ENERGY FLOWING OF AGRICULTURAL ECOSYSTEM IN DRYLAND FARMING EXPERIMENTAL SITE BETWEEN EASTERN SHANXI AND WESTERN HENAN PROVINCE
晋东豫西旱农试验区农业生态系统能流特征

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.