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本文研究了鼎湖山南亚热带常绿阔叶林和针叶林的凋落物量及凋落物中主要营养元素(N、P、K、Ca、Mg)的含量。8年的测定结果表明,两个森林类型的年均凋落物量(t·ha~(-1))及凋落物中主要营养元素的含量(t·ha~(-1)·yr~(-1))分别为:常绿阔叶林9.056,0.220;针叶林2.695,0.032。凋落物中叶、枝和花果的百分组成及凋落特征各异。鼎湖山南亚热带常绿阔叶林的年均凋落物量低于热带雨林而高于暖温带落叶阔叶林,说明不同气候带的森林类型,其凋落物量是有差异的。与针叶林相比较,常绿阔叶林的凋落物量较大,凋落物中主要营养元素的含量较高,凋落物的分解速率也较快,因此从提高森林的质量和增强森林的生态效益来考虑,在造林绿化上应提倡多营造常绿阔叶林或针阔叶混交林。
In this paper, the litterfall and the main nutrient elements (N, P, K, Ca and Mg) in the evergreen broad-leaved forest and coniferous forest in Dinghushan were studied. The results of 8 years showed that the annual litterfall (t ha -1) and litter nutrient content (t ha -1 yr -1 )) Were: evergreen broad-leaved forest 9.056,0.220; coniferous forest 2.695,0.032. The percentage of litter, branch and flower in the litter varied with litterfall characteristics. The annual average litterfall of subtropical evergreen broad-leaved forest in Dinghushan is lower than that of tropical rainforest and higher than that of warm-temperate deciduous broad-leaved forest, indicating that there are differences in the amount of litter in forest types in different climatic zones. Compared with coniferous forest, the evergreen broad-leaved forest had larger litter amount, higher nutrient content in litter, and faster litter decomposition rate. Therefore, from improving the quality of forest and enhancing the ecological benefit of forest Consider, afforestation should advocate to create more evergreen broad-leaved forest or coniferous and broad-leaved mixed forest.