Nutrient and Litter Patterns in Three Subalpine Coniferous Forests of Western Sichuan, China

LIN Bo; LIU Qing; WU Yan; HE Hai

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Nutrient and Litter Patterns in Three Subalpine Coniferous Forests of Western Sichuan, China

机译：川西三亚高山针叶林的养分和凋落物模式

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Investigations were conducted to quantify litterfall, and litter and nutrient accumulation in forest floor, and to acquire information on litter decomposition and nitrogen and phosphorus-release patterns in three different subalpine coniferous forests, a plantation (Pl), a secondary forest (SF), and a primitive forest (PF), in western Sichuan, China. The litter trap method was used to evaluate litterfall with the litterbag method being utilized for litterdecomposition. Seasonal patterns of litterfall were similar in the three forests, with two peaks occurring in September-November and March-May. The plantation revealed an annual litterfall of 4.38 × 103 kg ha-1, which was similar to those of SF and PF, but Pl had a lower mass loss rate and a higher C/N ratio. The C/N ratio may be a sound predictor for the decomposition differences. N concentrations of leaf litter in both the secondary forest and primitive forest increased first and then decreased, and the percentages of their final/initial values were 108.9% and 99.9%, respectively. P concentration in the three forests increased by the end of the study. The results of litterfall and decomposition indicated that in the plantation the potential to provide nutrients for soil organic matter was similar to those of SF and PF; however, its slower decomposition rate could result in a somewhat transient accumulation of litter in the forest floor.

机译：进行调查以量化森林地面上的凋落物，凋落物和养分积累，并获取有关三种不同的高山针叶林，人工林（Pl），次生林（SF），以及中国四川西部的原始森林（PF）。垃圾收集器方法用于评估垃圾量，垃圾袋方法用于垃圾分解。在三个森林中，凋落物的季节性模式相似，在9月至11月和3月至5月出现两个高峰。人工林的年凋落物量为4.38×103 kg ha-1，与SF和PF相似，但P1的质量损失率较低，C / N比较高。 C / N比可以是分解差异的声音预测器。次生林和原始森林中凋落物的氮含量先升高后降低，其终末/初值的百分比分别为108.9％和99.9％。到研究结束时，三个森林中的磷浓度增加。凋落物和分解的结果表明，在人工林中为土壤有机质提供养分的潜力与SF和PF相似。但是，其分解速度较慢，可能会导致林地中凋落物的暂时积累。

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来源
《土壤圈（英文版）》 |2006年第3期|380-389|共10页
作者
LIN Bo; LIU Qing; WU Yan; HE Hai;
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作者单位

Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041 China;

Graduate University of the Chinese Academy of Sciences, Beijing 100049 China;

Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041 China;

Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041 China;

Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041 China;

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收录信息中国科学引文数据库(CSCD);
原文格式 PDF
正文语种 chi
中图分类农业基础科学;
关键词
accumulation; decomposition; litterfall; nutrient release; subalpine coniferous forests;

机译：积累;分解;凋落物;养分释放;亚高山针叶林;

Nutrient and Litter Patterns in Three Subalpine Coniferous Forests of Western Sichuan, China

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