摘要
研究不同土壤水分状况下秸秆覆盖对夏玉米生长发育指标、产量和水分利用效率的影响。试验在防雨棚下的测坑中进行,设计了秸秆覆盖和土壤水分控制下限(占田间持水率的75%,65%和55%)两个因素,分析夏玉米生长指标、产量及水分利用效率的变化规律。结果表明,秸秆覆盖对夏玉米生长发育有促进作用,在不同的水分状况下,覆盖处理的夏玉米叶面积指数、产量和水分利用效率均优于不覆盖处理。中水分条件覆盖处理下的夏玉米产量较对照条件下的高水分夏玉米产量无显著降低,而且其水分利用效率最高。建议在夏玉米覆盖生产方式中采用中水分灌溉方式,可以达到节水高产的目的。
The experiment was conducted to study the effect of growth indexes,yield and water use efficiency （WUE） of summer maize under three different soil moisture treatments （75%,65%,55% of field capacity） of straw mulching.The experiment was carried out in test-pit under rainshelter and designed two factors of straw mulching and soil moisture conditions,the changing patterns of growth index,yield and WUE of summer maize were analyzed.The results showed the leaf area index （LAI）,yield and WUE under straw mulching were higher than that of no mulching.Compared to the high soil moisture （75% of field capacity）,the yield of summer maize under the middle soil moisture treatment （65% of field capacity） was not significantly reduced,while it had the highest WUE in all treatments.In a conclusion,in order to achieve the purpose of water-saving and high yield,the lower limit of soil moisture was controlled at the 65% of field capacity,which was recommended for summer maize under straw mulching.
出处
《中国农学通报》
CSCD
北大核心
2011年第15期189-193,共5页
Chinese Agricultural Science Bulletin
基金
"十一五"国家支撑计划(2006BAD11B02)
