Climate-Soil Productivity and Potential Population Supporting Capacity of Cropland in Sichuan Province

  • Institute of Mountain Hazards and Environment, Chinese Academy of Science & Ministry of Water Country, Chengdu, Sichuan 610041

Received date: 2003-01-10

  Revised date: 2003-04-22

  Online published: 2004-01-20


Cropland potential productivity in Sichuan Province is estimated by soil quality index. Most soil quality index is less than 0.70. The area of the first, second and third grade cropland is 185 447 ha and accounts for 42.5% of the total cropland in Sichuan, and the area of the fourth grade and others grade with low yield makes up more than 50% of the total (the second time general investigation of soil resource of China). The climate-soil productive potentiality of Sichuan are 10.7?1010 kg and 69.8? 109 kg with the area cited from the second time general investigation of soil resource of China and statistic of 2001, respectively. According to the climate-soil productive potentiality of Sichuan, the food supply will fail to meet the people's need and will lack 52.4?108 kg and 16.8?107 kg using the linearity model and the exponent model to forecast the population and the area of cropland in 2040, the population of 3863400-12012000 will suffer from shortage of food. If using the actual production capacity to calculate, it is concluded that the population bearing capacity will be overloaded from 2000.In the next 50 years, 8874259-29822803000 kg of grain will be short and the population of 203654000-68401000 preson will be overloaded in Sichuan Province. The result showed that overloaded population-bearing capacity and the shortage of food will not be avoided and the situation will also be austere.

Cite this article

HE Yu-Rong, ZHOU Hong-Yi, ZHANG Bao-Hua, GONG A-Du . Climate-Soil Productivity and Potential Population Supporting Capacity of Cropland in Sichuan Province[J]. SCIENTIA GEOGRAPHICA SINICA, 2004 , 24(1) : 20 -25 . DOI: 10.13249/j.cnki.sgs.2004.01.20


[1] 陈惠,蔡文华,张春桂,等.福建省粮食作为气候-土地生产力及人口承载量的研究[J].资源科学,2002.24(1),62~67.
[2] 张安录.2000年湖北耕地人口承载量研究[J].长江流域资源与环境,1995.4(2),114~119.
[3] Population Supporting Capacities of Land in the Developing World[M].FAO.FPA/INT/153,1982.
[4] 四川省国土局/四川省土地资源调查办公室编.四川省土地资源[M].成都:四川科技出版社.1999.371~385.
[5] 四川省农业厅土壤普查领导小组.四川土壤[M].成都:四川科技出版社,1995.
[6] 四川省农业厅土壤普查领导小组.四川土种志[M].成都:四川科技出版社,1993.
[7] 李燕清.青海省土地承载力研究[A].中国科学院成都山地所编:山地资源开发与持续发展[C].成都:成都科技大学出版社,1997.347~353.
[8] 王卫,李秀彬.中国耕地有机质含量变化对土地生产力影响的定量研究[J].地理科学, 2002, 22(1): 24~28.