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1 鹤山市马尾松次生林样地基本概况

Table 1 Basic information of sampling plots in secondary Pinus massoniana forests in Heshan

龄组 Age group 样地类型 Plot type 平均年龄 Average age (a) 林分密度(株·hm-2) Tree density (individual·hm-2) 郁闭度 Canopy coverage 平均胸径 Average DBH (cm) 平均树高 Average tree height (m) 坡度 Slope (°) 坡位 Slope position 坡向 Aspect 海拔 Altitude (m) 幼龄林 Young forest 对照 CK 8 1 647 0.85 8.34 6.27 10-25 中部 Middle part 阳坡 Sunny slope 48 过火 Postfire forest 8 1 632 0.85 8.25 6.75 15-25 52 中龄林 Mid-age forest 对照 CK 17 1 107 0.75 10.71 9.35 15-25 59 过火 Postfire forest 17 1 047 0.75 10.85 9.14 20-30 75 成熟林 Mature forest 对照 CK 31 817 0.70 17.24 15.24 20-35 64 过火 Postfire forest 31 796 0.70 17.43 15.62 20-30 65