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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3. 植被生产力及其分配对氮输入的响应及其主要机制。正号表示氮输入的促进效应, 负号表示氮输入的抑制效应。 |
Fig. 3. Responses of vegetation productivity and its allocation to nitrogen (N) input and their primary mechanisms. ANPP, aboveground net primary productivity; P, phosphorus. The positive sign means the stimulating effects of N input, and vice versa. |
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