以土地类型及土地合理利用方向为基础进行土地人口承载力初探——以四川省广安县为例

本文以广安县土地类型及土地合理利用方向为基础,定量地研究了各类土地的生产潜力,并依据人均食物消费水平较为客观地指出了广安县的土地人口承载力.

A SEARCH FOR THE POPULATION-LADEN FORCE BASED ON THE LAND TYPES AND AVAILABLE UTILIZATIONS OF THE LAND: Taking Guangan County of Sichuan Province for Example

The principles of classification are established for exhibitions of the classifications system of the land in Guangan County: comprehensive analysises and domaint factors,presentation of the featured identities,and protection of the ecological system of land.Two taxonomic levels,the land and the land genus,of system for land are suggested according to the principles above. The utilization types of the land are deduced from the physical characters of the land which determine available utilizations of the land.The productive potential of land is connected with the factors composed of sunlight,quantity of heat,moisture con- tent,air(CO_2 concentration)and soil.The formula of productive potintial for the land is set up.Each type,taking the pro- ductive potential of land in Guangan County for example,is calculated in terms of the estimated formula and total grain yield. The author analyses the consequences resulted from the study there as follows:per grain of different consumptions,the ratio of population-laden force of the land,the total grain output afforded at maximum by land,which is classified by per grain of reg- ular consumptions,and different accesses of counterbalancing population-laden force of the land and related policies.