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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沈芳芳,李燕燕,刘文飞,段洪浪,樊后保,胡良,孟庆银
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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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SHEN Fang-Fang,LI Yan-Yan,LIU Wen-Fei,DUAN Hong-Lang,FAN Hou-Bao,HU Liang,MENG Qing-Yin
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表2 基于双因素方差分析得到的组分、氮沉降水平及其交互作用对杉木叶和枝的生态化学计量的影响(F值)
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Table 2 Results (F values) of two-way ANOVA on the effects of components, nitrogen deposition treatment level and their interaction the ecological stoichiometry in leaves and branches of Chinese fir
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| 因子 Factor | F (p)值 F (p) value | | C | N | P | C:N | C:P | N:P | | 叶组分 Leaf components | 1.173
(0.336) | 20.401
(<0.001) | 24.425
(<0.001) | 13.832
(<0.001) | 24.072
(<0.001) | 5.728
(0.003) | | 氮沉降 N deposition | 0.573
(0.637) | 3.272
(0.034) | 1.246
(0.309) | 3.158
(0.038) | 0.853
(0.475) | 0.631
(0.601) | | 叶组分×氮沉降 Leaf components × N deposition | 0.280
(0.976) | 0.893
(0.543) | 0.865
(0.565) | 0.537
(0.837) | 0.963
(0.487) | 0.575
(0.807) | | 枝组分 Branch components | 1.191
(0.329) | 9.407
(<0.001) | 19.685
(<0.001) | 6.534
(0.001) | 6.010
(0.002) | 8.176
(<0.001) | | 氮沉降 N deposition | 0.165
(0.919) | 1.782
(0.170) | 2.130
(0.116) | 1.229
(0.315) | 1.063
(0.378) | 5.123
(0.005) | | 枝组分×氮沉降 Branch components × N deposition | 0.398
(0.927) | 0.608
(0.781) | 0.365
(0.943) | 0.429
(0.910) | 0.371
(0.940) | 0.442
(0.902) |
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