黄家二岔小流域能量流的系统分析 Ⅲ.林业和畜牧业子系统能量流分析

计算了毛条等５种灌木和杨树等４种乔木在整地，栽培，抚育管理和采伐等各个环节的人工，畜工和机具投能量，对各种林木的活立木和薪材产能做了对比分析，分析了沙打旺，紫花苜蓿和红豆草生产的人工种子投能和畜力，幼畜，鸡蛋和畜禽类等产能，在分析家畜，家禽投能结构与产能关系的基础上，对畜牧业子系统能量流做了系统分析，建议发展养羊和畜牧，限制和减少兔，鸡的饲养量。

Systematic Approach to Energy Flow of Huangjia Ercha Watershed III.Energy Flow Analysis for Forestry and Animal Husbandry

The energy input from human, animal and machines in soil preparation, planting cultivation and management and cutting, etc.to 5 kinds of shrubs and 4 of trees were calculated, then the comparison of energy input with output of standing trees and/or fuel wood was conducted. The production of Astragalus adsurgens Pall., Medicago sativa L., Onobrychis visiaefolis Scop was analysed, in energy input through human labour and seed and energy output through grass, fuel and seed. The energy input to animals through raise and management and their output of energy through animal power, young animal, eggs and excrement of animals were calculated. Having studied energy output with energy input structure of the animals, a systematic analysis to energy flow for the sub-system of animal husbandry was made. It is suggested to develop the number of sheep and cattlas but limit and decrease the number of rabbit and chikens.