方正县土壤硒的分布特征及其与土壤性质的关系  

Distribution Characteristics of Selenium in Fangzheng County and Its Relationship with Soil Properties

作　　者：徐强[1,2] 迟凤琴[1,2] 匡恩俊[2] 张久明[2] 王伟[2] 郭喜忠[3] 马晓明[3] 

机构地区：[1]东北农业大学,黑龙江哈尔滨150086 [2]黑龙江省农业科学院土壤肥料与环境资源研究所黑龙江省土壤环境与植物营养重点实验室,黑龙江哈尔滨150086 [3]方正县农业技术推广中心,黑龙江方正1508001

出　　处：《土壤通报》2015年第3期597-602,共6页Chinese Journal of Soil Science

基　　金：公益性行业(农业)科研专项经费(201303106)资助

摘　　要：方正县是黑龙江省水稻主产区,为研究方正县土壤全硒(Se)的含量、分布特征及其与土壤性质的关系,在哈尔滨市所属方正县境内采集127个0~20 cm耕层土壤样品,分析了方正县土壤全硒含量及其影响因素。结果表明,方正县土壤全硒含量变幅为0.030~0.496 mg kg-1,算术平均值为0.228 mg kg-1略低于全国土壤平均硒含量,总体上处于中等、边缘及缺乏水平。在不同类型土壤中,泥炭土硒含量相对较高(0.267 mg kg-1)而沼泽土硒含量相对较低(0.153 mg kg-1)。不同成土母质中,以坡积物为母质发育的土壤硒含量较高(0.276 mg kg-1)而以冲洪积物为母质发育的土壤硒含量较低(0.207 mg kg-1)。在土地利用方面,稻田土壤全硒含量略高于旱地土壤。相关分析表明:土壤有机碳(SOC)与土壤粒径分布(PSD)是影响研究区表土层土壤硒含量的主要因素。Fangzheng County is a main production area of rice in Heilongjiang Province, which also serves as the producing counties of the enriched-Selenium(Se) rice. To evaluate the total Se level and distribution, investigate its relationship with soil properties, 127 soil samples were collected from the surface layer(0 ~ 20 cm) in the study area(Fangzheng County) with the determination of their total Se contents. The results showed that the total Se content ranged from 0.030 to 0.496 mg kg-1with arithmetic mean of 0.228 mg kg-1, which was lower than the national average.On the whole, the selenium level of agricultural soils belonged to medium, marginal or deficient. Among soil types,peat soil had a relatively high Se content(0.267 mg kg-1), while bog soil had a relatively low Se content(0.153 mg kg-1). Among soil parent materials, the highest content were recorded in slope sediments with an average Se content by0.276 mg kg-1, while Alluvial-pluvial material was the lowest with an average by 0.207 mg kg-1. In terms of land use,paddy soils had a higher Se content than upland soils. Correlation and regression analysis showed that soil total organic carbon(SOC) and soil particle size distribution(PSD) were the main factors, which affected soil selenium content.

关 键 词：方正县 土壤全硒 有机碳(SOC) 粒径分布(PSD) 

分 类 号：S153.6[农业科学—土壤学]