文献类型： 外文期刊

作者： Qin Hong-ling ¹ ; Quan Zhi ¹ ; Liu Xin-liang ¹ ; Li Ming-de ² ; Zong Yong ¹ ; Wu Jin-shui ¹ ; Wei Wen-xue ¹ ;

作者机构： 1.Chinese Acad Sci, Inst Subtrop Agr, Key Lab Agroecol Proc Subtrop Reg, Changsha 410125, Hunan, Peoples R China

2.Hunan Acad Agr Sci, Inst Soil & Fertilizer, Changsha 410125, Hunan, Peoples R China

关键词： vegetable soils;critical value;P leaching probability;risk assessment

期刊名称：AGRICULTURAL SCIENCES IN CHINA （ 影响因子：0.82； 五年影响因子：0.997 ）

ISSN： 1671-2927

年卷期： 2010 年 9 卷 11 期

页码：

收录情况： SCI

摘要： The aim of the study was to develop an index to assess the environmental risk of P loss potential in vegetable soils with chronic difference of plantation in the suburbs of Changsha, Hunan Province, China. Chemical methodology was used to study soil phosphorus status and the relationships between available P in soil and potential soil leaching P. The results showed that there was a significant linear relationship between Olsen P and CaCl(2)-P or P concentration in soil solution. Olsen P increased sharply when either CaCl(2)-P or P concentration in soil solution reached a certain level. It was confirmed that 80 mg kg(-1) of Olsen P was the critical value of soil P leaching in the vegetable soils. P leaching probability over the critical was assessed by GIS and indicator Kriging and four secondary risks of phosphorus leaching loss were defined. In the area with vegetable cropping for over 30 yr (Chenjiadu) and 10-15 planting years (Huangxingzhen), the indices of phosphorus leaching loss risk were 3 and 2.93, respectively. These two areas belonged to strong secondary of risk of phosphate leaching loss. In the new vegetable planting field less than 2 yr (Ningxiang), the index was 0.06, which had almost no risk of phosphorus leaching. In vegetable soils in the suburban region of Changsha, the phosphorus leaching peotential is high and the phosphorus leaching loss is related to chronic length of vegetable cropping.