期刊:
International Journal of Environmental Research and Public Health,2023年20(2) ISSN:1661-7827
通讯作者:
Yujie Liu<&wdkj&>Qing Wu
作者机构:
[Li, Xigui] Hunan Agr Univ, Coll Landscape Architecture & Art Design, Changsha 410128, Peoples R China.;[Wu, Qing] Zhaoqing Univ, Tourism & Hist Culture Coll, Zhaoqing 526061, Peoples R China.;[Wu, Qing] Nanjing Normal Univ, Sch Geog, Nanjing 210023, Peoples R China.;[Liu, Yujie] Cent China Normal Univ, Coll Urban & Environm Sci, Wuhan 430079, Peoples R China.
通讯机构:
[Yujie Liu; Qing Wu] T;The College of Urban & Environmental Sciences, Central China Normal University, Wuhan 430079, China<&wdkj&>Tourism and Historical Culture College, Zhaoqing University, Zhaoqing 526061, China<&wdkj&>School of Geography, Nanjing Normal University, Nanjing 210023, China
关键词:
PSR-VOR model;cultivated land system health;two lake plains;zoning regulation
摘要:
Abstract: Cultivated land resources are the material basis of sustainable agricultural development. Climate change, food security, land pollution, and other issues highlight the value of sustainable agricultural development, and the health of the cultivated land system has attracted much attention. By constructing “PSR-VOR” cultivated land system health evaluation framework under the 5 km grid scale and using GIS spatial analysis and mathematical statistics to comprehensively evaluate the health status of the cultivated land system in the two lake plains from 2000 to 2019. The major results have shown that: (1) Over the past 20 years, both the highest and average values of the health index of the cultivated land system have gone down, and the health status of the cultivated land system has changed and gotten worse over time. (2) The health status in the two lake plains has been generally good, mainly in Class I and Class II areas. However, the area of cultivated land with general and poor health status has increased rapidly. On the whole, the health level presents the characteristic of gradually decreasing from the northeast to the southwest and southeast. (3) During the study period, the global Moran’s I value of the cultivated land system health index in the two lake plains increased from 0.686 to 0.729, with significant spatial positive autocorrelation, and the spatial heterogeneity of the cultivated land system health index gradually increased. As shown by the spatial distribution characteristics of high in the north, low in the south, and decreasing from the middle to the outside, the distribution of the high-value cluster area and the low-value cluster area of the cultivated land system health index in the two lake plains has not changed significantly over the past 20 years. (4) The two lake plains are divided into five areas: a moderate optimization area, a collaborative optimization area, a potential improvement area, a key improvement area, and a priority improvement area. The urgency of regulating the health status from the moderate optimization area to the priority improvement area has gradually increased, and the differentiated utilization and management of cultivated land resources need to be carried out according to local conditions. Keywords: cultivated land system health; PSR-VOR model; zoning regulation; two lake plains
通讯机构:
[Qingru Zeng] D;Department of Environmental Science & Engineering, Hunan Agricultural University, Changsha 410128, China
关键词:
heavy metal;hydrochar;Cd;HCl;sunflower;species
摘要:
Abstract: The removal of heavy metals is crucial to the utilization of contaminated biomass resources. In this study, we report an efficient process of hydrothermal conversion (HTC) of sunflower straw (Helianthus annuus L.) to remove heavy metals. The effect of different HTC temperatures and concentrations of HCl additives on heavy metal removal efficiency was investigated. The results revealed that increasing the temperature or concentration of HCl promoted the transfer of heavy metals from hydrochar to liquid products during HTC. The heavy metals removed to the liquid products included up to 99% of Zn and Cd, 94% of Cu, and 87% of Pb after hydrothermal conversion with a temperature of 200 °C and HCl 2%. The species of heavy metals in hydrochars converted from unstable to stable with an increase in temperature from 160 °C to 280 °C. The stable fractions of heavy metals in the acidic condition decreased