| 滇池流域土壤氮磷分布特征及关键影响因素研究 |
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| 引用本文： | 胡 斌,和树庄,陈春瑜,吕文龙,雷冬梅.滇池流域土壤氮磷分布特征及关键影响因素研究[J].土壤学报,2012,49(6):1178-1184. |
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| 作者姓名： | 胡 斌 和树庄 陈春瑜 吕文龙 雷冬梅 |
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| 作者单位： | 云南大学生命科学学院,云南大学生命科学学院,云南大学生命科学学院,云南大学生命科学学院,云南大学生命科学学院 |
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| 基金项目： | 国家科技重大专项“水体污染控制与治理”(2009ZX07102-004)资助 |
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| 摘 要： | 从流域的尺度对滇池流域非点源污染土壤氮、磷的空间分布进行了研究。结果显示，滇池流域土壤有机质的空间分布为：西山＞斗南＞松花坝＞马金铺＞宝象河＞晋城新街＞东大河＞上蒜。土壤全氮空间分布特点为：斗南＞西山＞马金铺＞晋城新街＞东大河＞上蒜＞松花坝＞宝象河。其中斗南片区土壤氮的含量最高(0.221?0.091%)，宝象河片区最低（0.132?0.048%）。土壤全磷空间分布为：上蒜＞马金铺＞斗南＞晋城＞西山＞东大河＞松花坝＞宝象河。其中上蒜片区最高（0.221?0.195%），宝象河片区最低（0.08?0.024%），滇池东岸和东南区为高磷素区。研究认为，长期的大棚种植模式和湖滨坝平地区过度的土地利用及大量化肥投入增加了滇池流域非点污染物氮、磷的积累，这些区域中的土壤高氮、磷积累将成为滇池非点源污染来源的高潜力区，应引起重视。
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| 关 键 词： | 滇池流域 土地利用 土壤 氮 磷 分布特征 |
| 收稿时间： | 2011/10/31 0:00:00 |
| 修稿时间： | 5/19/2012 8:09:56 PM |
Distributions of soil nitrogen and phosphorus in Dianchi watershed and their key influencing factors |
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| hubin.Distributions of soil nitrogen and phosphorus in Dianchi watershed and their key influencing factors[J].Acta Pedologica Sinica,2012,49(6):1178-1184. |
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| Authors: | hubin |
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| Institution: | Yunnan University |
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| Abstract: | Abstract In order to understand distribution characteristics of soil nitrogen and phosphorus in the Dianchi watershed at the watershed scale, soil pH, total nitrogen (TN), total phosphorus (TP), and soil organic matter were analyzed of 130 surface soil samples collected from lands different in land-use type in the Dianchi Basin. Results show that the soils in the major farming regions including Dounan, Majingpu and Jincheng in the basin east to Lake Dianchi and some of Xishan, were higher in total N, and those in Songhuaba in the north, Baoxiang River area in the northeast, and the mountains in the south of the watershed were lower. The highest and the lowest TN content was found in Dounan (2.21 g kg-1) and Baoxiang River area (1.32 g kg-1), respectively. And the soils in Shangsuan in the south and Majingpu, Dounan and Jincheng in the east of the watershed were the highest in total P, and followed by those in Xishan are Dongda River area, and those in Songhuaba in the north and Baoxiang River area in the northeast the lowest. The highest and lowest content of TP was found in Shangsuan (2.21 g kg-1) and Baoxiang River area (0.80 g kg-1), respectively. The findings suggest that in the greenhouse farming dominated regions, lakeside plains and flat tablelands, the application of large volumes of chemical fertilizers has led to high accumulation of N and P in the soil, thus making these areas highly potential non-point source agricultural pollution sources. It is, therefore, necessary to intensify control and management of non-point source pollution in those areas. |
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| Keywords: | Dianchi watershed Land-use type Soil N P Distribution characteristics |
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