| 氮肥对镉污染土壤镉氮含量变化的影响研究 |
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| 引用本文： | 李旭军,赵鲁,史胜红,刘安辉,谭晓东,许丽,蒋增.氮肥对镉污染土壤镉氮含量变化的影响研究[J].中国农学通报,2014,30(6):163-168. |
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| 作者姓名： | 李旭军 赵鲁 史胜红 刘安辉 谭晓东 许丽 蒋增 |
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| 作者单位： | 1. 北京市土肥工作站2. 轻工业环境保护研究所 |
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| 基金项目： | 重金属污染土壤对主要农作物品质影响的评价研究. |
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| 摘 要： | 为了探讨氮肥种类和用量对土壤无机氮及土壤有效态镉含量的影响，采用恒温培养的方法，研究不同尿素用量及硫酸铵、硝酸钙、控释尿素和双氰胺（硝化抑制剂，简称DCD）对土壤镉氮含量变化的影响差异。结果表明，高施氮量的尿素处理具有较高的铵态氮和硝态氮含量。DCD能明显抑制硫酸铵的硝化作用。控释尿素通过自身包膜的作用，减缓了尿素向铵态氮和硝态氮转化的趋势。氮素施入土壤后，在微生物的作用下，会发生水解反应和硝化反应，使土壤pH发生变化，从而使土壤中有效态镉含量升高或降低。
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| 关 键 词： | 稻田 稻田 地表水 有机肥 NO3--N NH4+-N 径流 渗漏 |
| 收稿时间： | 5/2/2013 12:00:00 AM |
| 修稿时间： | 2013/5/27 0:00:00 |
Effect of Nitrogen Fertilizer on Content of Cd and N on Cadmium Contaminated Soil |
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| Li Xujun,Zhao Lu,Shi Shenghong,Liu Anhui,Tan Xiaodong,Xu Li,Jiang Zeng.Effect of Nitrogen Fertilizer on Content of Cd and N on Cadmium Contaminated Soil[J].Chinese Agricultural Science Bulletin,2014,30(6):163-168. |
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| Authors: | Li Xujun Zhao Lu Shi Shenghong Liu Anhui Tan Xiaodong Xu Li Jiang Zeng |
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| Institution: | 1Beijing Soil and Fertilizer Working Station, Beijing 100029; 2Environmental Protection Institute of Light Industry, Beijing 100089) |
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| Abstract: | In order to explore the effect of kind and amount of nitrogen fertilizer on the content of soil inorganic nitrogen and available cadmium, a soil culture experiment was conducted to study the effects of different dosage of urea and ammonium sulphate, calcium nitrate, controlled release urea and dicyandiamide （a kind of nitrification inhibitor, hereinafter referred to as ＇ DCD＇） on change of the content of cadmium and nitrogen in the soil. The results showed that： high N application processing had higher ammonium nitrogen and nitrate nitrogen content, for the different dosage of urea treatment. DCD significantly inhibited nitrification of ammonium sulfate. With coats outside, controlled release urea, slowed down the ammonium nitrogen and nitrate nitrogen transformation trend. With the help of microorganisms, hydrolysis reaction and nitration reaction would happen after the application of nitrogen fertilizer, which made the soil pH change in response. And that change of soil pH made the content of available cadmium get high or low. |
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| Keywords: | soil culture |
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