等方面的基础数据,提高降雨数据的插值精度具有重要的理论和现实意义。以湖南省为研究区,结合站点观测降雨数据、TRMM雷达降雨数据及DEM数据,采用克里金插值和协同克里金插值两种方法进行了降雨插值,通过对比研究降雨插值精度。结果表明:(1)引入与降雨空间信息相关的TRMM,DEM数据的协同克里金插值能够提高插值精度,以TRMM,DEM为辅助变量的协同克里金插值的平均相对误差较克里金插值降低了0.02%,0.23%;(2)降雨观测数据插值结果对于TRMM,DEM这两种协变量表现出不同的灵敏度,以DEM为协变量的克里金插值的插值精度要高于以TRMM为协变量的克里金插值,研究区的降雨量与地形因素有更高的相关性。
语种：
中文
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连续4 a施有机肥降低紫泥田镉活性与稻米镉含量
作者：
薛毅;尹泽润;盛浩;马颢榴;周清;...
期刊：
环境科学 ,2020年41(4):1880-1887 ISSN：0250-3301
通讯作者：
Sheng, Hao(shenghao82@hunau.edu.cn)
作者机构：
[薛毅; 尹泽润; 盛浩; 马颢榴; 周清; 张杨珠] College of Resources and Environment, Hunan Agricultural University, Changsha;410128, China;[宋达清] Soil and Fertilizer Station of Zhuzhou County, Lukou;412000, China;[薛毅; 尹泽润; 盛浩; 马颢榴; 周清; 张杨珠] 410128, China
通讯机构：
College of Resources and Environment, Hunan Agricultural University, Changsha, China
关键词：
土壤重金属;土壤Cd形态;潴育性水稻土;大田施肥试验;Cd污染耕地修复与治理
摘要：
商品有机肥由于可能含镉( Cd), 并在施入后对水稻土中Cd的有效性具有“抑制”和“激活”的双重作用,导致施有机肥的稻米降Cd效应目前仍存在较大不确定性.通过选取湘东地区典型水稻土(紫泥田土种), 连续4 a定位监测了大田施用商品有机肥对双季稻稻米的降Cd效应,探索稻米Cd含量与双季稻不同生育期土壤Cd有效性、土壤因子( pH、土壤活性有机碳组分与铁氧化物)的关系.结果表明,施有机肥降低双季稻糙米Cd含量28% ~ 56%,且晚稻糙米Cd含量降幅( 43% ~ 56%)高于早稻糙米Cd含量的降幅( 28%~ 45%), 降幅的年际波动小.一方面,施有机肥也导致双季稻某些生育期(分蘖盛期自齐穗期)土壤有效态Cd含量平均下降6%~ 7%;土壤交换态Cd含量降低11%,土壤有机结合态Cd含量提高14%,直接反映土壤Cd有效性的降低.另一方面,施有机肥也稳定提升土壤pH值0.1 ~ 0.3个单位,促进土壤环境由酸性向微酸性发展,土壤活性有机碳组分(轻组有机碳、粗颗粒有机碳和细颗粒有机碳)含量大幅提升( 53%、77%和107%), 间接反映土壤Cd有效性的降低.本研究表明,紫泥田连续施有机肥后,土壤Cd有效性下降是双季稻米Cd含量降低的关键驱动因素.
语种：
中文
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