普定县烟区不同类型土壤有机碳含量特征  

Characteristics of Organic Carbon Content in Diff erent Types of Soil in Puding Tobacco Area

作　　者：成侃 姜本昌 漆梦雪 Cheng Kan;Jiang Benchang;Qi Mengxue(Anshun Tobacco Company,Guizhou,561000;School of Resources and Environmental Engineering,Anshun University,Guizhou,561000)

机构地区：[1]安顺市烟草公司,贵州561000 [2]安顺学院资源与环境工程学院,贵州561000

出　　处：《当代化工研究》2024年第22期123-125,共3页Modern Chemical Research

摘　　要：为研究烟区土壤有机碳的含量特征及其分布,在普定县烟草种植区域内,选择代表性植烟土壤进行剖面各层次土壤样品采集,对土壤有机碳含量进行研究。以普定典型烟区黄壤、石灰土和黄棕壤3种典型土壤为研究对象,测定这3种土壤的理化因子和有机碳含量并计算有机碳储量。结果表明:普定烟区3种土壤pH值显著受到土壤类型和土壤深度的影响。土壤pH值由高到低依次为石灰土、黄壤和黄棕壤。石灰土的含水率显著低于黄壤和黄棕壤(P<0.05)。各土壤类型容重和含水率随着土壤深度的增加而减少,但黄壤的pH值表现为底层土高于表层土;普定烟区不同类型植烟土壤有机碳含量差异较大,其中黄棕壤的有机碳含量在3种植烟土壤中较高,达到25 g/kg;黄壤和石灰土的有机碳含量较低,分别为6.62 g/kg和5.35 g/kg;黄棕壤有机碳储量最高,为200.29 Mg C/hm^(2),黄壤为65.05 Mg C/hm^(2),石灰土最低,为36.46 Mg C/hm^(2),不同类型植烟土壤中有机碳储量存在显著差异性(P<0.05)。In order to study the content characteristics and distribution of soil organic carbon in tobacco-growing areas,representative tobacco-planting soils were selected in the tobacco planting area of Puding County to collect soil samples at each layer of the profile,and the content of soil organic carbon was studied.In this paper,three types of typical soils,namely yellow soil,lime soil and yellow-brown soil in Puding typical tobacco planting area,were used as research objects to determine the physicochemical factors and organic carbon contents of these three types of soils and calculate the organic carbon reserves.The results showed that:The pH of the three soils in Puding tobacco area was significantly affected by soil type and soil depth.Soil pH was in the order of lime soil,yellow soil and yellow-brown soil from high to low.The water content of lime soil was significantly lower than that of yellow and yellow-brown soil(P<0.05).The volumetric weight and water content of each soil type decreased with the increase of soil depth,but the pH of yellow soil showed that the subsoil was higher than the surface soil;The organic carbon content of different types of tobacco-planting soils in the Puding tobacco area varied greatly,with yellow-brown loam having a higher organic carbon content of 25 g/kg among the three tobacco-planting soils,and yellow loam and lime soil having lower organic carbon contents of 6.62 g/kg and 5.35 g/kg,respectively;Yellow-brown loam had the highest organic carbon storage of 200.29 Mg C/hm^(2),yellow loam 65.05 Mg C/hm^(2),and limestone soil was the lowest with 36.46 Mg C/hm^(2),and there was a significant difference(P<0.05)in the organic carbon stock in different types of tobacco-planting soils.

关 键 词：植烟土壤 有机碳 分布特征 土壤理化性状 

分 类 号：S572[农业科学—烟草工业]