[1]韩其晟,任宏刚,刘建军. 秦岭主要森林凋落物中易分解和难分解植物残体含量及比值研究[J].西北林学院学报,2012,27(05):6-10.
　HAN Qi-sheng,REN Hong-gang,LIU Jian-jun. Contents and Ratios of the Decomposable and Resistant Plant Material in the Litters of the Main Trees in Qingling Mountains[J].JOURNAL OF NORTHWEST FORESTRY UNIVERSITY,2012,27(05):6-10.
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 秦岭主要森林凋落物中易分解和难分解植物残体含量及比值研究()
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《西北林学院学报》[ISSN:1001-7461/CN:61-1202/S]

卷:
第27卷
期数:
2012年05期
页码:
6-10
栏目:
出版日期:
2012-09-20

文章信息/Info

Title:
 Contents and Ratios of the Decomposable and Resistant Plant Material in the Litters of the Main Trees in Qingling Mountains
文章编号:
1001-7461(2012)05-0006-05
作者:
 韩其晟; 任宏刚; 刘建军
 (1.西北农林科技大学 林学院，陕西 杨陵 712100；2.陕西省太白林业局苏家沟林场，陕西 太白 721600)
Author(s):
 HAN Qi-sheng;  REN Hong-gang;  LIU Jian-jun
 (1.College of Forestry, Northwest A&F University, Yangling, Shaanxi 712100, China; 2.Sujiagou Forest Farm of Taibai Forestry Bureau, Sujiagou, Shaanxi 721600, China)
关键词:
 ; 凋落物; 易分解有机物;  难分解有机物
Keywords:
 ; tree litter;  decomposable plant material;  resistant plant material
分类号:
Q718.52
文献标志码:
A
摘要:
 森林凋落物是森林生态系统中物质循环和能量流动的基础物质，凋落物中易分解植物残体（DPM）和难分解植物残体(RPM)含量及比值是反映凋落物分解速率的重要指标之一，英国洛桑试验站建立的土壤碳模型（Roth C）把DPM/RPM值作为一个重要输入参数模拟土壤有机碳的动态变化。已有的研究结果表明DPM/RPM的值与森林类型等有关，为了探明秦岭主要森林凋落物的DPM、RPM含量及其比值，采用硫酸水解法对秦岭主要森林凋落物的DPM/RPM值进行初步研究。结果表明：1）秦岭主要森林凋落物DPM/RPM的比值范围为0.45~1.22，其中白桦（Betula platyphylla）林的比值最高（1.22），华北落叶松（Larix principisi）林的最低（0.45），其平均值为0.792；不同森林类型排列顺序为白桦林>锐齿栎（Quercus aliena var. acuteserrata）林>油松(Pinus tabulaeformis)林> 巴山冷杉(Abies fargesii)林>华北落叶松林；2）不同类型森林凋落物中易分解植物残体DPM所占比例在31%~55%之间，其中阔叶林的DPM值平均为49.3%，大于针叶林的35.3%，从一个侧面证明阔叶林凋落物更容易被土壤微生物分解利用，针叶林凋落物有机碳周转的时间要长于阔叶树植物。这一结果将为今后利用Roth C模型进行秦岭林区不同森林生态系统土壤有机碳动态模拟提供参考。

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