摘要
华北平原的冬小麦应用喷灌与常规畦灌相比 ,有明显改善灌溉水利用效率的作用。其主要原因在于 :1)喷灌尽管每次灌水量较少 ,但其土壤贮水量的下降速率明显低于畦灌 ;2 )喷灌使灌溉水大部分集中于0～ 60 cm土层 ,有利于冬小麦的水分利用 ;3)喷灌可以在不降低光合的前提下减小作物的蒸腾速率 ,在喷灌的各生育期间作物耗水量较畦灌减少 ,耗水强度也相对较小 ;4 )喷灌可以在产量基本不减或稍有提高的情况下节约大量灌溉水 。
Compared with border irrigation, sprinkle irrigation could improve WUE of winter wheat in Hua Bei plain. The main reasons concluded as below: 1)Although less water was applied with sprinkle irrigation than border irrigation, the decrease soil moisture pool was obviously slower than that of border irrigation. 2)Sprinkler irrigation concentrated water mostly in the soil layers of 0～60cm, which was accessible to winter wheat. 3)The transpiration rate in sprinkler irrigation treatment was lower while photosynthesis rate was not decreased, and water consumption of sprinkler irrigation and intensity were less than that of border irrigation in different growing period. 4)Sprinkle irrigation could save plenty of irrigation water while yield was not decreased or even increased slightly, so sprinkler irrigation could improve WUE and IWUE.
出处
《中国农业大学学报》
CAS
CSCD
北大核心
2001年第5期30-34,共5页
Journal of China Agricultural University
基金
国家九五攻关专题资助项目 (98- 0 15 - 0 1- 0 4)
关键词
冬小麦
喷灌
畦灌
水分利用
winter wheat
sprinkle irrigation
border irrigation, water use
