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谢花林、何亚芬等: Spatio-temporal difference analysis of cultivated land use intensity based on emergy
 
[发布时间:2016-02-29 08:35:36] [访问量:]


 

SCI期刊Journal of Geographical Sciences》(已接受)

 

Spatio-temporal difference analysis of cultivated land use intensity based on emergy in the Poyang Lake Eco-economic Zone of China

XIE Hualin1, HE Yafen1, ZOU Jinlang2, Wu Qun2

1. Co−innovation center for institutional construction for Jiangxi eco−civilization, Jiangxi University of Finance and Economics, Nanchang 330032, China;

2. Institute of Land Management, Nanjing Agricultural University, Nanjing 210095, China

Abstract: This paper introduces a method for measuring cultivated land use intensity using farm input indexes with corresponding emergy terms, which are applied to the Poyang Lake Eco-economic Zone as a research object. This paper analyzes time series data of labor intensity, agricultural machinery intensity, fertilizer intensity, pesticide intensity and agricultural film intensity in the zone from 2000 to 2010. Then, taking the emergy requirements of the five input indexes as the foundation, the total temporal and spatial changes in cultivated land use intensity in the study area are analyzed. The results are obtained as follows: (1) Over a period of 10 years, the cultivated land use intensity has increased exponentially in the Poyang Lake Eco-economic Zone; agricultural machinery intensity has been the largest proportion of the total inputs, comprising more than 99.50% and increasing year by year, which indicates that agricultural mechanization is a basic trend in agricultural development in the Poyang Lake Eco-economic Zone. (2) The total number of counties belonging to the moderate and low intensity cultivated land use categories is largest, while the number of counties belonging to the high-intensity cultivated land use and extensive cultivated land use categories is the smallest. (3) This zone can be divided into five areas: an eastern area of high-intensity cultivated land use, a central and eastern area of low-intensity cultivated land use, a central area of low-intensity cultivated land use, a southern area of moderate-intensity cultivated land use, and a northern area of moderate-intensity cultivated land use. (4) The counties which had a coordinated development between cultivated land use intensity and their economic development increase year by year, and socio-economic development had increasingly obvious effects on the cultivated land use intensity. Finally, this paper presents suggestions for the development of cultivated land use intensity in the Poyang Lake Eco-economic Zone, especially for different levels of intensity among counties.

Key words: cultivated land; land use intensive; emergy term; Poyang Lake Eco-economic Zone


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