大豆肥田机制的研究Ⅴ.大豆对耕层土壤结构性的影响  

STUDY ON THE MECHANISM OF SOYBEAN'S FERTILIZING SOIL 5. The effect of soybean on thestructure of the tilith soil

作　　者：马和平[1] 龚振平[1] 王国义[1] 焦景宇 岳才军[1] 沈昌蒲[1] 

机构地区：[1]东北农业大学,哈尔滨150030

出　　处：《大豆科学》2001年第4期257-261,共5页Soybean Science

基　　金：国家自然科学基金资助

摘　　要：在大豆盛花期和结荚期 ,土壤水稳性团聚体数量达到最大值 ,比苗期增加 30 %。玉米区土壤在同一时期水稳性团聚体也达到最大值 ,比苗期增加 2 3%。但在收获期 ,大豆区水稳性团聚体比苗期增长 16% ,而玉米区却减少 33%。大豆区团聚体 (0 5 - 1mm和 1- 2mm粒径 )对水的稳定性指数比玉米高 17 5 %。从水分能量观点出发 ,易于被作物从中吸收有效水分的 0 0 5 - 0 0 1mm和 0 0 1- 0 0 5mm的孔径孔隙 ,大豆区始终高于玉米区。作物吸收水分较困难的 >0 0 5mm和 <0 0 0 5mm孔径孔隙 ,在大豆生育期中迅速减少 。The content of soil water stable aggregates reaches the maximum value during soybean blooming and podding stage, which is 31.7% higher than it's seedling stage. The corn plot also reaches the maximum value at the same stage, which is 22.9% higher than it's seedling stage. During the soybean havesting stage, the stable aggregates are 15.9% higher than it's seedling stage and the corn plot decreases by 32.8% .The water stable index(0.5-1mm and 1mm-2mm aggregates) is 17.5% higher than corn plot. From the po...

关 键 词：大豆 土壤结构 水稳性指数 当量孔径孔隙 

分 类 号：S565.1[农业科学—作物学]