Simulated Tests of Phosphorus Leaching from Organic-Conventional Vegetable Soils in Watershed of Fuxian Lake

XIA Tian-xiang; LI Wen-chao

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Simulated Tests of Phosphorus Leaching from Organic-Conventional Vegetable Soils in Watershed of Fuxian Lake

更新时间：2024-11-07

- Simulated Tests of Phosphorus Leaching from Organic-Conventional Vegetable Soils in Watershed of Fuxian Lake
- Vol. 21, Issue 3, Pages: 19-22(2007)
- 作者机构：
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  CLC： S153X820.3
- Published：2007
- 稿件说明：
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XIA Tian-xiang, LI Wen-chao. Simulated Tests of Phosphorus Leaching from Organic-Conventional Vegetable Soils in Watershed of Fuxian Lake[J]. 2007, 21(3): 19-22.
DOI：

XIA Tian-xiang, LI Wen-chao. Simulated Tests of Phosphorus Leaching from Organic-Conventional Vegetable Soils in Watershed of Fuxian Lake[J]. 2007, 21(3): 19-22. DOI：

摘要

利用3种不同高度的土柱

对有机-常规种植菜地土壤进行了磷素淋溶模拟研究

结果表明：有机种植菜地土壤磷素淋溶量远高于常规种植菜地土壤

不同高度土柱在模拟780 mm降雨量条件下

前者磷素淋溶平均水平是后者的26倍左右。灌溉不仅降低了不同土壤有效磷含量

而且使土壤磷素吸附解吸特征发生明显改变。此外

田间监测结果显示

有机种植对地下水磷素水平的提高明显大于常规种植。可见

有机种植中土壤磷素由淋溶进入地下水体相对于常规种植风险更大

有机种植业的发展必须采取必要措施

减缓土壤磷素淋溶流失。

Abstract

The simulated test was conducted by means of three kinds of soil column of 20cm

40cm and 60cm length. The results were as follows. The amounts of phosphorus leaching from organic vegetable soil were 26 times more than that from conventional vegetable soil in the different length column when 780mm rainfall was simulated. Irrigation not only reduced the soil available phosphorus content

but also changed the characteristics of phosphorus sorption and desorption of different soils. In addition

organic cultivation increased phosphorus content in the groundwater more obviously than conventional cultivation. It is suggested that the risk of soil phosphorus leaching to the groundwater body from organic cultivation could be greater than that from conventional cultivation and some managements should be adopted at the development of organic cultivation to prevent phosphorus leaching IOSS.

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