摘要
文章主要基于牡丹江江山娇实验林场复合型防火林带,以白桦、黑桦和枫桦为研究对象,共选择15块标准样地,利用相对生长法进行计算和分析。结果表明:白桦随着树龄和胸径增大,干材、树枝生物量在总生物量中占比逐渐上升并趋于稳定。白桦树皮、树叶、树根生物量在总生物量所占比均有随着树龄和胸径的增大逐渐下降的趋势,且在后期趋于稳定。黑桦干材、树根生物量在总生物量占比随着树龄增加具有明显降低趋势,其中树根降低幅度较大,变化趋势明显,树干降低幅度较小且变化均匀。树枝、树叶生物量随树龄增加有逐渐上升趋势。干材生物量在单株总生物量中占比不足50%,树叶生物量在单株总生物量中所占比基本维持在一个相对平衡状态。枫桦干材和树枝生物量在总生物量中占比随着树龄和胸径增加有逐渐增加的趋势,枫桦树叶、树皮和树根生物量在总生物量中占比有随着树龄和胸径的增加逐渐降低的变化趋势,其中树叶生物量占比变化均匀,树皮和树根生物量变化幅度较大。
This paper is mainly based on the compound type fireproof forest belt of Jiangshanjiao experimental forest farm in Mudanjiang, with birch, black birch, Betula costata as the study object, a total of 15 pieces of standard sample plots were selected, the relative growth method was utilized to analyze sampling data. The results indicated that the stem, branch material in the proportion of total biomass of birch increase and sta- bilized gradually with the gradual growth of age and DBH. On the contrary, the biomass proportion of bark,leaf and root decrease and stabilized with the growing age and DBH. Black betula stem, root biomass in the proportion of total biomass increase with tree age have obvious decreasing trend, in which the root is greatly reduce, the change trend is obvious, and the decrease is small and uniform change of stem. Branch leaves bio- mass increase with tree age increasing trend. Stem biomass accounted for less than＇50% in the total biomass., leaf biomass in the total biomass accounted for the proportion of basic remaining at a relatively balanced state. The stem and branch biomass in the proportion of total biomass of Betula costata is increasing gradually with tree age and DBH, on the contrary, the biomass proportion of leaf, bark and root decrease gradually with the rowing are and DBH, which accounted for uniform chance of leaf. bark and toot with large variation range.
出处
《安徽农业科学》
CAS
2015年第8期128-129,共2页
Journal of Anhui Agricultural Sciences
关键词
防火林带
桦木
生物量
器官
Fireproof forest belt
Birch
Biomass
Organ
