Effect of Rice—Based Cropping System on Organic Matter Status in Soils土壤圈：英文版论文
【题名】：Effect of Rice—Based Cropping System on Organic Matter Status in Soils土壤圈：英文版论文(Effect of Rice—Based Cropping System on Organic Matter Status in SoilsTuRangQuan：YingWenBanLunWen) 【关键词】：有机金属矿物 配位数 有机物 基本农田系统 硒利用率 土壤肥力 【keywords】：YouJiJinShuKuangWu PeiWeiShu YouJiWu JiBenNongTianXiTong XiLiYongLv TuRangFeiLi 【作者】：XIAOYONGLAN,YANGDONGPING,等      【来源】： 知识词典 【期刊名称】：土壤圈：英文版(TuRangQuan：YingWenBan) 【国际标准刊号】：1002-0160        【国内统一刊号】：32-1315 【作者单位】：[1]DepartmentofNaturalResources,HunanAgriculturalUniversity,Changsha410128（China） [2]SoilandFertilizerCente([1]DepartmentofNaturalResources,HunanAgriculturalUniversity,Changsha410128（China） [2]SoilandFertilizerCente) 【分类号】：S153.62      【页码】：-349-354      【出版年】：1997.4         A long-term simulation experiment was carred out to study the effect of rice-based cropping system,green manure and ground-water level on soil organic matter.Soil organic matter content increased when upland soil was puddled and cropped under submerged conditions.Among all treatments,soil organic matter contents in the treatments of rice-rice-flooded fallow in winter(WF)were the highest,those in the treatments of rice-rice-astragalus(WG) came the seond,and those in the treatments of rice-rice-rape(WR). were the lowest At the same rate of green manur application,the degrees of organo-mineral compleing in soils of treatments WG and WR were higher than those of treatment WF.After 9-year rice cultivation, the state of combination of humus in heavy fraction varied with treatments.The relative content of loosely bonded humus decreased in the order of WR>WG>WF,and it correlated significantly with Se availability.
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