中亚热带植被恢复对土壤有机碳含量、碳密度的影响

辜翔,张仕吉,刘兆丹,李雷达,陈金磊,王留芳,方晰

Effects of vegetation restoration on soil organic carbon concentration and density in the mid-subtropical region of China

GU Xiang,ZHANG Shi-Ji,LIU Zhao-Dan,LI Lei-Da,CHEN Jin-Lei,WANG Liu-Fang,FANG Xi

表2 不同植被恢复阶段的群落生物量和凋落物层养分特征(平均值±标准偏差)

Table 2 Plant community biomass and nutrient characteristics of litter layer at different stages during vegetation restoration (mean ± SD)

恢复阶段 Restoration stage	群落总生物量 Community total biomass (kg·hm^-2)	地上部分生物量 Aboveground biomass (kg·hm^-2)	根系生物量 Root biomass (kg·hm^-2)	凋落物层现存量 Existing biomass in litter layer (kg·hm^-2)	凋落物层 C含量 C concentration in litter layer (g·kg^-1)	凋落物层 N含量 N concentration in litter layer (g·kg^-1)	凋落物层 P含量 P concentration in litter layer (g·kg^-1)	凋落物层 C/N比 C/N ratio in litter layer	凋落物层 C/P比 C/P ratio in litter layer	凋落物层N/P比 N/P ratio in litter layer
LVQ	5 185.4 ± 2 702.5^a	2 244.5 ± 1 153.9^a	2 029.6 ± 1 515.7^a	911.4 ± 653. 9^a	315.8 ± 25.3^ac	9.84 ± 0.3^a	0.30 ± 0.02a	35.8 ± 2.6^a	1532.2 ± 95.2^a	41.5 ± 2.9^a
LCQ	2 0591.5 ± 9 728.9^b	10 346.7 ± 7 143.2^b	5 443.0 ± 3 467.5^a	4 801.8 ± 1 030.2^b	277.2 ± 33.3^a	11.2 ± 0.9^a	0.34 ± 0.03^ab	26.0 ± 0.2^b	914.2 ± 69.4^b	35.7 ± 3.6^a
PLL	129 112.7 ± 19 713.5^c	107 692.6 ± 16 361.6^c	16 332.9 ± 3 047.6^b	5 087.2 ± 1 246.1^b	424.1 ± 8.6^b	11.5 ± 0.5^a	0.33 ± 0.05^ab	38.0 ± 1.6^a	1389.7 ± 227.9^ab	36.6 ± 4.4^a
LAG	148 975.4 ± 43 906.4^c	120 695.2 ± 13 647.7^c	24 400.4 ± 5 124.8^c	3 879.8 ± 1 171.5^b	332.3 ± 53.9^c	14.0 ± 0.2^b	0.38 ± 0.04^b	23.9 ± 3.5^b	953.1 ± 44.6^b	40.3 ± 4.0^a