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首页> 外文期刊>International journal of ecology & enviromental sciences >Litter Production and Nutrient Return in Three Different Aged Regenerating White Oak (Quercus leucotrichophora A. Camus) Forests in the Central Himalaya
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Litter Production and Nutrient Return in Three Different Aged Regenerating White Oak (Quercus leucotrichophora A. Camus) Forests in the Central Himalaya

机译：喜马拉雅山中部三种不同年龄的再生白栎林（栎栎）的凋落物产量和养分归还

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摘要

The present study described forest floor biomass, patterns of litter fall and nutrient return in three regenerating white oak (Quercus leucotrichophora) forests (16, 27 and 34 years old). The study sites were earlier invaded by pine (Pinus roxburghii) and oak returned after fire killed the pine. The main objectives of the present study were to evaluate changes in litter dynamics of regenerating oak forests and to estimate the time of recovery these forests may require. Total annual litter fall was 258.5 g m-2, 428.3 g m-2 and 561.7 g m-2, respectively in the 16, 27 and 34 year old oak stands. The proportional contribution of the leaf litter fraction to the total litter fall decreased significantly with stand age. Litter nutrient concentration in the 16 year old oak stand was the lowest and generally highest in 34 year old stand. Relatively high leaf litter nutrient concentration and low nutrient retranslocation from senescing tissues, low litter dry matter: litter N ratio in the 34 year old forest indicate increase in soil nutrient pool. These estimates are similar to undisturbed mature oak forests of the region.
机译：本研究描述了三种再生白栎林（16、27和34岁）的林地生物量，凋落物下降的模式和养分归还。研究地点较早被松树（Pinus roxburghii）入侵，大火杀死松树后归还橡木。本研究的主要目的是评估再生橡树林的凋落动力学变化，并估计这些森林可能需要的恢复时间。在16、27和34岁的橡木林中，凋落物的年度总下降分别为258.5 g m-2、428.3 g m-2和561.7 g m-2。凋落物分数对总凋落物的比例贡献随着年龄的增长而显着降低。 16年生橡木林分中凋落物养分含量最低，在34年生林分中通常最高。相对较高的叶片凋落物养分浓度和较低的养分组织中的养分迁移率，较低的凋落物干物质：34年生林中的凋落物氮比表明土壤养分库增加。这些估计值与该地区未受干扰的成熟橡树林相似。

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