河西盐渍化草地盐分组成及PH与有机质关系的通径分析  

PATH ANALYSIS ON THE RELATIONSHIP OF SOIL SALT CONSTITUTION AND PH WITH ORGANIC MATTER ON SALINE GRASSLAND IN HEXI CORRIDOR

作　　者：阎顺国 田贵仓 朱兴运[1] 柴来智 

机构地区：[1]甘肃草原生态研究所,兰州730020 [2]甘肃张掖地区草原站

出　　处：《草业科学》1992年第1期31-34,共4页Pratacultural Science

基　　金：本研究受国家自然科学基金资助。

摘　　要：对河西走廊盐渍化草地土壤盐分组成及 pH 与有机质的关系进行了通径分析。结果表明,土壤8种盐分离子及 pH 对有机质均有明显影响,其直接影响依次为:SO_4~=(+)>Na^+(-)>ca^(++)(-)>Cl^-(+)>Mg^(++)(-)>HCO_3^-(+)>pH(-)>K^+(-)>CO_3~=(-);总效应为;SO_4~=(-)>Ca^(++)(-)>HCO_3^-(+)>pH(-)>Na^+(-)>Mg^(++)(-)>Cl^-(-)>K^+(-)>CO_3~=(+)。盐分离子间及盐分离子与 pH 及有机质间均存在着明显的相互作用,其机理尚待进一步研究。The path analysis was carried out on the relationship between salt irons and pH with organic matter on the soil of saline grassland in Hexi Corridor.The results showed that 8 of salt irons and pH of soil had signif- icant direct and indirect effects on soil organic matter,the direct effects were SO_4=(+)>Na^+(—)>Cl^-(+)>Mg^(++)(—)>HCO_3^-(+)>pH(—)K^+(—)>CO_3=(—).The sum effects were SO_4~=(—)>Ca^(++)(—)>HCO_3^-(+)>pH(—)>Na^+(—)>Mg^(++)(—)> Cl^-(—)>K^+(—)>CO_3~=(+).The significant interactions were presented among salt irons,PH and organic matter,its mechanism will be studied in successive study.

关 键 词：盐分 土壤 有机质 通径分析 草地 

分 类 号：S812.2[农业科学—草业科学]