| 稻田层间流活性磷素的动态变化 |
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| 引用本文： | 张志剑,阮俊华,朱荫湄,沈建国.稻田层间流活性磷素的动态变化[J].环境科学,2003,24(2):46-49. |
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| 作者姓名： | 张志剑 阮俊华 朱荫湄 沈建国 |
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| 作者单位： | 1. 浙江大学环境与资源学院,杭州,310029
2. 浙江杭州市余杭区农业科学研究所,杭州,311113 |
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| 基金项目： | 国家自然科学基金项目(49973031);浙江省科技计划项目(99-2-030) |
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| 摘 要： | 采用特氟纶管采样法,原位、动态、实时地研究了水田15～20cm层间流活性磷(钼酸盐反应磷,MRP)的流失浓度及潜能.研究表明,早稻生长期间水田层间流MRP浓度为0.110～0.273 mg/L,晚稻生长期的MRP浓度为0.085～0.285 mg/L;水田15～20cm层间流磷素浓度差异与施用磷肥造成的土壤含磷水平大小直接相关,且随着土壤磷素的提高其流失潜能随之增加;配施有机肥不影响水田层间流磷素的流失潜能.
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| 关 键 词： | 磷素 稻田层间流 流失浓度 流失潜能 动态变化 |
| 文章编号： | 0250-3301(2003)02-04-0046 |
| 收稿时间： | 2001/11/21 0:00:00 |
| 修稿时间： | 4/1/2002 12:00:00 AM |
Dynamics Characteristic of Phosphorus Loss Potential in Subsurface Runoff from Rice Field |
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| Zhang Zhijian,Ruan Junhu,Zhu Yinmei and Shen Jianguo.Dynamics Characteristic of Phosphorus Loss Potential in Subsurface Runoff from Rice Field[J].Chinese Journal of Environmental Science,2003,24(2):46-49. |
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| Authors: | Zhang Zhijian Ruan Junhu Zhu Yinmei and Shen Jianguo |
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| Institution: | College of Natural Resources and Environmental Science, Zhejiang University, Hangzhou 310029, China. |
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| Abstract: | A special rice field experiment was conducted to investigate the characteristic and mechanism of phosphorus (P) loss potential in subsurface runoff from rice field. Teflon Suction Cups (TSC) were inserted into tested plots in 15-20 cm in the rice field for water sampling dynamically. The range of molybdate reactive phosphorus (MRP) in sub-surface runoff were 0.110-0.273 mg/L, 0.085-0.285 mg/L during growth seasons of early rice and later rice, respectively. The magnitude of MRP concentrations in subsurface runoff in 15-20 cm from rice field was more consistent with trend of soil P accumulation (expressed as Olsen-P) due to P application. P concentration and its expected loss loading in the subsurface runoff in 15-20 cm in the rice field were not affected by P application combined with manure. |
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| Keywords: | phosphorus subsurface runoff of rice field loss concentration loss potential dynamic characteristic |
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