Study On Potential Food Productivity And Population Supporting Capacity Of Land In Yulin

huge practice examine and collect information .This Article based on analysed the food production status and population of Yulin Actuality. According to an evaluation on the yield of main grain crops of Yuling in the past years. Furthermore, the maximum grain yield and population supporting capacities in Yu Ling in the years of 2010 and 2020 by means of AEZ(Agriculture Ecology Zone) method. The same time analyses through the Yulin's population, the population changed and alistributed, the forecast 2010 and 2020's development last being femoral built balanced. The key factors for realizing a harmonized and sustainable developing relationship between human beings and the land resources are also pointed out.The main results made in the research are as follows:1. Yulin's have a great potential for food productivity. In the year of 2003 compare production with soil production potentiality, we know that rice's production is half of the production potentiality of ,wheat,bears,minor crop ,the production of them just equal 1/4 production potentiality's. But the kind of potatoes which act as excellent agricultural products just equal 1/4 production potentiality's.2. The year of 2010 product made of Yulin's soil will support three kinds of people.The case rich 1760 thousand, wll-to-do level 1940 thousand, and have enough to eat and wear 2150 thousand. The year of 2020 product made of Yulin's soil will support three kinds of people. The case rich 2190 thousand, well-to-do level 2420 thousand, and have enough to eat and wear 2680 thousand. If after the year of 2020 ,the area of plant will not changed, the production of food stuff reach the standard of soil potentiality. The whole of the Yulin's food production will reach 203 ten thousand t. It will support 3690000-4520000 peoples, this is the limit to people's support. Production potentiality, which use light and right of the people's support. That is a project about use the resource of soil more than 4060000 peoples.3. After the systematic explanation and the fatal population doped .we can know population is increasing population from the 1235100 in 1950 to 4031200 in 2020.During ten years population increased 2796100, increased 39900 in every year.4. Analyze of food productivity potential and soil and population's support, we know that Yulin's food production potentiality is huge. But now people have already exceeded have enough to eat and wear support population in 2020. And then improve the production capacity of the land, strengthen the control on people's growth rate is important measure of balanced the relation of people and land.