| 不同施肥处理对水稻养分吸收和稻田土壤微生物生态特性的影响 |
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| 引用本文： | 张奇春,王光火,方斌. 不同施肥处理对水稻养分吸收和稻田土壤微生物生态特性的影响[J]. 土壤学报, 2005, 42(1): 116-121 |
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| 作者姓名： | 张奇春 王光火 方斌 |
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| 作者单位： | 浙江大学环境与资源学院,杭州,310029 |
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| 基金项目： | 国际肥料科学协会(IFA)、磷钾研究所(PPI)、国际钾研究所(IPI)资助项目 |
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| 摘 要： | 在水稻长期定位肥料试验条件下研究了不同施肥处理对水稻养分吸收动态变化和土壤微生物生态特性的影响。该长期定位试验设有CK(不施肥对照)和PK、NK、NP、NPK五个肥料处理和常规稻、杂交稻品种对比处理。研究结果表明,水稻产量分别与水稻吸氮总量、吸磷总量和吸钾总量显著相关;在连续种植水稻条件下,水稻对所缺养分的吸收量呈逐年下降趋势,表明缺肥区土壤相应的有效养分库消耗很快。土壤微生物特性测定表明,不平衡施肥降低了土壤微生物量N,使微生物量C/N比增加。与缺肥区相比较,NPK配施处理促进了土壤微生物的功能多样性,同时增加了土壤微生物总量。可见,土壤中养分不足或供应不平衡,不仅影响水稻养分的吸收,而且对土壤微生物总量和群落多样性产生重要影响。
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| 关 键 词： | 水稻 土壤微生物 施肥 多样性 |
| 收稿时间： | 2004-04-01 |
| 修稿时间： | 2004-08-25 |
INFLUENCE OF FERTILIZATION TREATMENT ON NUTRIENTS UPTAKE BY RICE AND SOIL ECOLOGICAL CHARACTERISTICS OF SOIL MICROORGANISM IN PADDY FIELD |
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| Zhang Qichun,Wang Guanghuo and Fang Bin. INFLUENCE OF FERTILIZATION TREATMENT ON NUTRIENTS UPTAKE BY RICE AND SOIL ECOLOGICAL CHARACTERISTICS OF SOIL MICROORGANISM IN PADDY FIELD[J]. Acta Pedologica Sinica, 2005, 42(1): 116-121 |
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| Authors: | Zhang Qichun Wang Guanghuo Fang Bin |
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| Affiliation: | College of Natural Resources and Environmental Sciences, Zhejiang University, Hangzhou 310029, China;College of Natural Resources and Environmental Sciences, Zhejiang University, Hangzhou 310029, China;College of Natural Resources and Environmental Sciences, Zhejiang University, Hangzhou 310029, China |
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| Abstract: | Investigations were conducted on dynamics of grain yields and nutrients uptake of rice,and ecological characteristics of soil microorganisms in a paddy field under long-term fertilization experiment,which was designed to have five fertilization treatments,CK (control),PK,NK, NP,and NPK,and two crop treatments,conventional rice and hybrid rice. The results show that grain yield of rice was positively correlated with the total uptakes of N,P and K,and the soil available nutrient pool depleted rapidly under consecutive cropping without fertilization. The results also show that balanced N,P and K application improved functional diversity of soil microbes and increased total microbial biomass of the soil. Unbalanced fertilization decreased microbial N but increased C/N ratio of the soil microbial biomass. It is found that soil nutrient deficiency and unbalanced fertilization to rice crops have a negative effect on diversity of microbial communities and total microbial biomass in the soil. |
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| Keywords: | Rice Soil microorganism Fertilization Diversity |
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