中度强度森林火灾对马尾松次生林土壤有机碳密度的影响

罗斯生, 罗碧珍, 魏书精, 胡海清, 李小川, 吴泽鹏, 王振师, 周宇飞, 钟映霞

Effects of moderate forest fires on soil organic carbon density in secondary forests of Pinus massoniana

LUO Si-Sheng, LUO Bi-Zhen, WEI Shu-Jing, HU Hai-Qing, LI Xiao-Chuan, WU Ze-Peng, WANG Zhen-Shi, ZHOU Yu-Fei, ZHONG Ying-Xia

表2 鹤山市不同林龄马尾松次生林细根生物量(平均值±标准偏差, t·hm-2)

Table 2 Fine root biomass in secondary Pinus massoniana forest of different ages in Heshan (mean ± SD, t·hm-2)

龄组 Age group 样地类型 Plot type 土层 Soil layer (cm) 0-10 10-20 20-30 30-40 40-60 幼龄林 Young forest 对照 CK 3.10 ± 0.20 2.25 ± 0.12 1.48 ± 0.09 0.79 ± 0.06 0.21 ± 0.01 过火 Postfire forest 2.30 ± 0.16 1.83 ± 0.10 1.30 ± 0.09 0.76 ± 0.04 0.19 ± 0.01 中龄林 Mid-age forest 对照 CK 4.51 ± 0.31 3.12 ± 0.20 2.18 ± 0.13 1.02 ± 0.08 0.32 ± 0.02 过火 Postfire forest 3.22 ± 0.21 2.45 ± 0.18 1.86 ± 0.12 0.98 ± 0.07 0.30 ± 0.02 成熟林 Mature forest 对照 CK 5.13 ± 0.29 3.24 ± 0.16 2.53 ± 0.15 1.18 ± 0.08 0.34 ± 0.02 过火 Postfire forest 3.14 ± 0.18 2.38 ± 0.16 2.06 ± 0.10 1.05 ± 0.07 0.29 ± 0.02