亚热带不同树种凋落叶分解对氮添加的响应

陈思路,蔡劲松,林成芳,宋豪威,杨玉盛

Response of leaf litter decomposition of different tree species to nitrogen addition in a subtropical forest

Si-Lu CHEN,Jin-Song CAI,Cheng-Fang LIN,Hao-Wei SONG,Yu-Sheng YANG

表2 亚热带森林不同凋落叶初始化学性质(平均值±标准偏差, n = 3)

Table 2 Initial chemical properties of leaf litter in a subtropical forest (mean ± SD, n = 3)

树种 Species C (g·kg-1) N ( g·kg-1) P ( g·kg-1) 可萃取物 Extractive (%) 纤维素 Cellulose (%) 木质素 Lignin (%) C:N C:P 木质素:N Lignin:N 木质素:P Lignin:P 米槠 Castanopsis carlesii 486.44 ± 2.15 14.22 ± 0.19 0.34 ± 0.03 55.50 ± 1.58 24.50 ± 1.07 20.00 ± 1.02 34.21 ± 2.13 1 158.20 ± 0.78 1.41 ± 0.05 47.62± 1.56 杉木 Cunninghamia lanceolata 525.05 ± 2.39 16.03 ± 0.16 0.79 ± 0.10 51.40 ± 0.95 24.30 ± 1.02 24.30 ± 0.85 32.75 ± 0.95 664.62 ± 0.50 1.52 ± 0.05 30.76 ± 5.46 观光木 Michelia odora 390.24 ± 1.68 24 .26 ± 0.12 0.92 ± 0.05 55.20 ± 0.97 25.50 ± 0.95 19.30 ± 1.16 16.10 ± 0.26 424.45 ± 0.36 0.80 ± 0.28 20.98 ± 2.15 台湾相思 Acacia confusa 501.37 ± 2.81 27.61 ± 0.36 0.56 ± 0.02 51.10 ± 1.87 26.60 ± 0.45 22.30 ± 0.81 18.14 ± 0.09 894.69 ± 0.52 0.81 ± 0.35 39.82 ± 0.97