高级检索
    张琴, 林天喜, 王贵春, 孙国文, 范秀华. 红松、蒙古栎和色木槭凋落物混合分解研究[J]. 北京林业大学学报, 2014, 36(6): 106-111. DOI: 10.13332/j.cnki.jbfu.2014.06.020
    引用本文: 张琴, 林天喜, 王贵春, 孙国文, 范秀华. 红松、蒙古栎和色木槭凋落物混合分解研究[J]. 北京林业大学学报, 2014, 36(6): 106-111. DOI: 10.13332/j.cnki.jbfu.2014.06.020
    ZHANG Qin, LIN Tian xi, WANG Gui chun, SUN Guo wen, FAN Xiu hua. Decomposition of mixed litter of Pinus koraiensis, Quercus mongolica and Acer mono[J]. Journal of Beijing Forestry University, 2014, 36(6): 106-111. DOI: 10.13332/j.cnki.jbfu.2014.06.020
    Citation: ZHANG Qin, LIN Tian xi, WANG Gui chun, SUN Guo wen, FAN Xiu hua. Decomposition of mixed litter of Pinus koraiensis, Quercus mongolica and Acer mono[J]. Journal of Beijing Forestry University, 2014, 36(6): 106-111. DOI: 10.13332/j.cnki.jbfu.2014.06.020

    红松、蒙古栎和色木槭凋落物混合分解研究

    Decomposition of mixed litter of Pinus koraiensis, Quercus mongolica and Acer mono

    • 摘要: 以位于中国东北吉林蛟河的天然红松阔叶林森林生态系统为研究对象,针对其中主要树种的凋落物分解速 率和分解过程研究中的几个关键问题进行了探讨。研究内容包括该生态系统中常见的红松、蒙古栎和色木槭的凋 落物的分解速率,在分解过程中的养分动态和凋落物的混合效应及其机制等。本研究使用的具体方法为凋落物降 解袋法。结果表明:1)凋落物中各种营养元素的初始含量差异显著,其中初始氮、磷含量与凋落物的分解速率呈正 相关。2)不同树种凋落物的失重率之间差异显著,且均随时间进程增大,但是和时间不成线性关系。3)在整个分 解进程中,凋落物的分解速率开始时明显升高,中后期以后逐渐平稳。4)单一凋落物分解中,阔叶凋落物的分解速 率高于针叶的分解速率。5)395 d 的分解进程中,有机碳(C)、全氮(N)、全磷(P)、全钾(K)含量呈动态变化, N 和 P 均表现出富集现象,N 在短期富集后强烈释放;C 和K 表现为净释放;C/ N 持续下降。6)红松 蒙古栎和红松 色 木槭混合凋落物对分解速率产生显著的混合效应; 混合凋落物对分解过程中的养分动态, 尤其是P 和N 元素具有 显著的混合效应, 而混合效应的方向(正或负)和强度是十分复杂的;混合效应是否能发生及其发生的方向主要是 由组分凋落物的特点来决定的。

       

      Abstract: This paper is aimed to study several key problems about the rate and process of litter decomposition of several main tree species in the natural Korean pine broadleaved forest ecosystem in Jiaohe, Jilin of China. The research contents include the decomposition rates, nutrient dynamics, mixed effects and mechanism of mixed effects in litters of several common plant species ( Pinnus koraiensis, Quercus mongolica and Acer mono). The research method was litter bag burying. The results were: 1) The initial concentrations of nutrients in the litters varied significantly, and the initial concentrations of nitrogen (N) and phosphorus (P) were significantly and positively correlated with the decomposition rate. 2) The ratios of mass loss among the litters of different tree species varied significantly, and the variance increased over time, but not followed the linear pattern. 3) The decomposition rates of litters increased at first phase of whole decomposition process, then became steady after middle phase. 4 ) The decomposition rates of broadleaved tree species were higher than those of conifer if considering the decomposition of a single litter. 5) During the 395 days decomposition,the concentrations of organic carbon (C), total N and P, and total potassium (K) showed the changes dynamically. Both N and P were accumulated, but N released remarkably after short term accumulation; The C and K had net release; the ratio of C to N decreased continiously. 6 ) There were great mixed effects in the decomposition rates of litter mixtures of Pinnus koraiensis Quercus mongolica and Quercus mongolica Acer mono, also the same mixed effects to the nutrient dynamics during the decomposition process, especially for N and P, however the modes (positive or negative) of mixed effects and strengths were extremely complex. Whether or not mixed effects occurred and which mode mixture effect is in were determined by the characteristics of composed litters.

       

    /

    返回文章
    返回