Systematic Approach to Energy Flow of Huangjia Ercha Watershed Ⅳ.Energy Flow Analysis of Human Community and the Whole Watershed

LI Zhongkui

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Systematic Approach to Energy Flow of Huangjia Ercha Watershed Ⅳ.Energy Flow Analysis of Human Community and the Whole Watershed

- Systematic Approach to Energy Flow of Huangjia Ercha Watershed Ⅳ.Energy Flow Analysis of Human Community and the Whole Watershed
- Bulletin of Soiland Water Conservation Vol. 18, Issue 3, Pages: 29-32(1999)
- 作者机构：
  
  中国林业科学研究院,北京市,100091
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- Published：1999
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LI Zhongkui. Systematic Approach to Energy Flow of Huangjia Ercha Watershed Ⅳ.Energy Flow Analysis of Human Community and the Whole Watershed[J]. Bulletin of Soiland Water Conservation, 1999, 18(3): 29-32.
DOI：

LI Zhongkui. Systematic Approach to Energy Flow of Huangjia Ercha Watershed Ⅳ.Energy Flow Analysis of Human Community and the Whole Watershed[J]. Bulletin of Soiland Water Conservation, 1999, 18(3): 29-32. DOI：

摘要

小流域人类群体子系统，需要的投能主要来自粮食、燃料和食油，它在整个小流域系统中的贡献是为种植业、林业、畜牧业及自身提供人工能量产出及人类尿能量产出，能量产投比为0.151∶1.小流域能量流的系统分析表明，各种作物的光能利用率排序为：胡麻<豌豆<小麦<马铃薯<玉米；乔灌木树种的光能利用率排序为：柠条<柽柳<沙棘<刺槐<毛条<云杉<落叶松<白榆<杨树。通过能流图分析，求出了黄家二岔小流域的环境人口容量，提出了减少牧草播种面积、增加农田面积和增加化肥投能等建议。

Abstract

The energy input needed by human community in the watershed was mainly from grain

fuel and food oil

meanwhile the human community provides the watershed including sub systems of farming

forestry

animal husbandry and itself with human labour power and the organic energy of excrement

etc.

the ratio of output to input of energy is 0.151∶1. Through systematic analysis of energy flow

it is found that the use rate of solar energy of the crops could be ordered as hemp

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