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。
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 0.1511. Through systematic analysis of energy flow, it is found that the use rate of solar energy of the crops could be ordered as hemp<pea<wheat<potato<corn, and that of trees and shrubs asCaragang korskinskii<Tamarix chinensis<Hippophae rhamnoides<Robinia pseuoacacia<Caragana microphylla<Picea asperata<Larix<Ulmns pumila<Populus. Through analysing the energy flow diagram, the environmental population capacity of Huangjia Ercha watershed was estimated. It is suggested to reduce sowing area of grass, increase farming area and energy input of chemical fertillizers.
出处
《水土保持通报》
CSCD
北大核心
1999年第3期29-32,共4页
Bulletin of Soil and Water Conservation
基金
中国博士后科学基金
关键词
人类群体子系统
光能利用率
能流图
human community
use rate of solar energy
energy flow diagram
