中文摘要：

利用RTK GPS定位技术对崩岗洪积扇的基本理化性质及洪积扇不同位点的养分分布情况进行研究。实验位于湖北通城县一处典型的崩岗洪积扇,研究发现碱解氮、速效钾质量比均随距离扇口距离的增加而有规律的增大,速效磷质量比随距离扇口距离的增加则表现出有增大的趋势,但局部规律性不明显。养分含量与主要影响因素的研究发现各主要养分含量均随取样高程、有机质质量比呈近线性分布,随粘粒质量分数的平方变化呈近线性变化,各主要养分在洪流作用下水平移动均很明显,但在洪流之后,碱解氮容易扩散而再分布,速效钾的再分布现象却不明显。

英文摘要：

Based on the RTK GPS positioning technology,the basic physical and chemical properties and nutrient distribution of the collapsing pluvial fan were studied. Experiments with a typical collapsing pluvial fan had been made in Tongcheng County,Hubei Province. It was found that the content of alkali hydrolyzable nitrogen and available potassium were risen regularly with the increase of distance from the fan starting point and available phosphorus was increased enormously,but no prominent partial regularity increase was discovered. The study of the relationship between the nutrient contents and the main factors revealed that the main nutrient contents showed a linear distribution with the sampling elevation and the organic matter contents and a linear change with the square of clay content. The studied nutrients all shared a distinctive movement in the horizontal direction with the flood and the diffusion, and redistribution of alkali hydrolyzable nitrogen following the flood was more obvious than that of available potassium.