| 京郊保护地土壤氮素矿化研究 |
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| 引用本文： | 胡道龙,崔骁勇,王艳杰,付桦,邹国元. 京郊保护地土壤氮素矿化研究[J]. 华北农学报, 2008, 23(5) |
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| 作者姓名： | 胡道龙 崔骁勇 王艳杰 付桦 邹国元 |
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| 作者单位： | 中国科学院研究生院 资源与环境学院,北京,100049;北京市农林科学院 植物营养与资源研究所,北京,100097;中国科学院研究生院 资源与环境学院,北京,100049;北京市农林科学院 植物营养与资源研究所,北京,100097;首都师范大学 资源环境与地理信息系统北京重点实验室,北京,100037;首都师范大学 资源环境与地理信息系统北京重点实验室,北京,100037;北京市农林科学院 植物营养与资源研究所,北京,100097 |
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| 基金项目： | 国家科技支撑计划课题，北京市自然科学基金，北京市科技项目 |
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| 摘 要： | 利用好气淋洗培养法研究了京郊蔬菜保护地耕层土壤氮素矿化状况.结果表明:110个土壤样品2周培养期间氮矿化量分布在2.50～112.00 mg/kg,均值为17.50 mg/kg,81%的样品集中在2.50～23.99 mg/kg,变化范围较大,土壤氮素矿化量与有机质、全氮含量显著正相关,与碱解氮不相关;筛选其中45个土壤样品进行21周的长期好气培养,土壤累计氮矿化量变化范围是19.00～337.00 mg/kg,均值为102.00 mg/kg.表层土壤氮矿化速率的变化可分为3个阶段,第一阶段(0～21 d),矿化速率较快;第二阶段(21～91 d),矿化速率趋缓;第三阶段(91 d以后),矿化速率保持稳定.21周内京郊保护地土壤平均可供氮量为214.00 mg/kg(相当于856.00 kg/hm2),超过了保护地蔬菜正常生长当季所需氮量.
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| 关 键 词： | 保护地 氮矿化量 氮矿化速率 |
Study on Soil Nitrogen Mineralization in Protected Vegetable Fields of Beijing Suburb |
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| HU Dao-long,CUI Xiao-yong,WANG Yan-jie,FU Hua,ZOU Guo-yuan. Study on Soil Nitrogen Mineralization in Protected Vegetable Fields of Beijing Suburb[J]. Acta Agriculturae Boreali-Sinica, 2008, 23(5) |
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| Authors: | HU Dao-long CUI Xiao-yong WANG Yan-jie FU Hua ZOU Guo-yuan |
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| Affiliation: | HU Dao-long1,2,CUI Xiao-yong1,WANG Yan-jie2,3,FU Hua3,ZOU Guo-yuan2 (1.Colleg of Resource , Environment,Graduate School of Chinese Academy of Sciences,Beijing 100049,China,2.Institution of Plant Nutrition , Natural Resources,Beijing Academy of Agriculture , Forestry Sciences,Beijing 100097,3.Resource,Environment , GIS Key Laboratory of Beijing,Department of Geography,Capital Normal University,Beijing 100037,China) |
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| Abstract: | To characterize soil nitrogen mineralization in protected vegetable fields of Beijing suburbs,110 soil samples were studied by both short-term and long-term aerobic incubation with intermittent leaching.Results showed that the average quantity of mineralized nitrogen of all the samples was 17.50 mg/kg,ranging from 2.50 to 112.00 mg/kg,but 81 percent of the samples were between 2.50 and 23.99 mg/kg in two weeks,indicating a relatively consistent mineralization capacity of the soils in protected vegetable fie... |
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| Keywords: | Protected vegetable fields Quantity of the mineralized nitrogen Nitrogen mineralization rate |
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