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4 鹤山市马尾松次生林对照样地与过火样地不同林龄同一土层土壤有机碳密度t检验

Table 4 t-tests of the difference in soil organic carbon density between controls and burned plots in same soil layers in secondary Pinus massoniana forest of different ages in Heshan

土层 Soil layer (cm) 幼龄林 Young forest 中龄林 Mid-age forest 成熟林 Mature forest Levene检验 Levene test t检验 t test Levene检验 Levene test t检验 t test Levene检验 Levene test t检验 t test F p t p F p t p F p t p 0-10 2.811 0.169 13.919 0.001 0.205 0.674 10.450 0.001 2.058 0.225 11.801 0.001 10-20 1.556 0.280 20.485 0.001 2.593 0.183 17.768 0.001 0.513 0.514 9.736 0.001 20-30 0.517 0.512 23.744 0.001 5.343 0.082 37.536 0.001 0.150 0.718 2.618 >0.05 30-40 1.726 0.259 2.561 >0.05 0.755 0.434 1.968 >0.05 4.344 0.106 2.657 >0.05 40-60 4.595 0.099 1.334 >0.05 2.683 0.177 1.681 >0.05 3.099 0.153 1.786 >0.05