as the acid concentration increased. This aligns well with the high transfer efficiency of heavy metals from the solid phase to the liquid phase under acidic conditions. The FTIR indicated that the carboxy and hydroxy groups decreased significantly as the temperature increased and the concentration of HCl increased, which promoted the degradation of sunflower straw. A scan electron microscope showed that the deepening of the destruction of the initial microstructure promotes the transfer of heavy metals from hydrochars to liquid phase products. This acid-assisted hydrothermal process is an efficient method to treat biomass containing heavy metals. Keywords: heavy metal; hydrochar; Cd; HCl; sunflower; species
摘要:
Presently, global aging has become increasingly serious, whereas the health concerns brought by aging have become a public issue that warrants an urgent solution from all countries across the world. Therefore, this research paper discusses the influence of neighborhood health on elderly individuals’ health, and extending a realistic basis for the other economies to improve the neighborhood environment and promote the health of the elderly. Based on the data of CHARLS2018, this research paper adopts the samples that fulfill the study requirements (N = 7326). we constructed a comprehensive research framework integrating oprobit regression model, heterogeneity analysis, conditional mixed process(CMP)robustness testing, Furthermore, the KHB decomposition method is implemented to ascertain the influential mechanism of NMH and NPH on the mental- and physical health of elderly persons. The oprobit regression model analysis indicates that NMH 0.434 and NPH 0.550 exert positive influences on the elderly’s mental- and physical health. Meanwhile, the effects of conditional mixed process on NMH and NPH stand at 0.381 and4.372, which are different from the oprobit regression results; thereby, indicating the existence of endogeneity. Afterward, KHB mediating effect confirms that Internet use, gift reciprocity, and charity activity contribute 30.21% and 16.83% to mental- and physical health, respectively. Firstly, the NMH and NPH demonstrate a positive influence on the mental- and physical health of the elder population. However, there exist heterogeneous differences. Secondly, the conditional mixed process deals with the endogeneity of NMH and NPH. Thirdly, social integration, social interaction, and social engagement serve as significant transmission mechanisms for the influences of NMH and NPH on the health of elderly persons.
摘要:
In the recent world of catastrophe, scholars and policymakers have empirically examined the influence of various economic and financial instruments on environmental quality. Still, the literature is limited in terms of displaying the factors affecting public health, particularly in case of China. This study aims is to examine the nexus between green electricity, government efficiency, and health issues to draw novel policies. The current study investigates role of electricity production, eco-innovation and institutional factors for overall public health in China using the data from 2000Q1-2021Q4, which is a novel contribution to the existing literature. For empirical analysis, the study employs cointegration analysis, quantile regression and fully modified ordinary least square methods. The empirical result found the validity of the long-run equilibrium relationship. However, the asymmetric distri-bution of all variables allows this study to use a non-parametric "quantile regression" approach. The empirics depicts that economic growth and renewable electricity production positively influence public health-increase health-related issues. On the contrary, eco-innovation and government effectiveness substantially reduces public health issues. The empirical results are authenticated by the applying three parametric approaches - fully modified ordinary least square, canonical cointegration regression, and dynamic ordinary least square. To explore the causal connection between the variables, this study uses granger causality test - validates the presence of unidirectional and bidirectional causalities between variables. This study suggests enhancement in government effectiveness, expenditure, and eco-innovation to reduce critical health issues in the country.
