Increased litter input increases litter decomposition and soil respiration but has minor effects on soil organic carbon in subtropical forests

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• 作者：Xiong Fang ; Liang Zhao ; Guoyi Zhou ; Wenjuan Huang ; Juxiu Liu
• 关键词：Increased litter input ; Litter quality ; Litter decomposition ; Soil respiration ; Soil organic C ; Subtropical forests
• 刊名：Plant and Soil
• 出版年：2015
• 出版时间：July 2015
• 年：2015
• 卷：392
• 期：1-2
• 页码：139-153
• 全文大小：995 KB
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• 作者单位：Xiong Fang (1) (2)
  Liang Zhao (1)
  Guoyi Zhou (1)
  Wenjuan Huang (1)
  Juxiu Liu (1)
  
  1. Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Xingke Road 723, Tianhe District, Guangzhou, 510650, China
  2. Graduate University of Chinese Academy of Sciences, Beijing, 100049, China
  
• 刊物类别：Biomedical and Life Sciences
• 刊物主题：Life Sciences
  Plant Sciences
  Soil Science and Conservation
  Plant Physiology
  Ecology
  
• 出版者：Springer Netherlands
• ISSN：1573-5036

文摘

Aims This study investigated the effects of changes in litter quantity and quality on litter decomposition, soil respiration, and soil organic carbon (SOC) in subtropical forests. Methods The experiment had a nested factorial design with three factors: (1) successional stage with three levels (early, mid and mature), (2) litter type with two levels (Schima superba Gardn. et Champ. and Ormosia pinnata (Lour.) Merr.), and (3) litter addition with five levels (0, 218, 436, 654 and 873?g·m?·yr?, respectively). Results In all forests, an increase in litter input increased litter decomposition, litter carbon (C) loss and soil respiration but did not alter SOC content after 2.5?years. The increases in litter decomposition, litter C loss, and soil respiration in response to increased litter input were greater with the lower quality Schima superba litter than with the higher quality Ormosia pinnata litter. Litter quality did not affect SOC content at any of the three forest sites. The responses of litter decomposition and soil respiration to increasing litter input differed depending on forest successional stage. Conclusions In subtropical forests, increases in litter production under climate change may accelerate C cycling. Net soil C storage in subtropical forests, however, may not change over short time scales in response to increased litter input.