| 大熊猫栖息环境的森林凋落物动态研究 |
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| 引用本文： | 马志贵,王金锡. 大熊猫栖息环境的森林凋落物动态研究[J]. 植物生态学报, 1993, 17(2): 155-163 |
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| 作者姓名： | 马志贵 王金锡 |
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| 作者单位： | 四川省林科院，四川省林科院 成都 610081，成都 610081 |
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| 摘 要： | 本文以王朗自然保护区冷杉、云杉暗针叶林为对象，在定位测定森林凋落量及其动态和枯枝落叶贮量的基础上，研究了凋落物分解速率及其主要营养元素含量的变化，结果表明：(1)地表枯枝落叶总贮量变化在30.0—91.8t／ha，其中未分解层4.9—17.8，半分解层11.5—19.7，腐殖质层13.6—57.3t／ha。(2)森林凋落的枯枝落叶量因林型不同而略有差异，平均为2.8 t／ha·yr，其凋落高峰期分别在生长季开始的5月和生长季末的10月。(3)每年以凋落物形式返回林地的养分，氮为35.5kg／ha、磷为5.7kg／ha、钾为7.0kg／ha、镁为6.8kg／ha、钙为62.9kg／ha。(4)森林各种凋落物的混合物年分解率为0.3041g／g。95%的凋落物被分解需时约10年，在分解一段时间后，凋落物中的氮、钙、镁含量略有上升，钾明显减少，而磷含量变化不大。(5)森林凋落物的混合物腐解过程中，养分释放速率大小的顺序为：K>P>Mg>Ca>N，大熊猫主食竹的凋落叶则为：K>N>Ca>Mg>P。
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| 关 键 词： | 大熊猫栖息环境 凋落物 养分 动态 |
A STUDY ON THE DYNAMICS OF FOREST LITTER IN THE HABITAT OF GIANT PANDA |
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| Ma Zhi-gui Wang Jin-xi. A STUDY ON THE DYNAMICS OF FOREST LITTER IN THE HABITAT OF GIANT PANDA[J]. Acta Phytoecologica Sinica, 1993, 17(2): 155-163 |
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| Authors: | Ma Zhi-gui Wang Jin-xi |
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| Abstract: | This work measured the litter′s weight of every month in a year, the decomposing rate and the change of the major nutrient elements under subalpine dark coniferous forests in Wanglang nature preserve. The result shows:1) The total observed quantity of litter layers is between 29.97 and 91.76t/ha. 2)The litter weight changes slight for the different kinds of forests, with average about 2.8t/ha equally. The high withering seasons are May and October, which are the beganing and the end of the growth season. 3) In one year, the nutrients that returned to soil as litter are 35. 458kg, 5.71kg, 6.99kg, 62.89 kg and 6.78kg per hectare for N, P, K, Ca and Mg respectively. 4) The decomposing rate of litter is 0.3041g/g·year, t0.95 is 10 years. 5) In the time of litter decomposing, the releasing rates of nutrients are in the order of K>P>Mg>Ca>N. |
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| Keywords: | Habitat of Giant panda Forest litter Dynamic |
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