本文采用屡次分析法,运用1∶10万TM卫星图象对黑龙港类型区(沧州区域为例)农业生产水平类型划分的结果,分析计算了该区各种类型土地(高、中、低产田)的各级生产潜力和粮食作物生产潜力。得出沧州区域提高粮食生产潜力着眼点在高、中产田,主要措施是增加能量投入,合理用水,改良土壤。

On the basis of the estimation of the light-temperature potential productivity for different food crops (mainly wheat and corn), this paper according to the maps of the types of agricultural production level and the saline-alkali soil distribution compiled by using the TM satellite images (1:10000), gives corrections of irrigation, soil, fertilizer and agricultural technology level of the high-, middle-, and low-yield land by multihierarchical analysis. It further calculates the potential productivity at each level of different land types and crop potential productivity.This result shows that light-temperature potential productivity is 1470-1580kg/mu; the natural climatic potential productivity is only about 350 kg/mu, and the irrigation climatic potential productivity is clearly enhanced. The restrictive factors of soil and the irrigation condition are the main causes which lead to the complex regional distribution of the land potential productivity. It also shows that economical water utilization, more input of energy and better management are necessary to increase the productivity of the high- and middle-yield land.