Energy analysis of agricultural ecosystem in Shanghuang village of Guyuan county in Ningxia
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Energy analysis of agricultural ecosystem in Shanghuang village of Guyuan county in Ningxia
Bulletin of Soiland Water ConservationVol. 12, Issue 2, Pages: 33-37(1993)
作者机构:
中国科学院水利部西北水土保持研究所, 陕西杨陵,712100
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Published:1993
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Jia Heng-yi, Chen Guo-liang, Cheng Ji-min. Energy analysis of agricultural ecosystem in Shanghuang village of Guyuan county in Ningxia[J]. Bulletin of Soiland Water Conservation, 1993, 12(2): 33-37.
DOI:
Jia Heng-yi, Chen Guo-liang, Cheng Ji-min. Energy analysis of agricultural ecosystem in Shanghuang village of Guyuan county in Ningxia[J]. Bulletin of Soiland Water Conservation, 1993, 12(2): 33-37.DOI:
Energy analysis of agricultural ecosystem in Shanghuang village of Guyuan county in Ningxia
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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