According to the actual productivities of fragile agro-ecosystems in Mu Us Sandy Land and with Yuyang District,a typical county there,as its subject,the study investigated the evolution pattern in the primary productivity,secondary productivity and the coupling degree between farming and animal-raising in typical regions of Mu Us,following the coupling theory about compound ecosystem and the energy theory and using relevant analytical methods.To draw a conclusion in agro-ecosystems coupling degree between f...
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