不同水分处理下液体地膜覆盖玉米田土壤环境与产量效应

采用测坑试验研究液膜覆盖夏玉米对土壤温度、水分及产量的影响。结果表明:液膜覆盖使土壤储水能力增强,在0～40cm土层的土壤含水率显著提高;液膜覆盖的土壤增温效果明显,特别是中、低水分处理,增温7.4%左右;在百粒重和行粒数几项产量构成指标中,液膜覆盖较对照优势显著;液膜覆盖在玉米产量和水分利用效率上都有所提高,LFh、LFm和LFl处理的产量分别较对照提高了3.7%、35.4%和57.0%,WUEI分别较对照提高了3.6%、35.7%、57.1%,在WUEET指标上,分别较对照提高了5.3%、8.9%和9.2%。中、低水分的液膜覆盖处理更有利于玉米增产和水分利用效率的提高。

Effects of Liquid Film Mulching on Soil Moisture,Temperature and Yield of Summer Maize Field under Different Water Conditions

The study measured the effects of liquid film mulching on soil temperature,moisture and yield of summer maize field.Studies have shown that the soil water storage capacity in liquid film covering field increased,and in 0-40 cm layer of soil moisture content significantly increased.The soil temperature in liquid film covering field significantly increased,especially those of the intermediate and low-water treatment rose about 7.4 percent.The liquid film covering also had more significant advantage than the control experiment in 100-seed weight and grain numbers of crop rows.The maize yield and water use efficiency have improved,the yield of LF_h,LFm and LF_l respectively increased 3.7%,35.4% and 57.0%,WUEI of LF_h,LF_m and LF_l respectively rosed 3.6%,35.7% and 57.1%,WUEET of LF_h,LF_m and LF respectively increased 5.3%,8.9% and 9.2% over the control experiment.Therefore,the liquid film covering of medium and low soil moistuer is more conducive to maize production and water use efficiency.