JOURNAL OF NATURAL RESOURCES ›› 2005, Vol. 20 ›› Issue (3): 340-346.doi: 10.11849/zrzyxb.2005.03.004

• Special Column:Celebration of the 70th Anniversary of IGSNRR, CAS • Previous Articles     Next Articles

Relationship between Land Productivity and Land Use Structure

LI Xiao-juan, NI Jin-ren, LI Zhen-shan, HAN Peng, LI Tian-hong   

  1. Department of Environmental Engineering,Peking University,Key Lab of Water and Sediment Sciences, Ministry of Education,Beijing 100871,China
  • Received:2004-09-10 Revised:2005-01-10 Online:2005-06-25 Published:2005-06-25

Abstract: Severe soil erosion and low land productivity have become serious ecol ogical problems in the Loess Plateau region.This paper focuses on the relationsh ip between land use structure and land productivity through a case study at Wang jiagou watershed in western Shanxi. It is indicated that there are remarkable linear relevant relations betwee n the potential productivity and the land use structure index (SI).The potential productivity would increase with the increase of SI.Another index PrI is introd uced and well defined as the rate between the disparity of the potential product ivity and actual productivity.The PrI and SI have good linear positive correlati ons.The larger the PrI and SI,the more pains to increase actual yield.The mechan ism on how the landuse structure affecting the land productivity is revealed. Soil erosion would be decreased with the increase of SI.As a result,the l oss of soil fertility can be improved.Therefore,land use structure can be adjust ed properly so as to improve the land productivity.Therefore, wise planning for regional land use structure and conservation of soil and water would be helpful to gain more crops.Consequently,both economic and ecological benefits could be o btained in the same process.

Key words: land use structure index (SI), soil erosion, land productivity (PrI)

CLC Number: 

  • F301.2