干旱地区农业研究2017，Vol.35Issue(6)：52-58,115,8.DOI:10.7606/j.issn.1000-7601.2017.06.08
轮耕对冬春休闲旱地土壤结构及团聚体稳定性的影响
Effects of rotation tillage patterns on soil aggregates stability and soil structure of the dry land in winter and spring fallow period
摘要
Abstract
To further explore the reasonable farming system in semiarid area,the effects of rotation tillage patterns on soil aggregates stability and soil structure of the dry land in winter and spring fallow period were conducted in south Ningxia from 2007 to 2010.There were four tillage treatments:no-tillage→subsoiling tillage→subsoiling tillage(N/S/S),subsoiling tillage→subsoiling tillage→no-tillage(S/N/N),no-tillage→no-tillage→no-tillage(NT)and conven-tional tillage(CT)as control.The effects of different tillage patterns on soil porosity,composition and stability of soil ag-gregate were examined.The results showed that in 0~20 cm soil layer,the soil bulk density and the soil porosity of N/S/S was significantly(P<0.05)decreased by 2.5% ~3.1% compared with CT and NT.The soil porosity in 20~40 cm soil layer of N/S/S was significantly increased by 2.8% compared with S/N/N(P<0.05).NT and S/N/N treat-ments were higher content of mechanically stable aggregates,water-stable aggregates,mean weight diameter(MWD)and geometric mean diameter(GMD)than CT in 0~40 cm soil layer.No-tillage more than two consecutive years(NT and S/N/N)could increase the mean weight diameter(MWD)and geometric mean diameter(GMD)of soil aggregates,and de-creased the destruction rate of aggregate,which could improved the soil structure stability and increased soil aggregates contents in semiarid regions.关键词
轮耕/团聚体/平均重量直径/几何平均直径/土壤容重/土壤孔隙度Key words
rotational tillage/soil aggregates/mean weight diameter(MWD)/geometric mean diameter(GMD)/soil bulk density/soil proosity分类
农业科技引用本文复制引用
赵冀,王维,张鹏,侯贤清,贾志宽,韩清芳..轮耕对冬春休闲旱地土壤结构及团聚体稳定性的影响[J].干旱地区农业研究,2017,35(6):52-58,115,8.基金项目
国家"十二五"863课题(2013AA102902) （2013AA102902）
"十二五"国家科技支撑计划课题(2012BAD09B03) （2012BAD09B03）
高等学校学科创新引智计划项目(B12007) （B12007）
公益性行业(农业)项目(201303104) （农业）
