【摘要】 为揭示土壤盐分的剖面分布特征,于2017年采集河南省洛阳市4个烟叶主产县20个样点的土壤剖面共计100个土壤样品,测定了土壤全盐量（质量分数）、离子组成和pH,并分析了其分布特征。结果表明:研究区土壤多为非盐渍化,但在个别土层出现轻度盐渍化,且盐分阳离子以Ca²⁺为主、K⁺次之,阴离子以SO₄^2-为主,pH在7.50～8.03之间。全盐量与Ca²⁺、Mg²⁺、Na⁺、SO₄^2-和Cl^-含量呈极显著正相关。红黏土0～100 cm土层为非盐渍化,土壤盐分表现出较明显的表聚现象;黄土质褐土0～60 cm土层为非盐渍化,60～100 cm土层为轻度盐渍化,土壤盐分表现出明显的表聚和底聚现象。更多还原

【Abstract】 To investigate the profile distribution characteristics of soil salinity,100 soil samples were collected from 20 soil profiles in 4 main tobacco-producing counties in Luoyang City,Henan Province in2017. The total salt content,ion composition and pH of the samples were measured,and their distribution characteristics were analyzed. The results showed that most samples were non-salinized soils,however slight salinization occurred in several soil layers. Ca²⁺ was the main cation,followed by K⁺;SO₄^2-was the main anion. Soil pH ranged from 7.50 to 8.03. The total salt content significantly positively correlated to the contents of Ca²⁺,Mg²⁺,Na⁺,SO₄^2-and Cl^-. The 0-100 cm top layer of red clay soil was non-salinized soil,and the salt accumulated in soil surface. The yellow-cinnamon soil was non-salinized and slight salinized in0-60 and 60-100 cm layers,respectively. Salt notably accumulated in the surface and bottom of soil.更多还原