中国农业大学学报2011，Vol.16Issue(4)：74-79,6.
黄土高原旱地保护性耕作农田土壤团聚体特性变化研究
Effects of conservation tillage on soil aggregates in dry land of loess plateau
摘要
Abstract
The paper studied the effects of conservation tillage on the soil aggegate and organic carbon by years on Loess Plateau.The spring maize cultivars Shenyu17 were used in the test under three farming modes of No tillage（NT）,conventional tillage＋Straw returning（TS） and conventional tillage（CT）.To study the effects,soil organic matter content was measured,and the aggregates composition,size distribution were examined by dry and wet sieving methods.The results showed that,NT significantly increased soil organic matter content compared with TS and CT.Dry sieving results showed that NT was higher in macro-aggregate content（R〉0.25） and mean weight diameter（MWD） than other treatments at 0-30 cm.Wet sieving results showed that the MWD of water-stable aggregates showed the trend：NT〉TS〉CT at 0-10 cm,Their differences reached the significant level of P〈0.05 among the three tillage treatments.At 0~20cm,Destruction rate of aggregate under NT was higher than CT.NT increased the aggregation and the stability of soil aggregates,while due to intense disturbance,the aggregation and stability were decreased under CT.关键词
黄土高原/保护性耕作/有机质/团聚体/平均重量直径Key words
loess plateau/conservation tillage/organic carbon/soil aggregate/MWD分类
农业科技引用本文复制引用
赵如浪,冯佰利,蒋树怀,张小东,屈洋,蔡晓青,朱瑞祥..黄土高原旱地保护性耕作农田土壤团聚体特性变化研究[J].中国农业大学学报,2011,16(4):74-79,6.基金项目
农业部先正达农业科教及农村发展项目 （）
公益性行业（农业)科研专项经费资助（200903007) （）
