| 菜田施肥(化肥)对地下水氮污染影响的实验研究 |
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| 引用本文： | 董悦安,沈照理,钟佐.菜田施肥(化肥)对地下水氮污染影响的实验研究[J].地球科学,1999,24(1):101-104. |
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| 作者姓名： | 董悦安 沈照理 钟佐 |
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| 作者单位： | [1]中国原有科学研究院核物理所 [2]中国地质大学环境科学系 |
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| 摘 要： | 为研究菜田施肥（化肥）对地下水氮污染的影响，进行了２个土柱模拟菜田施肥（化肥）残存量的实验．结果表明，土柱中化肥残存量的７２．０８％和４７．４４％从渗出水中流出．依据实验数据将实验过程分为３个可能阶段：第１阶段，化肥中的ＮＨ＋４被土壤吸附，并交换出土壤中的Ｋ＋＋Ｎａ＋，Ｃａ２＋和Ｍｇ２＋，使之进入渗出水中；第２阶段，为硝化作用增强的阶段，表现为土柱渗出水中ＮＯ－３的质量浓度比注入水有大幅度增加；第３阶段，为硝化作用强度减弱的阶段，表现为渗出水中ＮＯ－３的质量浓度比注入水增加的幅度减小．
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| 关 键 词： | 氮污染 施肥 土柱模拟实验 |
SOIL COLUMN EXPERIMENT ON NITROGEN POLLUTION OF GROUNDWATER FROM OVER_BURDEN USE OF CHEMICAL FERTILIZER IN VEGETABLE FIELD |
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| Dong Yuean,Shen Zhaoli,Zhong Zuoshen.SOIL COLUMN EXPERIMENT ON NITROGEN POLLUTION OF GROUNDWATER FROM OVER_BURDEN USE OF CHEMICAL FERTILIZER IN VEGETABLE FIELD[J].Earth Science-Journal of China University of Geosciences,1999,24(1):101-104. |
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| Authors: | Dong Yuean Shen Zhaoli Zhong Zuoshen |
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| Abstract: | For the study of the influence of nitrogen pollution on groundwater due to over_burden use of chemical fertilizer in vegetable field, the simulation experiment on two soil columns is done. The conclusion is that 72.08% and 47.44% of the total amount of chemical fertilizer go out from the columns. The experiment process can be divided into three stages according to the experiment data. First, the NH + 4 coming from the chemical fertilizer is adsorbed by the soil of columns, while K ++Na +, Ca 2+ and Mg 2+ of the soil are exchanged and go into seepage water; Second, the nitrification is strong. The increment of the NO - 3 mass concentration of seepage water is much larger than that of injected water; Third, the intensity of the nitrification becomes weak. The increment of the NO - 3 mass concentration of seepage water is smaller than that of injected water. |
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| Keywords: | nitrogen pollution chemical fertilizer simulation experiment on soil column |
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