| 蚯蚓活动对稻麦轮作系统中土壤微生物量碳的影响 |
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| 引用本文： | 胡锋,王霞,李辉信,于建光,王丹丹. 蚯蚓活动对稻麦轮作系统中土壤微生物量碳的影响[J]. 土壤学报, 2005, 42(6): 965-969 |
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| 作者姓名： | 胡锋 王霞 李辉信 于建光 王丹丹 |
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| 作者单位： | 南京农业大学资源与环境科学学院,南京,210095 |
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| 基金项目： | 国家自然科学基金项目(30370286)资助 |
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| 摘 要： | 在建立6 a的稻麦轮作田间小区试验中,研究了2001年稻季至2004年麦季(共6季)蚯蚓活动对土壤微生物量碳(MBC)的影响。本研究设计了秸秆施用方式(混施或表施)×蚯蚓(接种或剔除)以及对照共5个处理,各3个重复。实验结果表明:在该生态系统中,无论采用何种秸秆施用方式,蚯蚓活动均能显著提高土壤MBC(p<0.05)。秸秆的施用会减弱同年内土壤MBC在麦季成熟期高于稻季的趋势,而蚯蚓的作用使该差异变得更显著(p<0.05)。在0~5 cm土层中,蚯蚓对MBC的积极作用在秸秆混施时比表施更明显,在5~10 cm土层中则相反,而在10~20 cm土层中的作用效果基本一致。
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| 关 键 词： | 蚯蚓 土壤微生物量 秸秆 稻麦轮作系统 |
| 收稿时间： | 2004-11-01 |
| 修稿时间： | 2004-11-012005-04-18 |
EFFECTS OF EARTHWORMS ON SOIL MICROBIAL BIOMASS CARBON IN RICE-WHEAT ROTATION AGRO-ECOSYSTEM |
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| Hu Feng,Wang Xi,Li Huixin,Yu Jianguang and Wang Dandan. EFFECTS OF EARTHWORMS ON SOIL MICROBIAL BIOMASS CARBON IN RICE-WHEAT ROTATION AGRO-ECOSYSTEM[J]. Acta Pedologica Sinica, 2005, 42(6): 965-969 |
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| Authors: | Hu Feng Wang Xi Li Huixin Yu Jianguang Wang Dandan |
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| Affiliation: | College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China;College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China;College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China;College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China;College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China |
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| Abstract: | An experiment has been conducted in the Experimental Station of the Nanjing Agricultural University since 1999, with the experimental fields separated into plots (2.8 m×1.0 m×0.6 m) by concrete frames.The soil in the plots was sandy loam soil (Orthic aquisols) collected from Rugao County, Jiangsu Province.The experiment was designed to be rice and wheat rotation with five treatments, i.e.application of corn residues (incorporating or mulching) with or without earthworms and control, and 3 replicates for each treatment.The responses of soil microbial biomass carbon (MBC) to earthworm act ivity had been investigated from the rice season of 2001 to the wheat season of 2004.It was found that MBC significantly increased (p<0.05) in the treatments with earthworms.Generally, the MBC was higher at the maturing stage of wheat than that in the rice season in the same year, however, the difference was notably enhanced (p< 0.05) by earthworm and weakened by input of corn straw.Posit ive effect of earthworms on MBC was more distinct in the 0~5 cm soil layer with corn residues incorporated and in the 5~10 cm soil layer with corn residues mulched.The enhancement of MBC by earthworms was similar in the 10~20 cm soil layer whether corn residue was incorporated or mulched. |
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| Keywords: | Earthworms Soil microbial biomass Crop residues Rice-wheat rotation system |
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