Soil organic carbon storage capacity positively related to forest succession on the Loess Plateau, China
Soil organic carbon storage capacity positively related to forest succession on the Loess Plateau, China
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DOI：
10.1016/j.catena.2013.06.016
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发表时间：
2013-11-01
期刊：
影响因子：
6.2
通讯作者：
Sweeney, Sandra
中科院分区：
文献类型：
--
作者：
Deng, Lei;Wang, Kai-Bo;Sweeney, Sandra
自然恢复导致的土地利用变化可能会增强陆地生态系统的固碳能力。为探讨森林恢复过程中土壤碳库变化的影响因素，对黄土高原中部子午岭林区不同植被演替阶段土壤有机碳进行了沿着150 a时间序列的比较研究。结果表明，在长期（~ 150 a）的次生林演替过程中，土壤有机碳储量（Cs）、土壤有机碳（SOC）、全氮（TN）和C/N比均迅速增加，并在恢复后50 a左右达到最高值。从这一点上向前的值逐渐稳定，表明SOC和TN积累主要在恢复早期阶段。Cs与SOC、TN、C/N呈极显著正相关（P < 0.01）。土壤中铯的含量在土壤上层高于下层。而Cs的增量变化主要集中在下层土壤中。土壤水储量不是影响土壤中Cs含量的主要因素。结果表明，黄土高原森林演替过程中土壤碳的变化是土壤有机碳和全氮积累的结果，土壤有机碳和全氮的积累能力与森林演替过程呈正相关。皇冠版权所有（c）2013由爱思唯尔B. V.出版保留所有权利。
Land-use change resulting from natural restoration probably enhances the carbon sequestration capacity of terrestrial ecosystems. To explore those factors which foster changes in the soil carbon pool in forest restoration, a study comparing soil organic carbon at different vegetation succession stages along a 150-year chronosequence was conducted in the Ziwuling forest region located in the central part of the Loess Plateau, China. It showed that in long-term (-150 yr) secondary forest succession the soil organic carbon storage (Cs), soil organic carbon (SOC), total nitrogen (TN), and C/N ratio all increased rapidly and tended to be at their highest at roughly the 50-year restoration mark. From this point onward the values gradually stabilized indicating that the SOC and the TN accumulated mainly in the early restoration stages. The Cs was significantly and positively correlated with the SOC, the TN, and the C/N ratio (P < 0.01). The Cs in the soil was higher in the upper rather than the lower soil layers. However, the increments of the Cs mainly changed in the lower soil layers. Soil water storage was not the key factor influencing the Cs. The results suggested that changes to the Cs were the result of the accumulation of the SOC and the TN during forest succession and this capacity has shown to be positively related to forest succession on the Loess Plateau, China. Crown Copyright (c) 2013 Published by Elsevier B.V. All rights reserved.