关键词:
elderly land;POI;suitability evaluation;layout optimization;stock land
摘要:
Abstract: This paper constructs an evaluation index system for the suitability of community home and institutional elderly care land development, respectively, from different elderly care modes with the data of urban POI, OSM road network, and expert questionnaires in Changsha urban area in 2021, in order to alleviate the pressure of insufficient land for elderly care brought on by the increasingly serious aging problem. The suitability evaluation index system is based on the intersection of Thiessen polygons with the current elderly care facilities as the center point as the supplementary land for the elderly and explores the optimization path of the land for the elderly in combination with the existing residential land in Changsha. The results show the following: ① The spatial variation of land suitability for both community home and institutional elderly facilities is significant, exhibiting a pattern of “high in the middle and low in the surroundings, with high-value areas clustered in the center of the city, decreasing in suitability toward the periphery, and occasional scattered clusters in the suburbs.” Among them, Furong District has the highest proportion of suitable areas for the elderly; ② Utilizing Changsha’s Tianxin and Yuhua districts as case studies, the optimal path of land use for the elderly are investigated to provide a foundation for land use planning for the elderly in Changsha. Keywords: elderly land; POI; suitability evaluation; layout optimization; stock land
关键词:
behavior intention;Theory of Planned Behavior (TPB);Technology Acceptance Model (TAM);Innovation Diffusion Theory (IDT);Motivational Model (MM)
摘要:
Green control techniques (GCT) are an important supporting technology to ensure sustainable agricultural development. To advance the adoption of GCT, it is crucial to understand the intention of farmers to adopt GCT and its related determinants. However, current research is mostly limited to using a single theoretical model to explore farmers' intentions to adopt GCT, which is not conducive to revealing the determinants of farmers' intentions to adopt GCT. To address this gap, this study integrates the Theory of Planned Behavior (TPB), the Technology Acceptance Model (TAM), the Innovation Diffusion Theory (IDT), and the Motivational Model (MM) based on research data from 362 rice farmers in Heshan District, Yiyang City, Hunan Province, and uses partial least squares structural equation modeling (PLS-SEM) to empirically test and compare the above models. The model comparison results prove that the TPB (R-2 = 0.818, Q(2) = 0.705), TAM (R-2 = 0.649, Q(2) = 0.559), IDT (R-2 = 0.782, Q(2) = 0.674), and MM (R-2 = 0.678, Q(2) = 0.584) models all have explanatory power and predictive validity in the context of green control techniques. However, the integrated model (R-2 = 0.843, Q(2) = 0.725) is found to be superior to these individual theoretical models because it has larger values of R-2, Q(2), and smaller values of Asymptotically Efficient, Asymptotically Consistent, and provides a multifaceted understanding for identifying the factors influencing adoption intentions. The results of the path analysis show that attitude, perceived behavioral control, perceived usefulness, subjective norm, and visibility significantly and positively influence adoption intentions in both the single and integrated models and are determinants of farmers' intentions to adopt GCT.
关键词:
base fertility;soil nutrients;enzyme activity;fertilizer application patterns
摘要:
Abstract: The majority of crop-growing areas in China have low or medium fertility levels, which limits the yield of crops grown in those areas. Fertilizer application can improve soil quality, but the effects of such treatments vary depending on the base soil fertility. However, the specific differences associated with the application of different fertilizer types to soils of varying fertility levels have yet to be clearly delineated. Here, the influences of several fertilizer types on physical, chemical, and biological soil indicators were assessed in rice fields in the red soil area of Hunan Province with varying base fertility levels: Hehua (low fertility), Dahu (medium fertility), and Longfu (high fertility). Four treatments were applied to these fields: no fertilizer, standard fertilizer, 60% chemical fertilizer + 40% organic fertilizer, and 100% chemical fertilizer. Across the three sites and treatment groups, the largest increases in total nitrogen and phosphorus contents were in Hehua and Longfu, respectively. Soil organic matter content increased most significantly in Hehua. Application of any type of fertilizer increased the total and fast-acting nutrient content in the low-yielding fields, whereas organic fertilizers increased the nutrient content and soil biological indicators more than chemical fertilizer alone did; the effect of organic fertilizer application on the combined enzyme activity of the soil was also higher than that of chemical fertilizers alone. Overall, these experiments provide a theoretical basis and technical support for rational fertilizer application and improvement of Hunan’s red soil quality based on the natural soil fertility levels. Keywords: base fertility; soil nutrients; enzyme activity; fertilizer application patterns
