秸秆还田对盐渍化草甸土有机质及微团聚体组分的影响  

Effect of straw returning on organic matter and micro-aggregate in salinized meadow soils

作　　者：周连仁[1] 国立财[1] 于亚利[1] 

机构地区：[1]东北农业大学资源与环境学院,哈尔滨150030

出　　处：《东北农业大学学报》2012年第8期123-127,共5页Journal of Northeast Agricultural University

基　　金：公益性行业(农业)科研专项(200903001-06-6);东北农业大学创新团队项目

摘　　要：土壤肥力水平的高低,在很大程度上取决于它对水、肥的保蓄与释供能力及与此有关的自动调节性能。不同粒级的微团聚体是产生所述功能的物质基础。以肇州的盐渍化草甸土为研究对象,针对盐渍化草甸土理化性质不良、土壤肥力低下,进行秸秆还田培肥试验,研究秸秆还田不同处理对盐渍化草甸土有机质和微团聚体组成的影响。结果表明,秸秆还田之后,有机质含量增加,1~0.25、0.25~0.05 mm的微团聚体含量呈现上升态势,其中,施用有机肥的处理效果极显著（P〈0.01）;0.05~0.01 mm的微团聚体含量呈现下降态势,一半秸秆还田＋有机肥＋分解菌的处理效果最显著（P〈0.01）;微团聚体含量（〈0.01 mm）变化有增有减。有机质的含量与微团聚体组分呈显著相关。Soil fertility depends on soil moisture and fertilizer conservation and release,and the capability of automatic regulation at largely extent.Different levels of the micro-aggregate are material bases of such function.The straw returning experiment was conducted to study organic matter and micro-aggregate in salinized meadow soil affected by different straw returning treatment.The results showed that the content of organic matter increased after straw returning,micro-aggregate demonstrated 0.05 mm was ascended,and the treatment of organic fertilizer showed significant level.Micro-aggregate demonstrated 0.05-0.01 mm was declined,and the treatment of half straw returning and organic fertilizer and decomposer showed significant level.And some of micro-aggregate demonstrated 0.01 mm was ascended,another was declined.The content of organic matter was prominently related to micro-aggregate demonstrated.

关 键 词：盐渍化草甸土 秸秆还田 微团聚体 

分 类 号：S153.6[农业科学—土壤学]