陕西师范大学学报：自然科学版2011，Vol.39Issue(5)：90-95,6.
不同开垦年限黑土区坡耕地土壤团聚体稳定性与有机质关系
The relationships between aggregate water stability and soil organic matter of slope land with different reclamation years in black soil region
摘要
Abstract
The relationships between aggregate water stability（3～5 mm） and organic matter of top soil in slope land,black soil region of Northwest China,were studied by slow wetting method from the perspectives of different reclamation years,soil layers and landforms.The results showed that soil aggregate water stability decreases significantly with the declining of soil organic matter after reclamation,but 40 years later,the change trend of both becomes steady and gentle.The content of water-stable aggregate with 0.2 mm,and MWDsw value is notably related with the organic matter,and the correlative coefficients is 0.979 and 0.956（P0.05）.Water stability in the surface soil is much better than that of subsurface.It lies in the content of the organic matter in surface soil is higher than that in subsurface.The correlation coefficient of water-stable aggregates of 0.2 mm,0.5 mm and MWD value with organic matter is 0.59,0.51 and 0.56 respectively.The water-stable aggregate of surface soil in different landform presents a wavy change,and the change is not very regularly which is caused by the different power of soil erosion,movement,deposition in slope position.MWDsw value is notably related with the organic matter of subsurface soil under three conditions.关键词
团聚体水稳性/土壤有机质/坡位/黑土Key words
aggregate water stability/soil organic matter/geomorphic position/black soil分类
农业科技引用本文复制引用
张孝存,郑粉莉,王彬,安娟..不同开垦年限黑土区坡耕地土壤团聚体稳定性与有机质关系[J].陕西师范大学学报：自然科学版,2011,39(5):90-95,6.基金项目
中国科学院西部行动计划（二期） （）
西北农林科技大学创新团队 （）
陕西省教育厅科研专项计划 （）
