农业工程学报2012，Vol.28Issue(3)：94-100,7.DOI:10.3969/j.issn.1002-6819.2012.03.017
夏闲期不同耕作模式对土壤蓄水保墒效果及作物水分利用效率的影响
Effects of different tillage patterns during summer fallow on soil water conservation and crop water use efficiency
摘要
Abstract
In order to seek the effects of different tillage patterns during summer fallow on soil water conservation and crop water use efficiency, a field study was conducted to determine the effect of conservation tillage on soil water and winter wheat yield in arid areas of southern Ningxia from 2007 to 2010. Tillage treatments comprised NT/ST/NT (no-tillage in first year, subsoiling tillage in second year, again no-tillage in third year), ST/NT/ST (subsoiling tillage in first year, no-tillage in second year, again subsoiling tillage in third year), CT (conventional tillage in 3 years). The results showed that conservation tillage patterns could improve soil water condition in wheat field and significantly increase crop yield and water use efficiency. At the end of summer follow period, compared with CT, the 3-year mean soil water storage of NT/ST/NT and ST/NT/ST treatments in the 0-200 cm soil layers increased by 3.92% and 7.84% (P<0.05), the 3-year mean fallow rainfall storage efficiency increased by 13.64% and 22.80% (P<0.05), respectively. During wheat growing season, the 3-year mean soil water storage (0-200 cm) in NT/ST/NT and ST/NT/ST increased by 7.96% and 8.60% (P<0.05), mean growing season rainfall use efficiency increased by9.59% and 10.69% (P<0.05), mean year rainfall use efficiency increased by9.52% and 10.65% (P0.05), respectively. Compared to CT, the 3-year mean wheat yield for NT/ST/NT and ST/NT/ST increased by 9.59% and 10.69% (P0.05), mean grain yield water use efficiency increased by 7.17% and 7.68% (P<0.05), mean biomass yield water use efficiency increased by 3.83% and 4.34% (P<0.05), respectively.关键词
土壤/含水率/干旱区/耕作模式/冬小麦产量/水分利用效率Key words
soils/moisture/arid regions/tillage patterns/winter wheat yield/water use efficiency分类
农业科技引用本文复制引用
侯贤清,李荣,韩清芳,王维,贾志宽..夏闲期不同耕作模式对土壤蓄水保墒效果及作物水分利用效率的影响[J].农业工程学报,2012,28(3):94-100,7.基金项目
"十一五"国家科技支撑课题"农田集雨保水关键技术研究"(2006BAD29B03)及"节水共性技术研究"(2007BAD88B10) （2006BAD29B03）
