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不同耕作和种植模式对土壤团聚体分布及稳定性的影响
引用本文:杨如萍,郭贤仕,吕军峰,侯慧芝,郭天文.不同耕作和种植模式对土壤团聚体分布及稳定性的影响[J].水土保持学报,2010,24(1).
作者姓名:杨如萍  郭贤仕  吕军峰  侯慧芝  郭天文
作者单位:甘肃省农业科学院旱地农业研究所/农业部西北作物抗旱栽培与耕作重点实验室,兰州,730070
基金项目:国家“十一五”科技支撑计划重点项目(2006BAD15B06)
摘    要:通过多年定位试验,研究黄土高原丘陵沟壑区不同耕作制度和种植方式对坡耕地土壤团聚数量、分布和稳定性的影响。结果表明,不同耕作方式下,免耕覆盖处理和免耕处理可明显增加土壤中大团聚体的含量,免耕覆盖处理有着相对更高的团聚体稳定性,并且更易形成5mm水稳性团聚体;不同种植方式下,处理对大团聚体含量影响差异不显著。在同一耕作方式下不同种植方式的土壤大团聚体含量变化趋势不同。相关分析表明,大团聚体含量为土壤团聚体平均重量直径(MWD)产生影响的主要因素,容重对土壤团聚体平均重量直径亦有影响,团聚体破坏率只对水稳团聚体平均重量直径有影响。

关 键 词:耕作方式  种植方式  土壤团聚体  平均重量直径(MWD)  

Affects of Distribution and Stability on Soil Aggregate in Different Patterns of Tillage and Cropping
YANG Ru-ping,GUO Xian-shi,LV Jun-feng,HOU Hui-zhi,GUO Tian-wen.Affects of Distribution and Stability on Soil Aggregate in Different Patterns of Tillage and Cropping[J].Journal of Soil and Water Conservation,2010,24(1).
Authors:YANG Ru-ping  GUO Xian-shi  LV Jun-feng  HOU Hui-zhi  GUO Tian-wen
Institution:YANG Ru-ping,GUO Xian-shi,LV Jun-feng,HOU Hui-zhi,GUO Tian-wen (Dryl, Agriculture Institute,Gansu Academy of agriculture Sciences/Key Laboratory of Northwest Drouhgt-resisting Dryl, Farming,Ministry of Agriculture,Lanzhou 730070)
Abstract:A study of different tillage and cropping patterns was conducted by years on Loess Plateau hilly,by which effects of tillage and cropping patterns on quantity,distribution and stability of soil aggregate. The result showed that,in different tillage patterns,no-tillage with straw cover(NTS) and no-tillage (NT) has a significant impact on increased macro-aggregate content,specially in NTS,which has higher stability of soil aggregates than other treaments,moreover,it has more water-stable aggregates of >5 mm; ...
Keywords:patterns of tillage  patterns of cropping  soil aggregate  mean weight diameter (MWD)  
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