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 tot...