川西亚高山林线交错带植被凋落物量及养分归还动态

被引：8

作者：

齐泽民 ^{[1
,2
]}

王开运 ^{[1
]}

机构：

[1] 内江师范学院化学与生命科学系

[2] 华东师范大学上海市城市化过程和生态恢复重点实验室

来源：

生态学杂志 | 2010年 / 29卷 / 03期

基金：

国家自然科学基金重大研究计划;

关键词：

川西; 亚高山林线; 交错带; 凋落物; 动态;

D O I：

10.13292/j.1000-4890.2010.0068

中图分类号：

Q948 [植物生态学和植物地理学];

学科分类号：

071012 ; 0713 ;

摘要：

从2006—2008年,研究了川西亚高山林线交错带群落凋落物产量及N、P、K、Ca和Mg主要养分归还动态。结果表明:林线交错带植被凋落物年产量为389.83kg.hm-2.a-1,5种主要养分年归还量总量为15.82kg.hm-2.a-1,归还量排序为Ca>N>K>Mg>P。其中,叶、枝和其他混合杂物分别占凋落物总量的72.2%、17.9%和9.9%,占养分归还总量的87.4%、7.0%和5.6%。凋落物各组分及养分归还月动态均呈单峰曲线型变化,叶高峰期在9月,而枝、杂物则在10月。凋落物养分含量季节动态因不同凋落物组分和养分元素而异。叶凋落物中N、P、K和Mg含量在生长高峰的6、7月较高,而Ca含量较低;枝凋落物各元素含量总体上月变化不显著,其他混合杂物各元素含量6与10月相对较高,其余各月则无显著差异。

引用

页码：434 / 438

页数：5

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