论文部分内容阅读
土壤含盐量对作物的生长有较大影响,分析土壤盐分动态变化对防止土壤次生盐渍化和提高农作物产量有较大意义。对塔里木盆地南缘克里雅河流域于田地区典型盐渍化地进行4次野外调研,在GPS定点,土壤采样及室内分析的基础上,借助Excel,SPSS等统计软件对研究区不同时期土壤含量盐及pH进行比较。结果表明:土壤平均pH值为9.1,属于碱土,盐分含量表聚强烈,土壤可溶性盐及pH的变化趋势为9月>5月>7月>3月。土壤阳离子主要以Na+,K+,Ca2+和Mg2+为主。3月、5月、7月中各阴离子在土体中的含量依次为Cl->CO32->SO42->HCO3-,在易溶性盐类上行过程中,以氯化盐最为活跃,硫酸盐次之,碳酸盐较稳定。而9月各阴离子在土体中的含量依次为HCO3->CO32->Cl->SO42-。0-20 cm土层中盐离子相关性分析表明:3月、5月、7月、9月各离子之间及各离子与总可溶性盐之间的相关性不同。
Soil salt content has a significant impact on crop growth. Analyzing the dynamic changes of soil salinity has great significance in preventing secondary salinization of soil and increasing crop yield. In the southern margin of the Tarim Basin Keliya Yutian Yu typical salinization field investigation, GPS fixed point, soil sampling and indoor analysis, based on Excel, SPSS and other statistical software on the study area at different periods of soil Salt content and pH were compared. The results showed that the average pH value of soil was 9.1, which belonged to alkaline earth. The content of salt content was intensive, the change trend of soil soluble salt and pH was September> May> July> March. Soil cations are mainly Na +, K +, Ca2 + and Mg2 +. In March, May and July, the contents of anions in soils were Cl-> CO32-> SO42-> HCO3-. In the upward course of soluble salts, chloride was the most active and sulfate The carbonate is more stable. In September, the contents of anions in soil were HCO3-> CO32-> Cl-> SO42-. The correlation analysis of salt ions in 0-20 cm soil layer showed that the correlation between ions and total soluble salts was different in March, May, July and September.