Energy analysis of agricultural ecosystem in Shanghuang village of Guyuan county in Ningxia
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    Abstract:

    The energy analysis in the agricultural ecosystem indicates that energy input is increased stablly, Althong both ra-tion of energe output and output input are fluctuated,they trend towards increase in total. The ratio of energy outputto input is changed from 0. 44 to 1. 93 with an average of 1. 36. Input of organic manure is increased with the input ofinorganic fertilizer. Increase of supplementary energy mainly chemical fertilizer produces a soundably ecological andSocial benefit regardless of in the year with plenty of rainfall of with an averagy amount of preciptation. Meanwhile,the agricultural ecosystem in Shanghuang village possess strong capabity to resist natural calamities.

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贾恒义,陈国良,程积民.固原县上黄村农业生态系统能量分析[J].水土保持通报英文版,1993,(2):33-37

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History
  • Received:August 10,1992
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  • Online: November 28,2014
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