| 蚯蚓对不同分解阶段有机质的响应 |
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| 作者姓名： | LI Jian-Xiong ZHANG Wei-Xin LIAO Chong-Hui YANG Yue-Ping FU Sheng-Lei |
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| 作者单位： | LI Jian-Xiong,LIAO Chong-Hui,YANG Yue-Ping(Guangdong Entomological Institute,Guangdong Academy of Bciences,Guangzhou 510260 (China));ZHANG Wei-Xin(Institute of Ecology,South China Botanical Garden,Chinese Academy of Sciences,Guan9zhou 510650 (China);Graduate University of the Chinese Academy of Sciences,Beijing 100049 (China));FU Sheng-Lei(Institute of Ecology,South China Botanical Garden,Chinese Academy of Sciences,Guan9zhou 510650 (China))
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| 基金项目： | 国家自然科学基金，the Department of Science and Technology of Guangdong Province;China，the Open Foundation of Heshan Hilly Land Interdisciplinary Experimental Station of the Chinese Academy of Sciences (CAS)，the 100 Talents Program of CAS |
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| 摘 要： | This study was conducted to examine the responses of earthworms to soil organic matter and litter at different decomposition stages and their contributions in litter decomposition processes in southern subtropical areas of China. Two plantations were selected as the study sites: Site Ⅰ was dominated by the exotic endogeic earthworm species Ocnerodrilus occidentalis; Site Ⅱ was dominated by epigeic species Amynthas corticis. After the fallen litter and earthworms were removed or expelled, four treatments were set up as: reserving the top soil (0-5 cm, equal to H layer) (H), removing the top soil and adding fresh litter (Le), removing the top soil and adding semi-decomposed litter (Li), and a control with no top soil nor any litter (CK). Five randomized blocks that were enclosed with nylon nets on the top were set up in each site, and then the four treatments were arranged randomly in each block. After 2-3 months, earthworms were collected using the formalin method. The results showed that Ocnerodrilus occidentalis preferred Treatment H though it was found in Treatments Le and Li as well; Amynthas corticis preferred Treatment Li though sometimes it also appeared in Treatment H; and Amynthas sp., another epigeic species, was mainly present under Treatment Le and only appeared in Treatment H occasionally. These findings confirmed that earthworm species belonging to different ecological groups had different responses to organic matter at different decomposition stages. The impacts of earthworm communities dominated by O.occidentalis mainly appeared at the later periods of litter decomposition.
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| 关 键 词： | 土壤有机质 分解过程 蚯蚓 随机区组 亚热带地区 有机物分解 福尔马林 落叶分解 |
| 收稿时间： | 17 October 2008 |
Responses of earthworms to organic matter at different stages of decomposition |
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| LI Jian-Xiong,ZHANG Wei-Xin,LIAO Chong-Hui,YANG Yue-Ping,FU Sheng-Lei.Responses of earthworms to organic matter at different stages of decomposition[J].Pedosphere,2009,19(3):382-388. |
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| Authors: | LI Jian-Xiong ZHANG Wei-Xin LIAO Chong-Hui YANG Yue-Ping and FU Sheng-Lei |
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| Institution: | Guangdong Entomological Institute, Guangdong Academy of Sciences, Guangzhou 510260 (China);Institute of Ecology, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650 (China);Graduate University of the Chinese Academy of Sciences, Beijing 100049 (China);Guangdong Entomological Institute, Guangdong Academy of Sciences, Guangzhou 510260 (China);Guangdong Entomological Institute, Guangdong Academy of Sciences, Guangzhou 510260 (China);Institute of Ecology, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650 (China) |
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| Abstract: | This study was conducted to examine the responses of earthworms to soil organic matter and litter at different decomposition stages and their contributions in litter decomposition processes in southern subtropical areas of China.Two plantations were selected as the study sites:Site I was dominated by the exotic endogeic earthworm species Ocnerodrilus occidentalis;Site II was dominated by epigeie species Amynthas cortieis.After the fallen litter and earthworms were removed or expelled,four treatments were set up as:reserving the top soil (0-5 cm,equal to H layer) (H),removing the top soil and adding fresh litter (Le),removing the top soil and adding semi-decomposed litter (Li),and a control with no top soil nor any litter (CK).Five randomized blocks that were enclosed with nylon nets on the top were set up in each site,and then the four treatments were arranged randomly in each block.After 2-3 months,earthworms were collected using the formalin method.The results showed that Ocnerodrilus occidentalis preferred Treatment H though it was found in Treatments Le and Li us well;Amynthas corticis preferred Treatment Li though sometimes it also appeared in Treatment H;and Amynthas sp.,another epigeic species,was mainly present under Treatment Le and only appeared in Treatment H occasionally.These findings confirmed that earthworm species belonging to different ecological groups had different responses to organic matter at different decomposition stages.The impacts of earthworm communities dominated by O.occidentalis mainly appeared at the later periods of litter decomposition. |
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| Keywords: | decomposition stage earthworm litter soil organic matter |
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