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[1]王璐,张伟东,王雪峰,等.土壤线虫群落对大连城市森林凋落物分解的影响[J].应用与环境生物学报,2015,21(05):933-939.[doi:10.3724/SP.J.1145.2015.05039]
 WANG Lu,ZHANG Weidong,WANG Xuefeng,et al.Effects of soil nematodes communities on litter decomposition in urban forest of Dalian[J].Chinese Journal of Applied & Environmental Biology,2015,21(05):933-939.[doi:10.3724/SP.J.1145.2015.05039]
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土壤线虫群落对大连城市森林凋落物分解的影响()
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《应用与环境生物学报》[ISSN:1006-687X/CN:51-1482/Q]

卷:
21卷
期数:
2015年05期
页码:
933-939
栏目:
研究论文
出版日期:
2015-10-25

文章信息/Info

Title:
Effects of soil nematodes communities on litter decomposition in urban forest of Dalian
作者:
王璐 张伟东 王雪峰 李伟丽
1辽宁师范大学生命科学学院 大连 116021 2中国科学院东北地理与农业生态研究所 长春 130102
Author(s):
WANG Lu ZHANG Weidong WANG Xuefeng LI Weili
1Collage of Life Science, Liaoning Normal University, Dalian 116021, China 2Northeast Institute of Geography and Agricultural Ecology, Chinese Academy of Sciences, Changchun 130102, China
关键词:
土壤线虫群落凋落物分解分解袋相对密度释放率贡献率
Keywords:
soil nematodes communities litter decomposition litter bags relative density release rate contribution rate
分类号:
S154.5
DOI:
10.3724/SP.J.1145.2015.05039
文献标志码:
A
摘要:
以大连国家森林公园凋落物作为分解基质,采用不同网孔的分解袋法,开展土壤线虫群落对城市森林凋落物分解和主要养分元素释放的影响研究. 研究期间共鉴定出4 418条土壤线虫,分别隶属于39个属. 0.1 mm网袋土壤线虫类群相对密度年均值为7.34目/g凋落物干重,个体相对密度年均值为1.55个/g凋落物干重,显著高于0.02 mm网袋(0.49目/g凋落物干重、0.21个/g凋落物干重),并且0.1 mm网袋中的线虫数量远远大于0.02 mm网袋中的线虫数量,由此视0.1 mm网袋凋落物分解由土壤线虫和微生物共同作用,而0.02 mm网袋基本排除了土壤线虫对袋内凋落物分解的影响. 0.1 mm网袋凋落物失重率和C、P元素释放率明显高于0.02 mm网袋,表明土壤线虫在一定程度上促进凋落物分解和养分元素释放. 两种不同网袋凋落物失重率和元素释放率的差异比较结果显示土壤线虫对凋落物分解的贡献率年均值约为24%,而对元素释放率的影响不同,其中对N元素释放率的影响较大,对K元素释放率的影响作用最小. 本研究表明,土壤线虫群落对城市森林凋落物分解和主要养分元素释放有显著影响,其中对凋落物分解速率和N元素释放具有明显的促进作用.
Abstract:
In order to further expound the effect of soil nematodes on litter decomposition in urban forest, this study investigated the responses of soil nematodes communities to litter decomposition by litterbags technology at different mesh sizes in Dalian National Forest Park. Soil nematodes community composition, decomposition rate of litter and nutrient release were also analyzed. It found a total of 4 418 nematodes from 39 genera. Higher relative density of soil nematodes was found in the bags with 0.1 mm mesh size (1.55 individuals and 7.34 orders per g of dry litter) compared to the bags with 0.02 mm mesh size (0.21 individuals and 0.49 orders per g of dry litter). There were very few soil nematodes in the 0.02 mm litter bags. Thus we regarded that soil nematodes only affected the 0.1 mm litter bags. The mass loss rates as well as C and P release rates was higher in litter bags with 0.1 mm mesh size than in those with 0.02 mm mesh size, indicating a significant influence of soil nematodes on mass loss and nutrient release. The contribution of soil nematodes to the litter mass loss was about 24%. The effect of soil nematodes on the nutrient release rates differed among elements. The soil nematodes had a bigger influence on the release rate of N than that of other elements, whereas the influence on K release rate was the lowest. The results showed that soil nematodes communities has a significant effect on the litter decomposition and nutrient release of the forest litter in Dalian city, especially promoting the mass loss rates and N release rates.

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备注/Memo

备注/Memo:
国家自然科学基金项目(41201245)资助 Supported by the National Natural Science Foundation of China (41201245)
更新日期/Last Update: 2015-10-29