秸秆覆盖下超高产夏玉米农田产量和土壤水分的动态变化

试验于2010年在山东农业大学农学实验站完成,设3种覆盖处理,分别为0（D0）,0.6（D0.6）,1.2kg/m2（D1.2）,研究了超高产条件下秸秆覆盖对夏玉米农田产量和土壤水分动态变化的影响。结果表明,秸秆覆盖条件下,D0.6和D1.2处理的籽粒产量分别为1 328.8,1 204.9g/m2,均达超高产水平,且分别比D0处理提高了12.1%和1.8%。播种到灌浆期间,秸秆覆盖可显著增加超高产夏玉米农田0-90cm范围内的土壤水分含量;灌浆期以后,各覆盖处理对土壤水分含量的影响逐渐减小。D1.2和D0.6处理分别比D0处理的蒸散量增加了7.1%和9.2%,从而使水分利用效率（WUE）降低。实验表明,在黄淮海夏玉米主产区,秸秆覆盖显著增加籽粒产量,是实现夏玉米超高产的有效手段之一,但并没有显著提高WUE。

Grain Yield and Soil Water Content of Super-high-yield Summer Maize Under Straw Mulching

The experiment was conducted at the agronomy experimental station of Shandong agricultural university during the summer maize growing season in 2010.The objective was to investigate the effect of straw mulching on grain yield and soil water dynamic change of super-high-yield summer maize.Field experiments involving straw mulching with 0,0.6,1.2 kg/m2(D0,D0.6,D1.2,respectively) were conducted.The results showed that under the conditions of different straw mulching,the grain yield in case of D0.6 and D1.2 wer...