四个典型温带树种不同根序细根分解速率及其主要影响因素

顾伟平,刘瑞鹏,李兴欢,孙涛,张子嘉,昝鹏,温璐宁,马鹏宇,毛子军

Decomposition of different root branch orders and its dominant controlling factors in four temperate tree species

GU Wei-Ping,LIU Rui-Peng,LI Xing-Huan,SUN Tao,ZHANG Zi-Jia,ZAN Peng,WEN Lu-Ning,MA Peng-Yu,MAO Zi-Jun

表4 四个温带树种的细根分解袋实验的初始化学参数(平均值±标准误差)

Table 4 Initial root chemistry parameters at the start of the litterbag experiment in the four temperate tree species (mean ± SE)

树种 Tree Species 红松 Pinus koraiensis 落叶松 Larix gmelinii 水曲柳 Fraxinus mandschurica 白桦 Betula platyphylla 根序 Root order [1+2] [3+4] [1+2] [3+4] [1+2] [3+4] [1+2] [3+4] N (mg·g-1) 21.6 ± 0.9 12.3 ± 0.5 25.5 ± 2.3 13.9 ± 1.2 31.9 ± 1.8 18.3 ± 1.3 28.1 ± 1.6 16.7 ± 1.1 P (mg·g-1) 1.9 ± 0.4 1.4 ± 0.4 2.8 ± 0.2 1.9 ± 0.2 2.5 ± 0.1 1.7 ± 0.2 2.2 ± 0.1 1.4 ± 0.2 K (mg·g-1) 4.4 ± 0.5 2.9 ± 0.1 5.8 ± 0.2 4.5 ± 0.3 4.0 ± 0.1 4.9 ± 0.3 5.3 ± 0.6 3.7 ± 0.3 AUF (mg·g-1) 528.5 ± 40.1 398.6 ± 32.9 513.4 ± 38.7 435.8 ± 37.5 401.7 ± 29.6 289.3 ± 26.4 397.5 ± 34.1 302.1 ± 28.2 TNC (mg·g-1) 101.7 ± 10.9 150.2 ± 18.4 98.3 ± 9.6 138.0 ± 14.1 195.8 ± 20.6 279.1 ± 23.5 164.9 ± 18.3 214.6 ± 21.4 C:N 29.6 ± 1.4 48.2 ± 1.9 23.6 ± 1.8 45.2 ± 3.1 14.4 ± 2.1 23.7 ± 2.4 18.7 ± 2.0 34.8 ± 3.1