期刊论文

中文

水土保持学报

1009-2242

2020

34

6

252-258

10.13870/j.cnki.stbcxb.2020.06.035

2017YFD0800101:国家重点研发计划 2016YFD0300901:国家重点研发计划 CARS-01-83:现代农业产业技术体系项目 1610132020022:中央级公益性科研院所基本科研业务费专项 161032019035:中央级公益性科研院所基本科研业务费专项 1610132020023:中央级公益性科研院所基本科研业务费专项 1610132020021:中央级公益性科研院所基本科研业务费专项

本校为第一机构

对我国农耕区土壤有机质区域变化及其与酸碱度和容重关系进行系统分析,为耕地地力提升和改善土壤结构提供支撑。基于国家级耕地长期定位监测点913个,统计分析全国及7大区域(东北NE、华北NC、西北NW、长江中游MYR、长三角YRD、华南SC、西南SW)耕层土壤有机质含量、酸碱度及容重变化特征。结果表明,全国农耕区耕层土壤有机质含量平均值为22.4~24.8 g/kg。其中有机质含量中等偏低的监测点位占比达72.5%。不同区域耕层土壤有机质含量差异显著(p

Analysis of the regional changes of soil organic matter(SOM)and its relationship with pH and bulk density(BD)in agricultural areas of China were conducted.That would provide support for improvement of cultivated land fertility and soil structure.The characteristic of SOM changes were analyzed based on 913 national long-term monitoring sites which were carried out in 7 regions(Northeast,NE;North China,NC;Northwest,NW;Middle of Yangtze River,MYR;Yangtze River Delta,YRD;South China,SC;and Southwest,SW).Soil pH and bulk density were also evaluated....