摘要
通过定点定位试验 ,比较了喷灌与常规畦灌条件下农田生态环境、冬小麦光合速率和蒸腾速率的日变化特征以及不同水平的水分利用效率。结果表明 ,喷灌可以明显改善农田生态环境 ,减少作物蒸腾驱动势 ,使气孔阻力增大 ,最终导致蒸腾速率降低 ;在土壤水分相近条件下 ,喷灌条件下叶片的光合速率明显高于畦灌的光合速率 ,而蒸腾速率明显低于畦灌的蒸腾速率 ;喷灌小麦叶片水平水分利用效率和产量水平的水分利用效率均高于畦灌 ,表明在华北平原喷灌是改善农田生态环境和发展节水农业的一个有利措施。
Based on the field experiments, the daily variations of photosynthesis rate and transpiration rate and water use efficiency(WUE) were compared on the condition of sprinkle irrigation and border flooding irrigation. The results showed that the field ecological environment could be obviously improved on the condition of sprinkle irrigation, the transpiration force potential was reduced and the transpiration rate could be finally decreased. The photosynthesis rate on the condition of sprinkle irrigation was higher than that on the condition of border flooding irrigation while the soil moisture content was similar. The WUE at leaf level and production level on the condition of sprinkle irrigation was higher than those on the condition of border flooding irrigation. The results showed that the sprinkle irrigation was an effective measure to improve the field ecological environment and to develop water saving agriculture.
出处
《农业工程学报》
EI
CAS
CSCD
北大核心
2000年第3期35-37,共3页
Transactions of the Chinese Society of Agricultural Engineering
基金
"九五"国家科技攻关项目 !(96-015-01-04)
关键词
冬小麦
喷灌
农田生态环境
生理特征
试验研究
winter wheat
sprinkle irrigation
field ecological environment
water use efficiency(WUE)
