草地系统与农田系统的能流特征及分析

TIIE CHARACTER AND ANALYSIS OF ENERGY FLOW IN GRASSLAND AND FARMLAND SYSTEMS

本文调查分析了新疆阜康县4户草地(养殖)系统和5户农田(种植)系统的能流特征及其能量产出和投入。草地系统总投能828.48MJ/ha,其中有机能投入为511.39MJ/ha,经济能量产投比为1.325,其中纯牧业的经济能量产投比为0.877。草地系统具有以长流程为主和较小的能流通量的能流特征。农田系统总投能为58205.95MJ/ha,是草地系统的62.64倍,其中有机能投入为4935.53MJ/ha,经济能量产投比为1.158。农田系统具有以短流程为主和较大的能流通量的能流特征。

Energy flow character of 612 ha.grassland that belongs to 4 herd owners and 42 ha farmland that belongs to 5 farmers had been observed in Fukang County,Xinjiang.It showed that total energy inputs in grass- land system was 828.48M J/ha.and 511.39MJ/ha.of this was in form of organic energy.The economical energy ratios between output and input was 1.325,and 0.877 of that was due to simple animal hus- bandry.More energy chains dominantly and small energy flux seem to be basic feature for energy flow in grassland system.It also showed that total energy inputs in farmland system was 58205.95M J/ha.this was 62.64 times as much as grassland system,and 4955.53MJ/ha.of that was in form of organic energy.The economical energy ratios between output and input was 1.158.for energy flow in farmland system.Less energy chains dominantly and larger energy flux were found in comparison with that in grassland system.