穴播地膜小麦有限灌溉的产量效应及其影响机制  

The Yield Effects and Its Influencing Mechanism for Bunch Planting Wheat Covered With Plastic Film Under Limited Irrigation

作　　者：马忠明[1] 

机构地区：[1]甘肃省农科院粮食作物研究所

出　　处：《干旱地区农业研究》1999年第1期67-71,共5页Agricultural Research in the Arid Areas

基　　金：甘肃省"八五"攻关项目

摘　　要：研究了有限灌溉条件下穴播地膜小麦的产量变化、根系分布、群体动态和源库协调。认为土壤水分下限低于５０％时产量显著下降，相同水分条件下穴播地膜小麦具有明显的增产作用，最高产量所需的土壤适宜水分下限较露地下降１０％。根系分布。Under limited irrigation, the yield changes and influencing mechanism were studied for spring wheat covered with plastic film. The results revealed that: the yield decreased obviously when soil water content was less than 50% of field capacity. Compared to that without plastic film, the yield increased remarkably under the same irrigation and the soil water required for the highest yield reduced 10%. The difference of root distribution, dry matter accumulation and leaf area and inhibition of Souce and Sink were the key mechanism affecting yield.

关 键 词：有限灌溉 地膜小麦 穴播 产量 影响机制 

分 类 号：S274[农业科学—农业水土工程] S512.1[农业科学—农业工程]