摘要
以三江平原 3种主要沼泽类型———小叶章 (Calamagrostisangustifolia)沼泽、乌拉苔草 (Carexmeyeriana)沼泽、毛果苔草 (Carexlasiocarpa)沼泽以及不同开垦年限的耕地为研究对象 ,对其土壤中总硫含量进行分析 .3种沼泽中总硫量的顺序为小叶章沼泽 ( 6 2 2 .4mg·kg-1) <乌拉苔草沼泽 ( 82 0 .5mg·kg-1)、毛果苔草沼泽 ( 10 2 2 .4mg·kg-1) .挠力河、鸭绿河、别拉洪河及浓江流域土壤中总硫量的顺序为挠力河 ( 92 5 .0mg·kg-1) >鸭绿河 ( 84 1.8mg·kg-1) >浓江 ( 6 36 .5mg·kg-1) >别拉洪河 ( 5 2 0 .8mg·kg-1) .沼泽湿地及耕地土壤总硫量在层次上具有明显的规律性 ,即由表土层向下 ,含量逐渐降低 .1980～ 2 0 0 0年开垦的耕地土壤中总硫含量平均值为 180 .5mg·kg-1,而未开垦湿地中的总硫含量平均值为 735 .8mg·kg-1.耕地中的总硫量显著低于湿地中的总硫量 ,并且开垦年限越长 ,土壤中的总硫量越低 。
Three primary marsh types including Calamagrostis angustifolia marsh, Carex lasiocarpa marsh and Carex meyeriana marsh and the arables land reclaimed in different years were selected as studying objects,and the total sulfur in these soils were analyzed. The results indicated that the mean total sulfur was 622.4 mg·kg -1 in Calamagrostis angustifolia marsh soils,820.5 mg·kg -1 in Carex meyerianan marsh soils, and 1 022.4 mg·kg -1 in Carex lasiocarpa marsh soils.Naoli River, Bielahong River, Yalu River and Nongjiang River are the four typical rivers in Sanjiang Plain. The mean total sulfur was 925 mg·kg -1 in Naoli Valley soils ,708.6 mg·kg -1 in Bielahong Valley soils,841.8 mg·kg -1 in Yalu Valley,and 636.5 mg·kg -1 in Nongjiang Valley.The total sulfur in both marshes and arable soils presented distinct regularity, namely it gradually decreased from surface soil to botteom.The average total sulfur in the arable land reclaimed between 1980 and 2000 was 180.5 mg·kg -1 ,and it was 735.8 mg·kg -1 in natural marsh soils.So the total sulfur in arable land was remarkably lower than that in the marshes,and the reclamation could result in sulfur loss.
出处
《应用生态学报》
CAS
CSCD
2003年第12期2191-2194,共4页
Chinese Journal of Applied Ecology
基金
国家自然科学基金项目 (4 0 0 710 72 )
中国科学院湿地创新资助项目(KZCX2 3 0 2 )
关键词
三江平原
湿地
土壤
总硫
Sanjiang Plain, Wetland, Soil,Total sulfur
