黄土区村级土壤养分分布特征及评价

选取黄土高原地区的陕西省扶风县新集村为研究对象,GPS结合网格法,采集并分析了全村土样362个。结果显示,该村土壤普遍缺氮,其次缺钾,磷有零星缺乏,所有土样缺Fe,一半左右缺Zn,因此认为N、K、Fe、Zn应作为该村养分管理的主要目标元素。在GIS技术支持下,绘制了试验村土壤有效N、K、Fe、Zn的分布图。土壤养分综合系统评价法评价结果表明,土壤有效N以极低水平含量分布占绝对多数,有效K以中等和高水平含量分布为主,有效Fe以低水平含量分布为主,有效Zn的分布在村南以中水平含量为主,村北以低水平为主。

Distribution Characteristic and Evaluation of Soil Nutrient in the Loess Plateau at Village-scale

Total 364 top-layer(0-20cm) soil samples were taken in with GPS and grid,and analyzed in Xinjivillage of Shaanxi Province for available nutrients.Results indicated that soil N was widely deficient in the study area,and K was deficient secondly,P was deficient individually,Fe was deficient in all soil samples,and Zn was deficient about in half soil samples on the basis of assessment standard of SAI.So we think N,K,Fe,Zn should take as the object to manage in this village.The soil available N,K,Fe,Zn map were made with GIS and evaluated by ASI.It showed the content of available N was the lowest in most soil samples,available K,middling and high mostly,available Fe,low mostly,available Zn,middling mostly in village south and low mostly in village north.