Ecosystem carbon storage and soil organic carbon stability in pure and mixed stands of Cunninghamia lanceolata and Michelia macclurei
Ecosystem carbon storage and soil organic carbon stability in pure and mixed stands of Cunninghamia lanceolata and Michelia macclurei
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DOI：
10.1007/s11104-013-1631-2
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发表时间：
2013-02
期刊：
影响因子：
4.9
通讯作者：
Qingkui Wang;Si-long Wang;Micai Zhong
中科院分区：
文献类型：
--
作者：
Qingkui Wang;Si-long Wang;Micai Zhong
背景和目的在全世界，大约2.64亿公顷的森林种植园是单种的。在森林被多次采伐的地区，这种做法已被发现导致土地生产力和土壤肥力下降。为了缓解这些问题，首选混合物种种植园，特别是阔叶树和针叶树物种。在杉木纯种植园中引入火力楠（Michelia maclurei）对生态系统碳储量和土壤有机碳（SOC）稳定性的影响是提高森林固碳和碳循环认识的关键。总的，不稳定的，和柠檬酸类组分（0-40厘米深度）的SOC存储，和SOC的稳定性。与单种C相比，maclurei树的生物量C分别增加了17.9%和14.2%. lanceolata和M. macclurei种植园分别。不同SOC组分的储存量在单种C.杉木和混交林。土壤有机碳的稳定性没有受到影响，但在10-20 cm和20-40 cm土壤深度上，三种人工林的土壤有机碳稳定性存在差异。
Background and aimsAcross the world, about 264 million ha forest plantations are monospecific. This practice has been found to cause site productivity and soil fertility decline in the regions where forests have been harvested several times. To mitigate these problems, mixed-species plantations, especially with broadleaved and coniferous species, are preferred. Understanding the effects of introducing broadleaved tree in monospecific coniferous plantation on ecosystem carbon (C) storage and soil organic C (SOC) stability is critical to improve our understanding of forest C sequestration and C cycle.MethodsPlots were established in subtropical plantations with a randomized block design to examine the influence of introducing Michelia macclurei trees into pure Cunninghamia lanceolata plantation on biomass C storage, SOC storage of total, labile, and recalcitrant fractions (0–40 cm depth), and SOC stability.ResultsIntroducing M. macclurei trees increased biomass C by 17.9 % and 14.2 % compared with monospecific C. lanceolata and M. macclurei plantations, respectively. Storage of different SOC fractions was not significantly different between monospecific C. lanceolata and mixed plantations. SOC stability in bulk soils was not affected, although it differed in 10–20 cm and 20–40 cm soil depth among three plantations.ConclusionsMixed species plantations can increase C sequestration, and in the subtropical forest ecosystem examined this was mainly attributed to an increase in biomass C.