NDLI: Emergy Analysis and Assessment of Sustainability on the Agro-ecosystem in Heilongjiang Province: As a Case of Xinglong Town

Content Provider	IEEE Xplore Digital Library
Author	Zhang Limin Lei Jia Zhang Xueping
Copyright Year	2011
Abstract	Agriculture is the foundation of national economic development. Agricultural sustainable development is an important part of the social-economic sustainable development and a key historical task of building new socialist countryside in our country. Xinglong town is a typical representation of black cultivated land in Heilongjiang Province. This study presents an ecological analysis of the agro ecosystems of Xing long town for the period from 2005 to 2009, on the basis of Odum's well known concept of emergy in ecological economy. The results indicated that : there was an increasing trend in the total emergy input from 2005 to 2009, among which, purchased supplemented energy accounted for 69.4%, of which chemical fertilizer accounted for a larger proportion. And the proportion of environmental resource was 20.1%and that of renewable organic energy value were 6.8%. Depending on the purchased supplemental energy made the agro ecosystem withstand greater pressure on the environment and the environment load ratio of five-year growth. The net emergy yield ratio was higher than national average and showed a decreasing trend. The environment sustainable index £¨ESI£© was 1.41, which indicated there had greater potential for sustainable development on the agro ecosystem in Xing long town, and showed a declining trend also. The variation of the indices was an obvious indicator for the transformation of agriculture in Xinglong town from traditional to modern pattern and the development of agro ecosystems need to be further improved.
Starting Page	176
Ending Page	179
File Size	160318
Page Count	4
File Format	PDF
ISBN	9781612842783
DOI	10.1109/CDCIEM.2011.377
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-02-19
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Emergy evaluation indices Ecological agriculture Investments Production Cities and towns Soil Black soil Sustainable development Fertilizers
Content Type	Text
Resource Type	Article

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