不同来源可溶性有机物对亚热带森林土壤CO<sub>2</sub>排放的影响

不同来源可溶性有机物对亚热带森林土壤CO₂排放的影响

万菁娟, 郭剑芬, 纪淑蓉, 任卫岭, 司友涛, 杨玉盛

Effects of different sources of dissolved organic matter on soil CO₂ emission in subtropical forests

WAN Jing-Juan,GUO Jian-Fen,JI Shu-Rong,REN Wei-Ling,SI You-Tao,YANG Yu-Sheng

表2 不同来源可溶性有机物的性质(平均值±标准误差)

Table 2 Properties of different sources of dissolved organic matter (mean ± SE)

	可溶性有机碳 Dissolved organic carbon (g·kg^-1)	可溶性有机氮 Dissolved organic nitrogen (g·kg^-1)	紫外吸收值 Special ultraviolet visible absorption (UV)	腐殖化指标 Humification index (HIX)	分子量大小 Molecular size	pH
杉木鲜叶 Fresh leaves of Cunninghamia lanceolata	2.60 ± 0.51^a	0.005 ± 0.001^a	0.24 ± 0.01^a	0.26 ± 0.01^a	5.24 ± 0.98^a	5.98 ± 0.12^a
米槠鲜叶 Fresh leaves of Castanopsis carlesii	0.80 ± 0.11^b	0.024 ± 0.002^b	0.76 ± 0.08^b	1.75 ± 0.11^b	3.75 ± 0.10^b	5.91 ± 0.05^b
杉木凋落叶 Leaf litter of Cunninghamia lanceolata	0.99 ± 0.03^c	0.014 ± 0.001^c	1.61 ± 0.02^c	1.91 ± 0.03^c	6.90 ± 0.07^c	5.76 ± 0.05^c
米槠凋落叶 Leaf litter of Castanopsis carlesii	1.59 ± 0.02^d	0.020 ± 0.001^d	1.64 ± 0.04^c	1.90 ± 0.02^c	4.80 ± 0.30^d	4.28 ± 0.01^d