长期氮沉降对杉木人工林叶、枝氮磷养分再吸收的影响
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Responses of nitrogen and phosphorus resorption from leaves and branches to long-term nitrogen deposition in a Chinese fir plantation
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图5. 2010年成熟绿叶和衰老叶的N、P含量(平均值+标准误差)。N1、N2、N3, 施氮量分别为0、60、120、240 kg·hm-2·a-1。 |
Fig. 5. N and P content of mature living and senescent leaves in 2010 (mean + SE). N0, N1, N2, N3, nitrogen addition 0, 60, 120, 240 kg·hm-2·a-1, respectively. |
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