摘要
在河北省半干旱地区不同类型区的藁城、临西、望都灌溉试验站。采用田测法进行冬小麦节水灌溉制度试验研究,结果表明,在灌水次数和水量较少的情况下,冬小麦产量与耗水量成正比,其最高产量的相应耗水量为适宜耗水量,超过适宜耗水量,再增加灌水次数和水量,产量下降,根据适宜耗水量,经济灌溉定额及亏水情况下的减产系数,确定不同类型区的灌水依据和节水灌溉制度。示范与推广证明,推荐的冬小麦节水灌溉制度是可行的,在水资源相对丰富区,平均亩节水92m^3,增产率为8.7%。
The field measurement method was used in conducting experimental researchon water-saving irrigation system for winter wheat in various types of regions,including Gaocheng,Linxi and Wangdu,in the semiarid areas in Hebei Provin-ce.The results show that under the condition of limited irrigation time andquantity,the yield of winter wheat is proportional to water consumption.Wateruse corresponding to the aximmum yield is called the optimum water consump-tion beyond which the yield decreases instead when irrigation time and quan-tity are increased.According to the economic irrigation quota determined bythe optimum water consumption and yield-decreasing coefficient under waterdeficit,water-saving irrigation system in different climatic divisions can be de-termined.It is also shown through the demonstration and large-scale extensionthat this water-saving irrigation system recommended is feasible in areas wherewater resources are plentiful,and the average quantity of 92 cubic meters per mucan be saved with a yield increas of 8.7%.
出处
《干旱地区农业研究》
CSCD
北大核心
1991年第2期85-93,共9页
Agricultural Research in the Arid Areas
关键词
小麦
节水
灌溉
干旱地区
河北
Irrigation system
winter wheat
water consumption
irrigation production function
semiarid area in Hebei
