华南4种乡土阔叶树种枯落叶分解能力

被引：26

作者：

张浩

庄雪影

机构：

[1] 华南农业大学林学院

[2] 华南农业大学林学院广州香港中文大学生物系香港

来源：

生态学报 | 2008年 / 05期

关键词：

乡土阔叶树种; 枯落叶; 人工林; 分解速率; 养分释放;

D O I：

暂无

中图分类号：

S714 [森林土壤学];

学科分类号：

0903 ; 090301 ;

摘要：

采用分解袋法,研究了樟树(Cinnamomum camphora(L.)Presl)、米老排(Mytilaria laosensis Lec.)、火力楠(Michelia macclurei Dandy)和黎蒴(Castanopsis fissa Rehd.et Wils.)4种华南乡土阔叶树种枯落叶在阔叶混交人工林和湿地松人工林下的分解能力。4个树种枯落叶的分解速率大小依次为:樟树>米老排>火力楠>黎蒴,它们在混交林中的分解速率均大于松林。4个树种枯落叶的分解动态符合Olson指数模型,分解系数(K)在混交林中均大于人工林,且在两种林地中均表现为樟树>米老排>火力楠>黎蒴。不同时间枯落叶养分动态分析结果显示,4个树种枯落叶的N元素分解均出现先富集,后释放的特点,但仅在松林下出现N元素的净释放;K元素释放方式表现为先释放,后富集,仅在阔叶林下出现K元素净释放;Ca、Mg和B元素均表现为分解前期少量富积,之后开始大量释放的变化趋势,它们在阔叶林和松林下均出现净释放。4个树种在P元素释放方式上差异较大,趋势不明显。

引用

页码：2395 / 2403

页数：9

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