辽西半干旱区秸秆深还田对土壤含水量、容重及玉米产量的影响

摘要

研究不同量玉米秸秆深还田对辽西半干旱区农田土壤含水量、容重、玉米生长发育及产量的影响.结果表明:与不施秸秆相比,6000,12000,18000,24000kg· hm-2秸秆深还田处理玉米产量分别增产7.60％,9.40％,7.80％和4.51％;秸秆深还田各处理土壤含水量、容重均优于对照,800kg·hm-2处理的土壤墒情优于其他各处理,差异均达极显著水平.秸秆深还田对提高耕层土壤含水量,改善土壤结构,降低土壤容重,促进玉米生长发育及提高玉米产量有重要作用.%The effects of on different doses of straw returning to the deep soil in semiarid region of western Liaoning Province soil moisture content, bulk density, growth and yield of maize were studied. The results showed that the yields of the lands with residual returning of 6000, 12000, 18000 and 24000kg·hm-2, with increases of 7.60%, 9.40%,7.80% and 4.51%, respectively, The treatment of 12000kg·hm-2 exhibited the best effect on soil moisture retention and bulk density. Returning straw to deep soil can raise water use efficiency, improve soil structure and decrease the soil bulk density. It also can promote the growth of maize and increase the yield of corn.