长期定位监测黑土结构质量指标的分异研究  

Index variations of structure and quality of black soil with a long-term located monitoring

作　　者：王铁宇[1] 颜丽[2] 汪景宽[2] 关连珠[2] 朱平[3] 

机构地区：[1]中国科学院生态环境研究中心,北京100085 [2]沈阳农业大学土壤肥力研究室,沈阳110161 [3]吉林省农业科学院土壤肥料研究所,公主岭136100

出　　处：《中国生态农业学报》2004年第4期138-141,共4页Chinese Journal of Eco-Agriculture

基　　金：国家重点基础研究 ( 973 )发展规划项目 (G19990 11810 )资助

摘　　要：长期定位监测研究不同施肥处理黑土结构指标的分异结果表明 ,长期施用有机肥有利于 0 .0 5～ 0 .0 2mm和 0 .0 2～ 0 .0 0 2mm土壤粒级微团聚体形成及 >0 .2 5mm团聚体水稳性 ,并一定程度促进小粒级微团聚体的团聚 ;单施N肥处理土壤容重最大 ,对照处理土壤结构已明显退化且团聚体水稳性较低 ,而休闲地团聚体水稳性明显较高 。The index variations of structure and quality of black soil with a long-term located monitoring are analyzed.The results show that a long-term utilization of organic manure increases the microaggregate of the fraction,i.e.0.05～0 02mm,0.02～0.002mm and the waterstable capability of soil aggregate (>0.25mm),and may facilitate the microaggregate to form lots of stable clay-particles.The soil bulk density of single use of N disposal is the largest in all the fertilized treatments, the soil structure of CK is markedly degenerated and the soil aggregate waterstable is low ,while the soil aggregate waterstable capability of fallow is markedly higher compared with others,thus indicating that the organic materials play a determinative role in the shape and conservation process of soil structure.

关 键 词：长期定位 黑土 微团聚体 土壤结构 土壤粒级 施肥处理 N肥 分异 指标 标的 

分 类 号：S152.4[农业科学—土壤学] S143.3[农业科学—农业基础科学]