黄土旱塬区长期施肥对土壤剖面养分分布的影响  

Effect of Long-term Fertilization on Nutrients Distribution of Soil Profiles in Arid Highland of Loess Plateau

作　　者：彭令发[1] 郝明德[1] 来璐[1] 李丽霞[1] 

机构地区：[1]西北农林科技大学水土保持研究所,陕西杨凌712100

出　　处：《水土保持通报》2003年第1期36-38,共3页Bulletin of Soil and Water Conservation

基　　金：中国科学院知识创新工程(KZCX2-413);国家攻关项目(2001BA808B18)

摘　　要：主要探讨了黄土塬区长期冬小麦连作施肥对土壤养分剖面分布的影响。结果表明,有机质、全氮和有效氮在土壤剖面中大致呈"S"型分布,而全磷在整个剖面呈抛物线型分布。不同处理耕层土壤养分差异较明显,耕层以下土壤养分变化与耕层基本趋势相一致。长期施肥对土壤60cm以上土层土壤养分影响较大,而对100cm以下土层土壤养分影响较小。单施化肥对土壤肥力影响不明显,有机肥与化肥配施对提高土壤肥力有较好的作用。The effect of longterm continuous fertilization to winter wheat field is mainly researched on the distribution of nutrients of soil profiles. The experiment results show that the profiles of organic matter, total nitrogen and available nitrogen are taken on the distribution of 'S' shape but total phosphorus is in the form of parabola in soil profiles. The nutrient difference of the layers below topsoil is biggest under different treatments, even though the nutrients difference of the layers below topsoil is on the decrease, but their change tendency is the same as that of topsoil. Longterm fertilization mainly affects soil nutrients above 60 cm soil layers, but affects soil nutrients a little below 100 cm soil profiles. Only applying chemical fertilization does not evidently affect soil fertility, and applying organic manure and chemical fertilization plays a special role on improving soil fertility. 

关 键 词：黄土旱塬区 长期施肥 土壤剖面 养分分布 

分 类 号：S147.2[农业科学—肥料学] S153.6[农业科学—农业基础科学]