摘要
在对灌区来水、作物产量和作物需水量尺度分析的基础上,研究了灌区尺度作物水分利用效率指标,结果表明,冬小麦、夏玉米、棉花不同的生育期对采用哪种水分利用效率指标有直接影响;灌溉、降雨、地下水补给等资料较全时,3种作物都采用WUEET;无降雨资料时,冬小麦可选用WUEi近似代替WUEET;正常年份,夏玉米的WUEP0就是WUEET,干旱年份且需夏灌时,夏玉米WUEET由有效降雨量与灌溉量共同产生;棉花不能用WUEi或WUEP0中的任何一种指标反映其真实的水分利用效率,而只能用WUEET确定。
Based on scale analyzing for water supply situation, crop yield and crop water requirement, the paper studied crops water use efficiency （WUE） indicators in irrigation scale, and results showed that different growing periods for winter wheat, summer corn, cotton had direct impact on which WUE indicators could be adopted; the three crops all adopted field WUE under irrigation, rainfall, underwater recharge data co existing; no rainfall information, winter wheat＇s irrigation WUE might approximately substitute for field WUE. In a normal year, summer corn＇s effective rainfall WUE was its field WUE, while in a drought year and summer irrigation, summer corn＇s field WUE got from the sum of irrigation and effective rainfall. Neither irrigation WUE nor effective rainfall WUE could mirror its actual WUE for cotton, while only can its field WUE determine.
出处
《灌溉排水学报》
CSCD
北大核心
2008年第5期63-66,共4页
Journal of Irrigation and Drainage
基金
国家重点基础研究发展计划子课题(2006CB403406)
