| 红壤微生物量氮的周转期及其研究意义 |
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| 引用本文： | 姚槐应,何振立,黄昌勇.红壤微生物量氮的周转期及其研究意义[J].土壤学报,1999,36(3):387-394. |
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| 作者姓名： | 姚槐应 何振立 黄昌勇 |
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| 作者单位： | 浙江农业大学土化系,杭州,310029 |
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| 基金项目： | 中国科学院资助项目，中国科学院实验室基金，，，， |
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| 摘 要： | 本文采用＾１５Ｎ标记底物法测定了三种不同肥力水平的红壤中微生物量氮周转 速率，结果表明三种红壤中微生物量氮的周期转分别为６３天，８９在和２５１天。
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| 关 键 词： | 红壤 微生物量氮 周转期 |
| 收稿时间： | 1997/10/10 0:00:00 |
| 修稿时间： | 1997-10-10 |
TURNOVER PERIOD OF MICROBIAL BIOMASS NITROGEN IN RED SOILS AND ITS SIGNIFICANCE IN SOIL FERTILITY EVALUATION |
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| Yao Huai-ying,He Zhen-li and Huang Chang-yong.TURNOVER PERIOD OF MICROBIAL BIOMASS NITROGEN IN RED SOILS AND ITS SIGNIFICANCE IN SOIL FERTILITY EVALUATION[J].Acta Pedologica Sinica,1999,36(3):387-394. |
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| Authors: | Yao Huai-ying He Zhen-li and Huang Chang-yong |
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| Institution: | Department of Soil Science and Agricultural Chemistry, Thejiang Agricultural University, Hangzhou 310029;Department of Soil Science and Agricultural Chemistry, Thejiang Agricultural University, Hangzhou 310029;Department of Soil Science and Agricultural Chemistry, Thejiang Agricultural University, Hangzhou 310029 |
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| Abstract: | An isotope (15N) labelling technique was used to estimate the turnover of soil nitrogen through microbial biomass in red soils. The turnover times of soil nitrogen in microbial biomass were 251, 89,and 63 days, for the long-term cultivated red clayey soil (30 years of tea orchard),mid-term cultivated red clayey soil (4 years citrus orchard) and short-term cultivated red sandy soil (3 years upland),respectively. The annual fluxes of soil nitrogen through microbial biomass were 1.5 to 6 times of the microbial biomass nitrogen itself. The microbial turnover rate of soil nitrogen was closely related to the soil organic matter, and it was higher in sandy soil than in clayey soil. Obviously, microbial biomass turnover of soil nitrogen plays an important role in the availability, retaining and accumulation of soil nitrogen in red soils. |
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| Keywords: | Red soils Microbial biomass nitrogen Turnover time |
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