%0 Journal Article
%T Optimizing the external energy input into farmland ecosystems of Deqing County, Zhejiang Province<br>浙江省德清县农田生态系统能量投入的优化
%A YE Xu-Jun
%A <br>叶旭君
%J 生态学报
%D 2001
%I 
%X This paper seeks to discuss the methodology to optimize the external energy input into farmland ecosystems, with an aim to providing realistic guidance to agricultural production. Since the 1960s a large number of studies on energy use in farmland ecosystems have been carried out and it has been shown that energy productivity and efficiency appears to be closely linked to specific characteristics of the land. Experimental work further revealed the sigmoidal relationship between energy input and output under...
%K external energy
%K farmland ecosystems
%K energy input-output model
%K rational range of energy input
%K optimal amount of energyinput
%K optimal pattern of energy input<br>农田生态系统
%K 能量投入产出模型
%K 能量投入合理范围
%K 最优投能量
%K 最优投能结构
%K 浙江
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=FE163E5DB2274E5937319DE98913EC37&aid=6344DB1E5FE16689&yid=14E7EF987E4155E6&vid=659D3B06EBF534A7&iid=59906B3B2830C2C5&sid=6756FAD7BC937C79&eid=E4A9AB4CFA73AF3B&journal_id=1000-0933&journal_name=生态学报&referenced_num=5&reference_num=11