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本文从生物圈的能流谈起，探求了人类的生态需求，人口与耕地、牧地的比例关系等等问题。指出必须从生态经济系统这个整体出发，运用大协调学综合各学科的知识，相互渗透，建立人口生态模型，合理控制人口的生态密度。
This article talks about the energy flow of the biosphere and explores such issues as the ecological needs of human beings, the ratio of population to cultivated land and grazing land, and so on. It points out that it is necessary to proceed from the overall eco-economic system, use large coordination to synthesize the knowledge of different disciplines, and infiltrate each other to establish a population ecological model to rationally control the population density.