安康烟区不同海拔及土壤类型养分的分布特征

Nutrient Distribution Characteristics of Different Soil Types with Different Elevation in Ankang Tobacco Cultivation Area

为探明安康烟区植烟土壤的养分分布状况,分析了安康烟区不同海拔高度及不同类型植烟土壤的有机质、碱解氮、有效磷、速效钾和微量元素含量。结果表明：不同海拔高度有机质和有效磷含量均以海拔600～700m的植烟土壤最高,差异显著;碱解氮含量也以海拔600～700m植烟土壤含量较高,差异不显著;海拔500～700m植烟土壤的速效钾含量显著较高,氯含量无显著差异,有效硼和有效铜含量变幅较大但无显著差异;有效锰含量以海拔700～800m含量较高,与海拔600m以下土壤存在显著差异,但与其他海拔土壤无显著差异;有效铁含量以海拔600～700m含量较高,500～600m含量较低,差异显著;有效锌含量变幅较大,以海拔600～800m含量最高,差异显著。不同类型土壤中,有机质及碱解氮含量以料姜黄土最高;有效磷和速效钾以白墡土含量最高;氯和有效硼以白墡土含量最高,料姜黄土含量最低;有效铁以黄泥土含量最高,料姜黄土含量最低;有效铜和有效锌以扁沙土含量最高;有效锰含量黄泥土最高,料姜黄土、扁沙土和白墡土含量基本相当。

The content of organic matter,available nitrogen,available phosphorus,rapid available potassium and micronutrients of different tobacco-planting soils with different elevation in Ankang tobacco area was analyzed to study nutrients distribution of different tobacco-planting soils.Organic matter and available phosphorus content of tobacco-planting soil with an elevation of 600～700 mis maximum,significantly higher than tobacco-planting soils with other different elevations.Available nitrogen content of tobacco-planting soil with an elevation of 600～700 mis higher but no significant difference among tobacco-planting soils with different elevations.Rapid available potassium content of tobacco-planting soil with an elevation of 500～700 mis significantly higher than tobacco-planting soils with other different elevations but there are no significant differences in content of chlorine,effective boron and effective copper.Available Mn content of tobacco-planting soil with an elevation of 700～800 mis significantly higher than tobacco-planting soil with below an elevation of 600 mbut no significant difference with other different elevations.Available Fe content of tobacco-planting soils with an elevation of 600～700 mis significantly higher than tobacco-planting soils with an elevation of 500～600m.Available Zn content of tobacco-planting soil with an elevation of 600～800 mis significantly higher than tobacco-planting soils with other different elevations.Organic matter and available nitrogen content of Liaojiang loess is maximum but available phosphorus and potassium content of Baishan soil is maximum.Chlorine and available B content of Baishan soil is the highest.Available Fe content of yellow soil is the highest.Chlorine,available B and available Fe content of Liaojiang loess is the lowest.Available Cu and Zn content of sandy soil is the highest while available content of yellow soil is the highest.There is no difference in available Mn content among Liaojiang loess,sandy soil and Baishan soil.