摘要： 本文从研究坝上旱区主要作物自然降水生产潜力出发,探讨了该地区的耗水系数和降水利用率.1987～1989年在张北坝上旱原进行了定点定位试验,获得较丰富的资料.应用联合国粮农组织Wageningen法,对一系列参数进行订正后,建立起适合当地的生产潜力概算公式,经田区试验检验,证明其潜力值是可靠的和可以实现的.并对这些潜力值进行耗水系数和降水利用率的计算,定量地分析了不同气候类型常年降水的利用状况,从而为有效地开发和利用坝上旱区降水资源提供了理论依据.

关键词: 坝上旱原, 生产潜力, 耗水系数, 降水利用率

Abstract: A location test was made in Zhangbei county, on the Bashang Highland in the northern part of Hebei province from 1987 to 1989 in order to get the coefficients of both water consumption and precipitation utilization in this region, and a great deal of data was accumulated. After a series of parameters were corrected, a budget estimation formula for productive potentialities suitable to local conditions was established with FAO Wageningen method. It was proved in the field test that the potential value was reliable and feasible. The productive potential value of natural precipitation, and coefficients of both water consumption and precipitation utilization were calculated On this basis the different climate types and the utilization situation of precipitation throughout the year in this region were analysed. Therefore, the theoretical basis was provided for effective development and utilization of the precipitation resources in this region.

Key words: Bashang Highland, Productive potentialities, Water consumption coefficient, Precipitation utilization coefficient