干旱地区农业研究2012，Vol.30Issue(1)：126-131,6.
不同耕作方式对黑土农田土壤水分及利用效率的影响
Effects of tillage management on soil water dynamics, yield and water use efficiency in arable black soil cropping system in Northeast China
摘要
Abstract
A field experiment was conducted to evaluate the effects of no-tillage (NT) and reduced tillage (RT) on soil water storage, water use efficiency ( WUE), and their effects on corn yield in Northeast China. Soil moisture was measured from May to September in 2009, and water storage and WUE was calculated. The results showed that, com-pared to conventional tillage (CT), soil water content under NT was higher in 0 ~ 90 cm soil layer and the difference de-creased with soil depth increasing. There was no difference at the depth of 190 cm. Soil water storage was mainly influ-enced by rainfall and soil tillage, thus soil water storage was lower in windy and rainless spring and autumn, and they followed the order of NT > CT > RT. The soil water storage order changed to RT > NT > CT in rainy summer season. The furrow was loosened by zonal tillage in RT, which increased infiltration and benefited agriculture. LAI in NT was respec-tively 0.22 and 0.26 lower than those in CT and RT. The evapotranspiration ( ET) in RT during the growing season was the highest. The corn grain yield and WUE in CT were 30% and 17% higher than those in NT, and 29% and 11% higher than those in RT, respectively. The com grain yield in the three tillage systems were significantly different ( P < 0.05) . So NT and RT is infeasible in com production, and CT is still undeniable soil tillage practice with higher yield and WUE in arable black soil cropping system in this region.关键词
保护性耕作/玉米/土壤水分/水分利用效率/蒸散量Key words
conservational tillage/ com/ soil water dynamic/ water use efficiency/ evapotranspi ration分类
农业科技引用本文复制引用
刘爽,张兴义..不同耕作方式对黑土农田土壤水分及利用效率的影响[J].干旱地区农业研究,2012,30(1):126-131,6.基金项目
国家高技术研究发展计划(2008AA10Z212) （2008AA10Z212）
黑龙江省杰出青年基金(JC200718) （JC200718）
