琼北地区木麻黄林下植被调查与分析

Investigation and analysis of Casuarina undstory vegetation in northern hainan island

选取不同林龄木麻黄人工纯林林下植被进行取样和分析,研究不同林龄木麻黄林下植被结构特征,生物量及碳储量分配特征和林下凋落物现存量情况,并进行比较分析。结果显示:相同区域不同树龄的木麻黄人工纯林林下植被结构组成主要以草本植物为主,灌木基本不生长,并且随着树龄增加,草本植物数量明显增多之趋;不同树龄间草本植物生物量存在明显差异,生物量最大值是出现在15a生林地,值为1.68t/hm2,并基本表现为地上生物量大于地下生物量的生长规律;不同树龄木麻黄人工纯林林下枯落物厚度存在明显差异,10a生木麻黄纯林枯落物厚度最大,达6.67cm,枯落物已达到14.69t/hm2,并且表现为半分解层大于未分解层。

By selecting different forest vegetation age Casuarina Plantation forest sampling and analysis of different Casuarina forest age structure of understory vegetation, biomass and carbon stocks and forest litter distribution characteristics of existing capacity and to conduct a comparative analysis. The results show： the vegetation structure under Casuarina Plantation Forests same area at different ages composed mainly herbaceous plants, shrubs, basically no growth, and with the increase of age, significantly increased the number of chemotaxis herbs; herb different biological age the existence of significant differences in the amount, the maximum biomass is seen in 15-year-old woodland, is 1.68 t / hm^2, and the basic performance of aboveground biomass is greater than the growth pattern of below-ground biomass; at different ages Casuarina Plantation forest litter the existence of significant differences in thickness, 10-year-old Casuarina pure forest litter depth, amounting to 6.67 cm, litter has reached 14.69 t / hm^2, and the performance of semi-decomposed layer is greater than the undecomposed layer.