通讯机构:
[Yongliang Han] C;College of Resources and Environmental, Hunan Agricultural University, Changsha 410128, China<&wdkj&>National Engineering Research Center for Efficient Utilization of Soil and Fertilizer Resources, Changsha 410128, China
关键词:
double cropping rice;fertilization depth;Yield;utilization efficiency of N and P;N and P losses
摘要:
(1) Background: the broadcast is an outdated fertilization method with a low fertilizer-utilization rate and environmental problems, which seriously restricts the development of agriculture. (2) Methods: Under a machine-transplanted rice with side-deep fertilization (MRSF) mode, five treatments were applied: 0 cm (D0), 5 cm (D5), 7.5 cm (D7.5), and 10 cm (D10), comprising four different depths of fertilization, and no fertilization (CK). The yield, the accumulation of N and P in the straw and in grains of rice, concentrations of N and P in the surface water, ammonia (NH3) volatilization, and soil nutrients were measured in rice fields. (3) Results: In rice yields, compared with the D0 treatment, only the D7.5 treatment significantly increased by 7.84% in late rice, while the other treatments showed no significant difference between early and late rice. The N- and P-use efficiency of D10 increased by 5.30-24.73% and 0.84-17.75%, respectively, compared with the D0-D7.5 treatments. In surface water, compared with the D0 treatment, D5, D7.5, and D10, the total N (TN), total P (TP) concentration, and NH3 volatilization decreased by 10.24-60.76%, 16.30-31.01%, and 34.78-86.08%, respectively; the D10 treatment had the best inhibition effect on the TN, TP concentration, and NH3 volatilization, which were 58.48-60.76%, 22.04-31.01%, and 77.21-86.08%, respectively. (4) Conclusions: The optimized depth for side-deep fertilization was 10 cm. We would like to emphasize the impact of the paddy on various deep fertilizations and provide an important reference for developing precise fertilization in rice fields in this area.
摘要:
Abstract The objective of this study is to examine the impact of government environmental concerns on green innovation and whether this has a “leverage effect” or a “crowding‐out effect.” This study employs a two‐way fixed‐effects model to conduct an empirical test using panel data from 2010 to 2020 on Chinese firms listed in heavy‐polluting industries. The results suggest that an increase in government environmental concerns can promote corporate green innovation. However, government environmental concerns primarily stimulate strategic innovation rather than substantive innovation. After a series of robustness and endogeneity tests, the conclusions of this paper still hold. Corporate green innovation induced by government environmental concerns is not the “leverage effect” superimposed on existing innovation activities but the “crowding‐out effect” of other technological innovation. The heterogeneity tests in this paper indicate that the impact is more pronounced for firms with poorer environmental conditions, stronger political connections, and richer executive backgrounds.
通讯机构:
[Lijuan Zhou] S;School of Public Management and Law, Hunan Agricultural University, Changsha 410128, China
关键词:
Internet use;sense of security;trust in the government;China;intermediary effect
摘要:
With the rapid development of communication technologies, the Internet use has become the main channel for citizens to obtain information and knowledge. It has been widely established that Internet use can have a significant impact on citizens’ expectations, perceptions, and behaviors. Government trust is the reasonable expectation of citizens on in the administrative activities of the government and its administrators, which should rightly be influenced by the behavior of citizens’ Internet use. However, limited studies have investigated the relationship between Internet use and citizens’ trust in the government. Therefore, in this study, the effect of Internet use on trust in the government was investigated using data from the 2017 Chinese Social Survey. The baseline regression results revealed that Internet use reduces trust in the government. This phenomenon was persistently observed after several robustness tests. A heterogeneity analysis revealed that Internet use negatively influenced citizens from Eastern and Western China, lower age groups, and agricultural households. Social amplification of the risk and the theory of rational choice revealed that a sense of security partially mediates the relationship between Internet use and citizens’ trust in the government. Internet use reduces citizens’ sense of security and subsequently decreases trust in the government. Our findings revealed establishing a network information supervision and public opinion guidance mechanism. At the same time, consider the role of social security services in resolving social risks. These initiatives are essential to ensure citizens’ trust in their government.
