| Soil animals and nitrogen mineralization under sand-fixation planta- tions in Zhanggutai region, China |
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| 基金项目： | 国家自然科学基金，国家科技发展计划 |
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| 摘 要： | The effects of soil animals on soil nitrogen （N） mineralization and its availability were studied by investigating soil animal groups and their amounts of macro-faunas sorted by hand, and middle and microfaunas distinguished with Tullgren and Baermann methods under three Pinus sylvestris var. mongolica Litv. plantations in Zhanggutai sandy land, China. In addition, soil N mineralization rate was also measured with PVC closed-top tube in situ incubation method. The soil animals collected during growing season belonged to 13 orders, 5 groups, 4 phyla, whose average density was 86 249.17 individuals-m^-2. There were significant differences in soil animal species, densities, diversities and evenness among three plantations. Permanent grazing resulted in decrease of soil animal species and diversity. The average ammonification, nitrification and mineralization rates were 0.48 g：m^-2·a^-1, 3.68 g·m^-2·a^-1 and 4.16 g·m^-2·a^-1, respectively. The ammonification rate in near-mature forest was higher than that in middle-age forests, while the order of nitrification and net mineralization rates was： middle-age forest without grazing 〈 middle-age forest with grazing 〈 near-mature forest with grazing （P〈0.05）. Soil N mineralization rate increased with soil animal amounts, but no significant relationship with diversity. The contribution of soil animals to N mineralization was different for different ecosystems due to influences of complex factors including grazing, soil characteristics, the quality and amount of litter on N mineralization.
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| 关 键 词： | 科尔沁沙地 章古台地区 固沙造林 土壤动物 N矿化作用 樟子松 |
| 收稿时间： | 2006-09-06 |
| 修稿时间： | 2006-12-12 |
Soil animals and nitrogen mineralization under sand-fixation plantations in Zhanggutai region,China |
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| Authors: | Chen Fu-sheng Zeng De-hui Hu Xiao-fei Chen Guang-sheng Yu Zhan-yuan |
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| Institution: | (1) Daqinggou Ecological Station, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, 110016, P. R. China;(2) College of Life Sciences, Nanchang University, Nanchang, 330031, P. R. China;(3) Ecosystem Sciences & Regional Analysis Laboratory, School of Forestry and Wildlife Sciences, Auburn University, AL 36830, USA |
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| Abstract: | The effects of soil animals on soil nitrogen (N) mineralization and its availability were studied by investigating soil animal
groups and their amounts of macro-faunas sorted by hand, and middle and microfaunas distinguished with Tullgren and Baermann
methods under three Pinus sylvestris var. mongolica Litv. plantations in Zhanggutai sandy land, China. In addition, soil N mineralization rate was also measured with PVC closed-top
tube in situ incubation method. The soil animals collected during growing season belonged to 13 orders, 5 groups, 4 phyla, whose average
density was 86 249.17 individuals·m−2. There were significant differences in soil animal species, densities, diversities and evenness among three plantations.
Permanent grazing resulted in decrease of soil animal species and diversity. The average ammonification, nitrification and
mineralization rates were 0.48 g·m−2·a−1, 3.68 g·m−2·a−1 and 4.16 g·m−2·a−1, respectively. The ammonification rate in near-mature forest was higher than that in middle-age forests, while the order
of nitrification and net mineralization rates was: middle-age forest without grazing < middle-age forest with grazing < near-mature
forest with grazing (P<0.05). Soil N mineralization rate increased with soil animal amounts, but no significant relationship with diversity. The
contribution of soil animals to N mineralization was different for different ecosystems due to influences of complex factors
including grazing, soil characteristics, the quality and amount of litter on N mineralization.
Foundation project: This research was supported by National Natural Science Foundation of China (30471377 & 30600473) and
the National Programs for Science and Technology Development of China (No. 2005BA517A03).
Electronic supplementary material is available in the online version of this article at
Biography: CHEN Fu-sheng (1973–), male, Ph.D., associate professor at College of Life Sciences, Nanchang University, Nanchang
330031, P. R. China. |
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| Keywords: | Soil animals N mineralization Pinus sylvestris var mongolica Litv Zhanggutai sandy land |
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