| 疏浚底泥土地投放中活性磷的下移规律 |
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| 引用本文： | 陈英旭,朱广伟,何云峰,田光明,陈华林,王凤平.疏浚底泥土地投放中活性磷的下移规律[J].土壤学报,2003,40(1):96-101. |
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| 作者姓名： | 陈英旭 朱广伟 何云峰 田光明 陈华林 王凤平 |
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| 作者单位： | 1. 浙江大学环境工程系,杭州,310029
2. 中国科学院南京地理与湖泊研究所博士后流动站 |
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| 摘 要： | 通过原状土柱淋洗试验研究了运河 (杭州段 )疏浚底泥土地投放后磷在土层中的分布规律。结果表明 ,在连续淋洗的条件下 ,疏浚底泥的土地投放并未显著提高淋洗液中活性磷的浓度 ;但在干湿交替的淋洗条件下疏浚底泥中活性磷的下移作用却相当明显。疏浚底泥土地投放后显著提高了表层1 5cm厚的土层中Olsen P含量 ,而 1 5cm以下土层中的Olsen P的增加并不明显 ,原因可能与疏浚底泥中有机酸的释放及土壤pH的剖面变化特征有关。干湿交替等环境因子的变化对底泥活性磷的下移程度产生更大的影响 ,且底泥用量越大 ,其潜在的影响可能越持久。
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| 关 键 词： | 底泥 土地投放 磷 土柱 淋洗 |
| 收稿时间： | 2001/2/19 0:00:00 |
| 修稿时间： | 2001/9/25 0:00:00 |
DOWNWARD MOVEMENT OF AVAILABLE PHOSPHORUS AFTER LAND APPLICATION OF DREDGED SEDIMENT |
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| Chen Ying-xu,Zhu Guang-wei,He Yun-feng,Tian Guang-ming,Chen Hua-lin and Wang Feng-ping.DOWNWARD MOVEMENT OF AVAILABLE PHOSPHORUS AFTER LAND APPLICATION OF DREDGED SEDIMENT[J].Acta Pedologica Sinica,2003,40(1):96-101. |
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| Authors: | Chen Ying-xu Zhu Guang-wei He Yun-feng Tian Guang-ming Chen Hua-lin and Wang Feng-ping |
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| Institution: | Department of Environmental Engineering, Zhejiang University, Hangzhou 310029, China;Department of Environmental Engineering, Zhejiang University, Hangzhou 310029, China;Department of Environmental Engineering, Zhejiang University, Hangzhou 310029, China;Department of Environmental Engineering, Zhejiang University, Hangzhou 310029, China;Department of Environmental Engineering, Zhejiang University, Hangzhou 310029, China;Department of Environmental Engineering, Zhejiang University, Hangzhou 310029, China |
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| Abstract: | Summary Effects of land application of dredged sediment from the Grand Canal (Hangzhou section) on the distribution of phosphorus in soil layers were studied by soil column leaching experiments. The results showed that application of dredged sediment did not significantly increase phosphorus concentration in the soil column leachate. Dry wet alternative treatment has strong effect on the release of available phosphorus from dredged sediment to subjacent soil layer. After application of dredged sediment, contents of Olsen P in the upper 15 cm soil layers were markedly higher than that of the control column, but in deeper soil layers, increasing in Olsen P was insignificant. The increase in Olsen P was partly due to release of organic acid from dredged sediment, which increased soil organic carbon content and decreased soil pH in the whole soil column. The more dredged sediment was applied,the longer effect on soil and ground water may last. |
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| Keywords: | Sediment Land application Phosphorus Soil column Leaching |
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