期刊:
Journal of Affective Disorders,2023年321:66-73 ISSN:0165-0327
通讯作者:
Changlian Tan<&wdkj&>Xiongzhao Zhu
作者机构:
[Fan, Jie; Zhu, Xiongzhao; Liu, Wanting; Gan, Jun; Yi, Jinyao] Cent South Univ, Xiangya Hosp 2, Med Psychol Ctr, Changsha 410011, Hunan, Peoples R China.;[Gan, Jun] Hunan Agr Univ, Coll Educ, Changsha 410128, Hunan, Peoples R China.;[Fan, Jie; Zhu, Xiongzhao; Liu, Wanting; Yi, Jinyao] Cent South Univ, Medial Psychol Inst, Changsha 410011, Hunan, Peoples R China.;[Fan, Jie; Zhu, Xiongzhao] Natl Clin Res Ctr Mental Disorders, Changsha, Hunan, Peoples R China.;[Tan, Changlian] Cent South Univ, Dept Radiol, Xiangya Hosp 2, 139 Renmin Middle Rd, Changsha 410011, Hunan, Peoples R China.
通讯机构:
[Changlian Tan] D;[Xiongzhao Zhu] M;Department of Radiology, Second Xiangya Hospital, Central South University, 139 Renmin Middle Road, Changsha, Hunan 410011, China<&wdkj&>Medical Psychological center, the Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China<&wdkj&>Medial Psychological institute of Central South University, Changsha, Hunan 410011, China.<&wdkj&>National Clinical Research Center for Mental Disorders, Changsha, Hunan, China
关键词:
Insight;Neurocognition;Symptomatology;Brain structure;Brain function
摘要:
BACKGROUND: Despite the several researches on the correlates of insight in psychosis, less is known regarding the specificity of disease diagnosis on the relationship between insight and the correlates. The current study sought to explore the effects of insight and disease diagnosis on those in patients with obsessive-compulsive disorder (OCD) and patients with schizo-obsessive disorder (SOD). METHODS: We evaluated clinical symptoms and neurocognitions among 111 patients (including 41 OCD with good insight, 40 OCD with poor insight, 14 SOD with good insight and 16 SOD with poor insight. Gray matter volume and spontaneous neural activity were also examined by analyzing the voxel-based morphometry and amplitude of low frequency fluctuation (ALFF), respectively. RESULTS: Interactive effects of insight and diagnosis was found on working memory and the gray matter volume in right superior and middle temporal gyrus. Main effect of insight was found on working and visual memory, compulsion and obsession, and ALFF in right middle and superior occipital cortex. Main effect of diagnosis was found on severity of compulsion, relative verbal IQ, executive function, verbal and visual memory, working memory and ALFF in precuneus, medial superior frontal gyrus, anterior cingulate and paracingulate gyri, and inferior parietal, postcentral gyrus, paracentral lobule. CONCLUSIONS: As a common feature in mental disorders, insight has its own special influence on neurocognition and possible structural/functional alterations in brain, and the influence is partly dependent of disease diagnosis.
