The emergy of metabolism in different ecosystems under the same environmental conditions in the agro-pastoral ecotone of northern China

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• 作者：Xiajie Zhai^a ; ^b ; Ding Huang^a ; ^b ; Shiming Tang^a ; Shuiyan Li^a ; Jianxin Guo^a ; Yuejuan Yang^a ; Hongfei Liu^a ; Jinsheng Li^a ; Kun Wang^a ; ^b ; ^{wangkun@cau.edu.cn}
• 关键词：Agro-pastoral ecotone ; Emergy evaluation ; Ecosystem ; Grassland ; Farmland
• 刊名：Ecological Indicators
• 出版年：2017
• 出版时间：March 2017
• 年：2017
• 卷：74
• 期：Complete
• 页码：198-204
• 全文大小：1096 K
• 卷排序：74

文摘

The emergy inputs and outputs of ten ecosystems show obvious differences in the agro-pastoral ecotone of northern China. Rain input constituted the highest renewable natural resource emergy. Purchased emergy input is the direct cause of the development of the ecosystems under the same environmental conditions. Groundwater was the most important non-renewable purchased energy for the production of economic crops. Because of low environmental load and high sustainability, rain-fed artificial grassland has a high development potential.