气候、土壤和人的生产劳动是构成农业生产力的三大因素。其中土壤是相对稳定的因素,可以通过人的劳动逐步定向改变。气候则在时间和空间上的变化都很大,而且难以人为改变,故其对产量的影响极大。作物种和品种的选择,播栽期的确定,耕作制度等,在很大程度上是适应和利用光、温、水条件。各地气候不同,光、温、水资源的强度,数量及其季节分配不同,农业气候生产潜力亦不相同。农业气候生产潜力是评价农业气候资源的判据之一。研究它不仅为制定农业发展规划提供农业气候依据。又能根据实际产量和潜在产量之间的差距,分析和设法改变限制产量提高的环境因素,努力使实际产量接近潜在产量,为向自然界索取更多的农产品提供科学依据。

The potential productivity of photo-energy,photo-therm and climate (light,temperature and water),and their availabilities in Jiangsu province are evaluated on the basis of survey.It is shown that the agroclimatic potential productivity would be twice to four times of the present yield.It is possible to raise utilization level for the agroclimatic production-potential of whole province from present rate of 16-55% up to 65-75%,and double the food production by the end of this century.Three climatic-production regions and eight subregions are divided into based on the magnitude of agroclimatic production potential and its rate of availablity.