贵州高原草地农业系统动力能流分析

A PRELIMINARY ANALYSIS OF THE POWER ENERGY FLOW OF GUIZHOU PLATEAU AGRO-GRASSLANDS SYSTEM

本文对灼甫示范牧场的农机、人力、畜力三项动力能流的投入数量、方向、效果以及发展趋势做了初步的分析和探讨。农机、人力和畜力、燃油在该场动力能源投入组成分别为３０．８％、１８．６％、０．２％、５０．２％，工业动力能流是生物动力能流投入的４．３倍。分析表明，在南方高海拔山区，高度的机械化作业和单纯的手工业，均不能形成较高的能量利用率，而机械与人力，畜力结合的半机械化作业却具有相对高的能量利用率，增加畜力机械的能量投入，减少燃料能流和人力能流的投入，是灼甫示范牧场比较可行的动力能流输入方式，且能取得较好的经济效益。

This paper describes the amount,direction,effect and tendency of the power energy input from farming machinery manpower and animal power sources into Zhoupu model farm located in Guizhou Plateautl.It was shown that the energy input of machines,manpower,animal power and fuel are 30.8%,18.6%,0.2% and 50.2%,respectively;the energy input of industrial source is 4.3 times higher than that of biological source in the farm.The study also indicates that the highlevel mechanized system is less effective than semi-machanized system,so is the manual working system.The energy input pattern is to use further more animal power and less manpower.