| 配施有机肥提高化肥氮利用效率的微生物作用机制研究 |
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| 引用本文： | 朱菜红,董彩霞,沈其荣,徐阳春.配施有机肥提高化肥氮利用效率的微生物作用机制研究[J].植物营养与肥料学报,2010,16(2):282-288. |
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| 作者姓名： | 朱菜红 董彩霞 沈其荣 徐阳春 |
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| 作者单位： | 1.南京农业大学资源与环境学院,江苏省固体有机废弃物资源化高技术研究重点实验室,江苏南京 210095 |
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| 基金项目： | 科技部科研项目，农业部农业公益性行业科研专项 |
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| 摘 要： | 采用15N示踪技术和盆栽试验研究了水稻生长期间不同施肥处理土壤微生物量氮的动态变化,探讨了配施有机肥提高化肥氮利用率的微生物作用机制。结果表明,在水稻生育前期,化肥配施鸡粪堆肥、猪粪堆肥和酒糟堆肥较化肥单施均提高了土壤微生物对化肥15N的固持率,降低了土壤矿质态15N含量。而随水稻生育进程推进,在先前被微生物固持的化肥15N化肥配施鸡粪堆肥、猪粪堆肥和酒糟堆肥处理分别有87%、81%和81%被释放,增加了同期水稻对化肥15N的吸收量。化肥配施鸡粪堆肥、猪粪堆肥和酒糟堆肥,化肥15N利用率均超过60%,而单施化肥利用率仅39%。可见,配施有机肥提高化肥氮利用率,其机制之一是通过促进土壤微生物对化肥氮的有效调控,使化肥氮更好地被转化利用。
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| 关 键 词： | 水稻 微生物量氮 微生物量15N 化肥氮利用率 |
| 收稿时间： | 2009-3-9 |
Microbial mechanism on enhancement of inorganic fertilizer-N use efficiency for combined use of inorganic and organic fertilizers |
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| ZHU Cai-hong,DONG Cai-xia,SHEN Qi-rong,XU Yang-chun.Microbial mechanism on enhancement of inorganic fertilizer-N use efficiency for combined use of inorganic and organic fertilizers[J].Plant Nutrition and Fertilizer Science,2010,16(2):282-288. |
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| Authors: | ZHU Cai-hong DONG Cai-xia SHEN Qi-rong XU Yang-chun |
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| Institution: | 1.College of Resources and Environmental Sciences,Nanjing Agricultural University/Jiangsu Key Laboratory for Solid Organic Waste Utilization,Nanjing 210095,China |
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| Abstract: | Based on 15N isotope tracer and a pot experiment,the dynamics of soil microbial biomass N during different rice growing stages under different fertilizer treatments was investigated,and the microbial mechanism on the enhancement of inorganic fertilizer-N use efficiency was discussed.Treatments included (15NH4)2SO4(F) and(15NH4)2SO4 plus either chicken manure(FC),pig manure(FP), or vinasse(FV).The results showed that in the early growth stage of rice,the combined use of(15NH4)2SO4 and chicken manure,pig manu... |
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| Keywords: | rice microbial biomass N microbial 15N use efficiency of inorganic N fertilizer |
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