旱塬地膜冬小麦增产机理研究初报  

A Study on Yield increasing Mechanisms of Winter Wheat Mulching with Plastic Film in Dry land Areas

作　　者：王勇[1] 樊廷录[1] 崔明九[1] 

机构地区：[1]甘肃省农科院旱农所

出　　处：《西北农业学报》1998年第4期43-48,共6页Acta Agriculturae Boreali-occidentalis Sinica

基　　金：国家"九五"科技攻关

摘　　要：对不同年型地膜冬小麦增产内在机制的研究表明，旱地冬小麦全生育期覆膜穴播具有：①明显的抗旱、保水及增产效果，特旱年及旱年最大增产率分别达１５７．６５％和６２．８５％，ＷＵＥ提高４７．５％～１３７．８％和３６．２％～６０．４％；②植株个体、群体发育良好，蒸腾速率增大，光合速率显著提高，合成源扩大；③有利于提高地温，全生育期０～５ｃｍ土层≥０℃地温较露地（２０５６．１℃）提高１０．４％，１ｍ土层根系重量增加０．３％～１３．８６％；④边行优势明显，千粒重和穗粒数分别增加０．３～２．０ｇ和１．３～１４．６粒。The mechanism of increasing the yield has been researched and analyzed for mulching with plastic film in different year types. The experiment results show that winter wheat with plastic film mulching in whole growing seasons has significant effected on water conserving, drought resistance and yield increasing. The yield increased by 57.65%, 62.85% in serious drought and drought years, WUE improved 47.5%￣137.8%, 36.2%￣60.4%; individual and group plants development are better than no mulching. The transpiration and photosynthetic rate are significant raises; Mulching with plastic film in 0￣5 cm soil temperatures (≥0℃) is increased to 2 056.1℃ in whole growth period which goes up 10.4%. Kernels per spike and TKW increase 1.3￣14.6 and 0.3￣2.0 g.

关 键 词：旱塬 冬小麦 增产机理 地膜覆盖 

分 类 号：S512.101[农业科学—作物学] S316