河北省农业气候生产潜力的探讨

本文探讨河北省农业的气候生产潜力,是假设作物品种、土壤的理化性状以及耕作技术都适宜的情况下,在光、温、水等气候因素的作用下所能达到的最高产量。在考虑水分对光温生产潜力限制时,引入作物供水量与需水量之比作为水分订正函数 g=(R+W—f—D)/ET,为鉴定作物水分供求关系的客观指标。其中:R 为降水量,W 为浅层地下水补给量,f 为径流量,D 为对浅层地下水补给量,ET 为作物需水量。计算了各地小麦、夏玉米、棉花等气候生产潜力。

APPROACH TO THE PRODUCTIVE POTENTIALITIES OF AGRICULTURAL CLIMATE IN HEBEI PROVINCE

In this paper,the agroclimatic productive potentialities of Hebei Province are studied.Assuming the variety of crop,the physico-chemical nature of soil and the ploughing techniques are keeped in good fit.Under the action of climatic factors such as light,temperature and water,the highest production is the agroclimatic productive potentialities.Considerating that the productive potentialities of light- temperature are limited by moisture,the ratio of crop water supply to water requirement is inducted as a moisture redressing function:g=(R+W-f-D)/E_T which is used as a objective standard for appreciating the relation between moisture supply and demand of crop.Where R is the precipitation;W is the recharge from the ground water;f is the runoff;D is the charge to the ground water;E_T is the water requirement of crop.The author have computed the climatic productive potentialilities of regions for wheat,corn,cotton etc.