宝鸡烟区植烟土壤主要养分现状

摘要

[目的]为研究宝鸡烟区烟田土壤养分状况.[方法]取样点207个覆盖了全市3个烟区(陇县、麟游县、凤县)的植烟土壤,对宝鸡主产烟县207个土壤样品主要养分进行分析.[结果]有机质含量平均为13.68 g/kg,总体上处于适宜水平；全氮、碱解氮、全磷、全钾和速效钾含量总体上处于适宜或较高水平；速效磷含量相对缺乏；土壤养分含量之间均在0.01水平显著正相关.对23个乡镇土壤养分含量进行聚类分析,可以分为4类.根据各类土壤养分含量的平均值和标准差,制定相应的施肥方案.[结论]针对土壤养分含量情况,提出一些改良措施.%[Objective] The research aimed to study soil nutrient contents in Baoji tobacco-planting area. [Method] A total of 207 tobacco-planting soil samples were collected from three tobacco-planting areas (Longxian, Linyou and Fengxian) in Baoji. And major nutrients in tobacco-planting counties were determined. [Result]The average organic matter content was 13. 68 g/kg, which was at an appropriate level as a whole. The total nitrogen, available nitrogen, total phosphorus, total potassium and available potassium content in the soil were generally at a suitable or higher level. The available phosphorus was relatively deficient. The soil nutrient content had extreme positively significane. 23 soil samples collected from tobacco-planting areas were analyzed with the method of cluster analysis. Comparing the mean and std. D of every cluster' s nutrients value to the critical of soil nutrients in tobacco-planting area, the suggestions of fertilization according to 4 clusters were given. [Conclusion] Some improving measures were presented according to the status of soil fertility.