通讯机构:
[Hui Liu] S;School of Economics, Hunan Agricultural University, Changsha 410128, China
关键词:
climate change;farm irrigation facilities;agriculture total factor productivity (TFP);technical advancement
摘要:
Abstract: Due to the trend of global warming, individuals from all walks of life have paid close attention to how climate change affects food security. China is a sizable nation with a rich climate and a diverse range of food crops that are of interest to researchers. Additionally, there is little mention of agricultural technology and farm irrigation facilities in academic research on climate change and agricultural economic growth in China. As a result, this study uses the SBM model, panel fixed effect model, and SYS-GMM model to examine the development trend of climate change and food security based on the panel data of Chinese provinces from 2000 to 2020. The study found that China has maintained an average annual growth rate of 4.3% in agricultural total factor productivity (TFP) in recent years, despite the impact of extreme weather. The average annual precipitation has a depressing influence on the TFP in agriculture, while the average annual temperature has the opposite effect. The farm irrigation facilities and agricultural technology’s moderating impact is mostly shown in how well they attenuate the impact of climate change on the TFP in agriculture. Food crops have thereby improved their ability to survive natural risks and attain higher yields as a result of advancements in agricultural technology and increasing investment in contemporary farm irrigation facilities. The study’s conclusions are used in the article to make the suggestion that strengthening climate change adaptation is necessary to ensure food security. The strategic policy of “storing grain in technology and storing grain in the soil” and the advancement of contemporary agricultural technology must be put into reality while the management system for grain reserves is being improved. Keywords: climate change; farm irrigation facilities; agriculture total factor productivity (TFP); technical advancement
通讯机构:
[Chun Li; Xingyao Xiong] C;College of Horticulture, Hunan Agricultural University, Changsha 410128, China<&wdkj&>Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518120, China<&wdkj&>College of Information and Intelligence, Hunan Agricultural University, Changsha 410128, China
关键词:
plant community color;autumn color;color characteristic;aesthetic preference;scenic beauty estimation (SBE);principal component analysis (PCA);urban park
摘要:
Contemporary landscape architecture studies have paid close attention to the interactions between public aesthetic preferences and the landscape environment. Scenic beauty has become an important evaluation indicator of landscape quality. The quality of the plant color landscape is an important factor affecting scenic beauty. Exploring the relationship between the composition rules and internal properties of autumn plant color landscapes in urban parks and public aesthetic preferences can provide new ideas for the evaluation and design of plant community color landscapes. Taking 12 parks in Changsha City, Hunan Province, China, as the study area and 85 plant communities as the sample plots, scenic beauty estimation (SBE) was used to evaluate the autumn plant color landscape of urban parks. ColorImpact software was used to extract the color values of each plant community. Fifteen original color element indicators were determined, and the data were statistically analyzed by principal component analysis (PCA), one-way ANOVA, multiple comparison analysis and systematic cluster analysis. Four principal components were extracted to construct the characteristic indices and a comprehensive model of the color landscape quality of autumn plant communities. The four characteristic indices showed significant or extremely significant differences among the five SBE grades. From the overall trend, the SBE grades showed a positive correlation with PC1 (primary and adjunctive color index), PC2 (color structure and property index) and PC3 (autumn-color-leafed index) and a negative correlation with PC4 (intersperse color index). R-PH (ratio of primary hue), R-P (ratio of primary color), R-C (color-leafed index), R-WC (ratio of warm and cool colors), and N-C (number of colors) were the key factors affecting the SBE grade. Overall, R-PH, R-P, R-C, and R-WC positively influenced the SBE values, while N-C negatively influenced the SBE values, and five to seven colors were more moderate. The quality of the color landscape can be improved by creating plant communities with three types of color composition: warm-toned dominant type, warm- and cold-toned contrast type, and multicolor harmonic type. The results provide a reference for the evaluation, design and construction of autumn plant color landscapes in urban parks.
摘要:
Behaviour-based pricing (BBP) fully considers the willingness to pay, behavioural characteristics and rational expectations of new and old customers and can dynamically adjust pricing strategies based on purchase histories. Therefore, compared with uniform pricing, BBP can promote the development of green products in the market. Additionally, BBP gradually influences the pricing decisions of the supply chain. Therefore, this paper explores for the first time the pricing decisions and coordination mechanisms of the green product supply chain (GPSC) under a behavioural pricing model. BBP is implemented under two scenarios, centralisation and decentralisation, and the optimal pricing and supply chain decision-making are compared. Under the centralised scenario, the profit, greenness, market share and environmental friendliness are all higher than those under the decentralised scenario, and in most cases, consumers can better afford green products. Therefore, a revenue-sharing model is designed to realise GPSC coordination under BBP. The numerical experiments show that the proportion of revenue shared by green product retailers is positively correlated with the initial market share of green products; the proposed coordination mechanism can improve the greenness and profits of enterprises in a GPSC, the consumer surplus of green products and the overall environment performance.