旱地地膜冬小麦播前底墒对产量效应的研究

Effect of soil stored water before sowing on yield of winter wheat mulched with plastic film in dryland

摘要: 多年定位试验与人工创造播前底墒研究结果表明，旱地地膜冬小麦产量与播前底墒有显著相关性，随底墒的提高，地膜冬小麦籽粒平均增产40．8％，蒸腾速率、光合速率增加，叶面积指数增大，提高夏休闲期土壤蓄水效率。

Abstract: Experiment of different stored water of soil before sowing were conducted in dryland of east Gansu．The results show that the winter wheat yield has interrelated significantly with the stored water of soil before sowing in 0-200cm soil layers．With the increa sing of the soil stored water，the yield of winter wheat increases to 40．8％，the transpiration rate，photosynthetic rate，leaf area index，and efficiency of stored water in summer fallow raise．