| Variation of Soil Microbial Biomass and Enzyme Activities at Different Growth Stages of Rice （Oryza sativa） |
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| 作者姓名： | ZENG Lu-sheng LIAO Min CHEN Cheng-li HUANG Chang-yong |
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| 作者单位： | Department of Resources Science, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310029, China |
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| 基金项目： | ACKN0WLEDGEMENTS This work was supported by the Science Foundation of China National Natural （40201026 and 40371063） and China National Basic Research Program （2002CB410804）. We wish to thank the College of Agriculture and Biotechnology, Zhejiang University, for the generous supply of rice seeds. |
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| 摘 要： | A pot experiment was conducted under submerged conditions with hybrid rice Zhenong 7 to study the variation in the soil microbial biomass carbon （Cmic）, soil microbial biomass nitrogen （Nmic）, soil respiration rate, soil microbial metabolic quotient, soil enzyme activities, chlorophyll content, proline content and peroxidase activity （POD） in rice leaf at different growth stages. The soil Cmic, Nmic and soil respiration rate significantly increased at the early stage and then declined during rice growth, but ascended slightly at maturity. However, soil metabolic quotient declined at all the stages. Soil urease activity increased at first and then decreased, while acid phosphatase and dehydrogenase activities descended before ascended and then descended again. Soil urease activity and acid phosphatase activity showed a peak value at the tillering stage about 30 days after rice transplanting, but the peak value of dehydrogenase activity emerged at about 50 days after rice transplanting and the three soil enzymatic activities were significantly different at the different developmental stages. As rice growing, chlorophyll content in rice leaf descended at the early stage then ascended and a peak value appeared at about the 70th after rice transplanting, after that declined drastically, while POD activity increased gradually, but proline content declined gradually. There was a slight relation between rice physiological indices and soil biochemical indices, which indicated that soil biochemical characteristics were affected significantly by rice growth in the interaction system of the rice. soil and microorganisms.
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| 关 键 词： | 水稻 生活力 土壤 叶绿素 酶 |
| 收稿时间： | 2005-08-22 |
| 修稿时间： | 2005-12-10 |
Variation of Soil Microbial Biomass and Enzyme Activities at Different Growth Stages of Rice (Oryza sativa) |
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| ZENG Lu-sheng LIAO Min CHEN Cheng-li HUANG Chang-yong.Variation of Soil Microbial Biomass and Enzyme Activities at Different Growth Stages of Rice (Oryza sativa)[J].Rice science,2005,12(4):283-288. |
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| Authors: | ZENG;Lu-sheng;LIAO;Min;CHEN;Cheng-li;HUANG;Chang-yong |
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| Institution: | Department of Resources Science, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310029, China |
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| Abstract: | A pot experiment was conducted under submerged conditions with hybrid rice Zhenong 7 to study the variation in the soil microbial biomass carbon (Cmic), soil microbial biomass nitrogen (Nmic), soil respiration rate, soil microbial metabolic quotient, soil enzyme activities, chlorophyll content, proline content and peroxidase activity (POD) in rice leaf at different growth stages. The soil Cmic, Nmic and soil respiration rate significantly increased at the early stage and then declined during rice growth, but ascended slightly at maturity. However, soil metabolic quotient declined at all the stages. Soil urease activity increased at first and then decreased, while acid phosphatase and dehydrogenase activities descended before ascended and then descended again. Soil urease activity and acid phosphatase activity showed a peak value at the tillering stage about 30 days after rice transplanting, but the peak value of dehydrogenase activity emerged at about 50 days after rice transplanting and the three soil enzymatic activities were significantly different at the different developmental stages. As rice growing, chlorophyll content in rice leaf descended at the early stage then ascended and a peak value appeared at about the 70th after rice transplanting, after that declined drastically, while POD activity increased gradually, but proline content declined gradually. There was a slight relation between rice physiological indices and soil biochemical indices, which indicated that soil biochemical characteristics were affected significantly by rice growth in the interaction system of the rice, soil and microorganisms. |
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| Keywords: | rice soil microbial biomass soil metabolic quotient soil enzyme activity chlorophyll proline peroxidase |
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