摘要
[目的]研究植烟土壤pH分布特征与主要养分的关系.[方法]采集大理市43套植烟土壤样品进行检测.[结果]大理市植烟土壤pH平均为6.52,适宜烤烟生产的土壤样品占样品总数的72.09％.在4种植烟土壤类型中,pH的高低顺序依次为新积土＞水稻土＞紫色土＞红壤.在1 780～2 200 m海拔范围,土壤pH表现出逐渐降低的趋势.土壤有机质含量整体处于较丰富的水平,能够满足优质烤烟生产;土壤碱解氮、速效磷、交换性钙和交换性镁的平均含量均处于中等及偏丰富的水平,但分别有6.98％、11.63％、2.33％和4.65％的土壤养分还处于偏低水平;土壤速效钾含量偏低的土壤比例达58.14％.[结论]土壤pH与交换性钙、交换性镁含量呈极显著相关,与其他土壤养分含量无显著相关性.
[Objective] The research aimed to study soil pH distribution and its correlation with soil nutrients in tobacco-growing area.[Method] Soil nutrients of 43 samples from tobacco-growing area in Dali City were analyzed.[Result] Soil pH was generally suitable for tobacco cultivation,with average pH of 6.52.The average of pH of different soil types was fluvo-aquie soil ＞ paddy soil ＞ purple soil ＞ red soil.Soil pH decreased as altitude increased between 1 780 m and 2 200 m.The average contents of soil organic matter were relatively abundant and generally suitable for tobacco cultivation.The average contents of alkalytic nitrogen,available phosphorus,exchangeable calcium and exchangeable magnesium were generally medium and abundant level,however,their ration under medium level were 1 6.98％,11.63％,2.33％ and 4.65％,respectively.Moreover,58.18％ of soil available potassium contents were lower,which need to be supplied moderately for tobacco cultivation.[Conclusion] The correlation between soil pH and exchangeable calcium,exchangeable magnesium were significant.
出处
《安徽农业科学》
CAS
2014年第35期12474-12475,12488,共3页
Journal of Anhui Agricultural Sciences
基金
大理州科技计划项目"大理州植烟土壤分析与评价"
关键词
烟区
土壤
PH值
主要养分
相关分析
Tobacco-growing area
Soil
Main nutrients
Correlation analysis
