冬小麦不同水分处理下液膜覆盖的节水增产效应分析

主要探讨了液体地膜覆盖对冬小麦生长发育、节水增产效应等方面的影响。结果表明,在叶面积指数方面,当灌水下限为田持的50%时,抽穗期以前,液膜覆盖的叶面积指数均较对照偏大,之后则偏小,灌水下限为田持的80%时,整个生育期内液膜覆盖较对照偏大。在分蘖动态方面,返青期到拔节期这一阶段,液膜覆盖较对照分蘖数明显增多。当灌水下限为田持的60%时,液膜覆盖能明显提高冬小麦的产量及水分利用效率,并且此处理下,产投比增加,冬小麦经济效益显著提高。研究认为,液膜覆盖使得冬小麦在适宜灌水条件下显著达到节水增产的效果。

Analysis on the Water-saving and Yield-increasing Effects of Winter Wheat Liquid Film Mulching under Different Soil Moisture Treatments

This paper mainly studied the effects of liquid film mulching(LF) on growth,water-saving and yield-increasing of winter wheat.The results showed that under the lower irrigation limit of 50% field capacity,leaf area index(LAI) of LF are higher than that of CK before the heading stage,while it is relatively small after the heading stage;but under the lower irrigation limit of 80% field capacity,LAI of LF are higher than that of CK in the whole growth period.The tiller number of LF increase significantly as that of CK when returning green stage to the second peak.The yield and water use efficiency of liquid film mulching increase significantly under the lower irrigation limit of 60% field capacity,meanwhile,the net income of farmers and the ratio of output to input has been increased.The study indicates that liquid film mulching is effective for water-saving and yield-increasing of winter wheat.