Analysis of characteristics of the circular economy of grassland farming

Abstract

Abstract: Circular economy characteristics of grassland agro-ecosystems in Sidunzi county were studied using emergy analysis. 1) The agro-ecosystem’s emergy flux of Sidunzi county was 121.007 6×10¹⁷ sej (solar enjoules), while the emergy flux of the grassland sub-system was 89.27×10¹⁷ sej giving a ratio of 73.77%, which was greater than those of cropping and woodland sub-systems. 2) Among these sub-systems, grassland agro-ecosystems had a proportionally lower emergy investment ratio and environment loading ratio, but had the highest solar emergy transformation rate and a relatively higher emergy-based sustainable index. 3) The potential production of agro-ecosystems could be greatly improved by system coupling between grassland agro-ecosystems and other sub-systems. These results demonstrate that grassland farming occupies a central position in material and emergy cycles within mega-agriculture systems and this is the primary point to realize in the agricultural circular economies. The implementation of grassland farming and extensive systematic coupling are the technical support for promoting development of agricultural circular economies and the inevitable way for adjusting Chinese agricultural structure.

CLC Number:

S812

TANG Jing, LIN Hui-long. Analysis of characteristics of the circular economy of grassland farming[J]. Acta Prataculturae Sinica, 2013, 22(1): 167-175.

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