东北3个典型黑土区土壤无机硫的形态分布  

Speciation distribution of soil inorganic sulfur in three black soil areas of Northeast China

作　　者：迟凤琴[1] 汪景宽[2] 张玉龙[2] 魏丹[1] 周宝库[1] 匡恩俊[1] 

机构地区：[1]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,哈尔滨150086 [2]沈阳农业大学,沈阳110161

出　　处：《中国生态农业学报》2011年第3期511-515,共5页Chinese Journal of Eco-Agriculture

基　　金：国家重点基础研究发展计划(973计划)项目(G1999011810);国家科技支撑计划项目(2006BAD05B05)资助

摘　　要：采用田间取样、室内分步浸提的方法,系统研究了我国东北3个典型黑土地区土壤无机硫的含量分布和形态特征。结果表明:耕层(0～20 cm)黑土中无机硫含量占全硫的百分比为22%,其中水溶性硫占6%,吸附性硫占3%,盐酸可溶性硫占13%。水溶性硫和吸附性硫含量表现为海伦>北安>公主岭,盐酸可溶性硫含量为公主岭>海伦>北安。水溶性硫、吸附性硫含量随剖面的加深变化不大,盐酸可溶性硫在115 cm深度以下有一个积累的过程。土壤水溶性硫、吸附性硫与土壤有机质含量、阳离子交换量和<0.002 mm黏粒含量呈显著或极显著正相关,与pH呈显著和极显著负相关;盐酸可溶性硫含量和土壤电导率之间呈显著正相关。海伦地区黑土无机硫总量和盐酸可溶性硫含量随开垦年限增加明显下降,呈显著负相关。Using field sampling and step-extraction method,this paper analyzed the distribution and fraction characteristics of soil inorganic sulfur in three black soil zones in Northeast China.The results showed that inorganic sulfur in the top 0～20 cm black soil accounted for 22% of total sulfur.Then of the total inorganic sulfur,H2O-S accounted for 6%,adsorbed-S for 3% and HCl-S accounted 13%.The order of H2O-S and adsorbed-S content in the black soil zones was Hailun Bei＇an Gongzhuling.That of HCl-S was Gongzhuling Hailun Bei＇an.Soil H2O-S and adsorbed-S changed little with increasing soil profile depth.Below 115 cm soil depth,HCl-S began to accumulate.Soil H2O-S and adsorbed-S exhibited significant positive correlations with organic matter,CEC（cation exchange capacity） and content of clay smaller than 0.002 mm.Soil H2O-S and adsorbed-S correlated with pH negatively.A significant positive correlation was noted between soil HCl-S and soil electrical conductivity.Total inorganic sulfur and HCl-S contents decreased with increasing period of land cultivation in Hailun black soil zones.

关 键 词：黑土 无机硫 水溶性硫 吸附性硫 盐酸可溶性硫 土壤性质 开垦年限 

分 类 号：S158.3[农业科学—土壤学]