| 旱田养分淋溶规律及对地下水影响的研究 |
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| 引用本文： | 任丽萍,宋玉芳,许华夏,巩宗强,姚德明.旱田养分淋溶规律及对地下水影响的研究[J].农业环境科学学报,2001,20(3):133-136. |
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| 作者姓名： | 任丽萍 宋玉芳 许华夏 巩宗强 姚德明 |
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| 作者单位： | 中国科学院沈阳应用生态研究所 |
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| 基金项目： | 中国科学院“九五”特别支持项目 KZ95T－ 04－ 01，中国科学院沈阳生态试验站资助 |
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| 摘 要： | 通过农田 1 m深土层的模拟渗滤实验，对旱田养分淋溶规律和产生的环境影响——氮、磷、钾对地下水的潜在污染，进行了以黑麦草为供试作物，农用化肥氮、磷、钾为供试肥料的养分淋溶试验研究。结果表明，在旱田土壤中，氮肥的淋溶与施肥量呈显著正相关，主要以－ N形式产生淋溶，－ N的淋失率是施肥量 240 kg· hm－ 2的 15.85％，淋溶含量大于 20 mg· L－ 1，超过 WHO颁布的饮用水质量标准 10 mg· L－ 1，对地下水造成严重污染；磷肥的淋溶主要在土壤中以固定作用为主，其淋溶与对照无明显差异，对地下水无污染影响；钾肥的淋溶取决于施肥量，当施肥量在 120 kg· hm－ 2时，钾的最大淋溶含量为 14.30 mg· L－ 1，超过欧洲经济共同体颁布的饮用水质量标准 12 mg· L－ 1，对地下水有潜在污染影响。
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| 关 键 词： | 旱田 施肥量 养分淋溶 地下水 影响 |
| 文章编号： | 1000－ 0267(2001)03－ 0133－ 04 |
| 修稿时间： | 2000年8月19日 |
Eluviation of Nutrients in
Glebe |
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| REN Li-Ping,SONG Yu-fang,XU Hua-xia,GONG Zong-qiang,YAO De-ming.Eluviation of Nutrients in
Glebe[J].Journal of Agro-Environment Science( J. Agro-Environ. Sci.),2001,20(3):133-136. |
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| Authors: | REN Li-Ping SONG Yu-fang XU Hua-xia GONG Zong-qiang YAO De-ming |
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| Abstract: | A simulative leaching experiment was carried out with black straw and N, P, K fertilizers as test materials using one－ meter soil layer to evaluate eluviation of the various nutrients in glebe－ farmland and its environmental impacts, mainly, on potential contamination of groundwater. The results showed that eluviation of nitrogen was positive correlation with applied amounts of fertilizers and － N was the major form of eluviation of nitrogen. The leaching rate of － N was composed of 15.85％ of fertilizing amount, resulting in pollution of 20mg· L－ 1 in groundwater, which was higher than the standard of 10mg· L－ 1 for drinking water quality issued by WHO. Immobilization was major form of eluviation of phosphorus in the soil, which was negligible different from control and causing little contamination on groundwater. It has also been found that the eluviation of potassium was 14.3mg· L－ 1, which exceeded the standard of 12mg· L－ 1 for drinking water quality issued by EEC and had a potential environmental impact on groundwater when the soil receiving potassium of 120kg· hm－ 2. |
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