| 不同施肥制度对稻田土壤微生物的影响研究 |
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| 引用本文： | 谭周进,周卫军,张杨珠,曾希柏,肖嫩群,刘强.不同施肥制度对稻田土壤微生物的影响研究[J].植物营养与肥料学报,2007,13(3):430-435. |
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| 作者姓名： | 谭周进 周卫军 张杨珠 曾希柏 肖嫩群 刘强 |
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| 作者单位： | 1.湖南农业大学资源与环境微生物研究所 湖南长沙410128; |
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| 基金项目： | 国家重点基础研究发展计划(973计划) |
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| 摘 要： | 湖南省进行了18年土壤肥力与施肥效益监测的长期定位试验,就3个定位点不同施肥制度对稻田土壤微生物的影响进行了研究。结果表明,长期施肥土壤的有机质含量与细菌总数及放线菌总数之间无直接相关,土壤有机质含量的高低并不能作为评价土壤微生物多少的指标;真菌数量可反映土壤的肥力水平,土壤真菌数量可用来评价不同施肥制度的效果。施用30%有机肥和习惯施肥处理的氮素养分和硝化细菌数量较多,硝化细菌数量与有机质含量也无相关;长期施用大量有机肥(60%)的土壤反硝化细菌数量高于其它施肥处理,这可能与长期使用大量有机肥后土壤氧化还原电位降低有关。硫化细菌和反硫化细菌数量与土壤有机质含量无直接相关性,施肥可影响土壤硫素的供应。施用单质氮肥多的土壤,氨化细菌数量较多,而有机肥施用量高的土壤,氨化细菌数量较少。无肥区的土壤微生物活度最低,60%有机肥处理的土壤微生物活度最高。土壤有机质含量高,土壤微生物活度也高,两者呈正相关。保持农业土壤的健康要从多方面来进行联合调控,而不是单纯的采用某一农业技术来进行。
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| 关 键 词： | 施肥制度 土壤微生物 微生物活度 长期定位 |
| 文章编号： | 1008-505X（2007）03-0430-06 |
| 收稿时间： | 2006-01-16 |
| 修稿时间： | 2006年1月16日 |
Effect of fertilization systems on microbes in the paddy soil |
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| TAN Zhou-jin,ZHOU Wei-jun,ZHANG Yang-zhu,ZENG Xi-bo,XIAO Nen-qun,LIU Qiang.Effect of fertilization systems on microbes in the paddy soil[J].Plant Nutrition and Fertilizer Science,2007,13(3):430-435. |
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| Authors: | TAN Zhou-jin ZHOU Wei-jun ZHANG Yang-zhu ZENG Xi-bo XIAO Nen-qun LIU Qiang |
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| Affiliation: | 1.Institute of Resource and Environment Microbiology;Hunan Agricultural University;Changsha 410128;China; |
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| Abstract: | The effects of different fertilization systems on the microbes were studied with an 18 year long-term fix position experiment. The soil samples were collected from three sites in Hunan province. The results showed that the organic matter content was not directly correlated to the numbers of bacteria and actinomycetes and could not be used as the indicator for the soil microbes. The quantities of fungi could be used as the indicator for soil fertility based on this study. The nitrogen concentration and nitrifying bacteria in the soils treated with 30% organic matter or traditional fertilization were higher than those in the other soils. Nitrifying bacteria was not related to the organic matter content. Denitrifying bacteria in the soil treated with 60 % organic matter was higher than the others due to the lower oxygen concentration. The sulfur nutrient was significantly affected by fertilization system. The nitrogen fertilization could improve the quantities of ammonification bacteria in soil. Fertilization system significantly influenced the microbial activities in soil. The microbial activities in soil without fertilization were the lowest. The microbial activities increased with increasing of soil organic matter. Soil quality must be improved using multi-agricultural technologies instead of single technology. |
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| Keywords: | fertilization systems soil microorganism microbial activities long-term experiment |
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