摘要
在自然大田和人工防雨池栽条件下，研究了限量灌水对冬小麦光合性能和水分利用的影响。结果表明，田间土壤耗水强度以拔节至挑旗期间为最大，此期间限量灌水较显著地减缓了冬小麦生育后期光合面积的衰减，使叶片的气孔阻力降低，蒸腾强度升高，群体和叶片的光合速率均升高，改善了光合性能。
The effects of limited irrigation on photosynthetic capacity and water utilization of winter wheat were studied in natural field and rainfall proof trough cultivation.The maximum water consumption by winter wheat per day was in the jointing stage and to flag leaf stage. Limited irrigation can inhibite decrease of leaf area in winter wheat in the period and decrease stomatal resistance of leaves and increase photosynthetic rate of colony and leaf,resulting in photosynthetic capacity was better,water utilization efficiency for economic yield was increased.
出处
《华北农学报》
CSCD
北大核心
1997年第2期65-70,共6页
Acta Agriculturae Boreali-Sinica
基金
国家自然科学基金
关键词
限量灌水
冬小麦
光合性能
水分利用率
Limited irrigation
Winter wheat
Photosynthetic capacity
Water utilization efficiency
