Abstract: [Objective] In this study, drip irrigation wheat farmland soil for 1 years, 3 years and 5 years was taken as the research object to analyze spatial and temporal distribution of nutrient transport in different positions of drip irrigation belt.[Method]Based on the collection of soil profile samples, combined with continuous monitoring and statistical analysis, the temporal and spatial variations of soil nutrient accumulation were studied.[Result]The soil nutrients in different soil layers of different drip irrigation years showed moderate intensity variation.Some of the alkali hydrolyzable nitrogen and available phosphorus showed weak variability.Coefficient varied between 7.68;-45.6;.In the vertical direction, the content of available nutrients in the soil, except for available potassium, the alkali hydrolyzable nitrogen and available phosphorus decreased gradually from the surface to the bottom.In the horizontal direction, soil alkali hydrolyzable nitrogen and available potassium showed obvious variation in different drip irrigation years, and most of the differences were significant, and most of the nutrient contents presented a trend of increasing first and then decreasing with the increase of the distance from the drip irrigation belt.[Conclusion]The spatial heterogeneity of soil nutrients in winter wheat under drip irrigation can provide a theoretical basis for rational fertilization and crop growth.

摘要： [目的]研究以滴灌年限为1、3和5年的滴灌小麦农田土壤为研究对象,分析距滴灌带不同位置的养分运移微时空空间分布.[方法]通过对土壤剖面样品的采集,结合连续性定位监测及地统计分析,研究不同滴灌年限土壤养分积累时空变异规律.[结果]在不同滴灌年限各土层土壤养分大部分呈现出中等强度的变异,部分碱解氮及速效磷养分呈现出弱变异性,变异系数在7.68;~45.6;.在垂直方向上,土壤速效养分含量除了速效钾外,碱解氮和速效磷都呈现出从表层到底层逐渐降低的规律.在水平方向上,土壤碱解氮及速效钾在不同滴灌年限中均呈现出较明显的变异规律,且大部分差异性显著,其养分含量大部分随距滴灌带距离的增加而呈现出先升高后降低的趋势.[结论]滴灌冬小麦土壤速效养分在不同滴灌年限中,呈现垂直方向上逐渐降低和水平方向上先升高后降低趋势(速效磷除外)的空间异质性规律,能够为合理施肥和作物的生长提供基础的理论依据.