会同第二代杉木人工林林下植被生物量分布及动态

A Study on Biomass Dynamics and Distribution of Undervegetation in the Secondary Generation of Chinese Fir Plantation in Hui Tong

对会同第2代杉木人工林速生阶段林下地被物生物量进行了2a的定位研究,探讨了杉木林林下灌木层、草本层的生物量动态变化。结合幼林期林下地被物生物量的特征,分析了第2代杉木林林下活地被物生物量的动态变化特征。结果表明:13年生林分中灌木层生物量为521 89kg·hm-2,草本层为1429 71kg·hm-2;14年生林分中灌木层生物量为372 69kg·hm-2,草本层为897 10kg·hm-2,2a中,灌木层各组分生物量大小顺序都为根>茎>叶;草本层生物量的大小顺序为地下部分>地上部分。在杉木14a的生长过程中,林分5年生时,活地被物生物量最大,为3089 62kg·hm-2,14年生时最小,为1269 79kg·hm-2。

The biomass of undervegetation in the secondary generation of Chinese fir plantation at fastgrowing stage was studied for 2 years at Hui Tong.Biomass in undervegetation shrubs, herbs was discussed. In the light of specific conditions of biomass of undervegetation in the secondary generation of young Chinese fir plantation, the biomass dynamics of livingundervegetation in the secondary generation of Chinese fir plantation were analyzed. The results showed that the biomass of undervegetation shrubs and herbs in 13year old Chinese fir stand were 52189 kg·hm-2 and 1 4297 kg·hm-2.The biomass of undervegetation shrubs and herbs in 14year old Chinese fir stand were 37269 kg·hm-2 and 89710 kg·hm-2.In the 2 years, the biomass orders of shrub all was root>stem>leaf, while the biomass order of herb was under ground part>above ground part.The biomass of livingundervegetation is the largest,3 08962 kg·hm-2 in 5year old. The biomass of livingundervegetation is smallest,1 26979 kg·hm-2 in 14year old.