降雨量和土壤氮含量对半干旱沙质草地生产力的影响 |
张晶, 左小安, 吕朋 |
Effects of soil nitrogen content and rainfall on vegetation productivity in semi-arid sandy grassland |
Jing Zhang, Xiaoan Zuo, Peng Lv |
图7 影响沙质草地地上生物量效应路径的结构方程模型 |
Fig.7 Structural equation model illustrating the effect pathways influencing aboveground biomass in sandy grassland |
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