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草地群落多样性和生态系统碳氮循环对氮输入的非线性响应及其机制
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Nonlinear responses of community diversity, carbon and nitrogen cycles of grassland ecosystems to external nitrogen input
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图4. 土壤呼吸对氮输入的响应及其主要机制。 |
Fig. 4. Responses of soil respiration to nitrogen (N) input and their primary mechanisms. |
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