晋东豫西旱农试验区农业生态系统能流特征

以晋东豫西旱农试验区－－山西省寿阳县宗艾镇宗艾村农业生态系统为研究对象，分析了农田、果园、林业和畜牧业等亚系统能量流动途径、人工辅助能输入、能量产出，能量结构偏差以及能量转化效率等能流特征。结果表明：（１）由于能量投入低，尽管利用效率较高，但能量产出仍处于低水平阶段。农田生态系统的有机能投入和人工辅助能总投入很低，低于１９７９年全国平均水平，但能量产投比较高，增加人工辅助能投入、提高有机能投入比例

ENERGY FLOWING OF AGRICULTURAL ECOSYSTEM IN DRYLAND FARMING EXPERIMENTAL SITE BETWEEN EASTERN SHANXI AND WESTERN HENAN PROVINCE

Taking the Zongai village,the dryland farming experimental site between eastern Shanxi and western Henan Province,as study unit,this paper studied the energy flowing in different sub systems of crop field,orchard,forest and animal husbandry.The ways of energy flow,structure of supplementary energy input,composition of the input and output energy for different sub systems,and the relation of energy flow in sub systems and energy transform efficiency were analyzed. The results showed that(1)organic and total supplementary energy input of agriculture field system was lower than mean level of the whole country in 1979; The ratio of energy output to input was high; The input of organic energy could greatly increase energy transformation efficiency and energy output.On the contrary,the input of inorganic energy could decrease efficiency;(2)the deviation of energy between primary and secondary production was too large. The waste of organic energy provided by primary production system was much serious. Developing animal husbandry would be an effective way to ordinate the relationship of cropping and raising system and increase energy output.