不同改良剂对苏打盐碱土的改良效果

Improvement Effect of Different Amendments on Soda Saline-alkali Soil

通过盆栽试验,研究了4种改良剂对苏打盐碱土理化性质的影响。结果表明:4种改良剂均能够有效提高土壤有机质、有效磷、速效钾、碱解氮的含量,并降低土壤pH、碱化度、水溶性盐含量及电导率。土壤中CO3^2-、HCO3^-、Ca^2+、Cl^-、Na^+含量降低,Mg^2+、K^+含量升高,SO4^2-含量无明显变化。综合分析结果表明,改良剂G3的效果较为显著。

The effects of four different amendments on the physicochemical properties of saline-alkali soil and the growth of maize seedlings were studied by pot experiments.The results showed that,after being treated with the four amendments,pH and water-soluble salt content of the soil were significantly reduced.In contrast,the contents of soil organic matter,available phosphorus,available potassium and alkali-hydrolyzable nitrogen increased.The contents of CO3^2-、HCO3^-、Ca^2+、Cl^-and Na^+in the soil decreased,and the contents of Mg^2+and K^+increased.The SO4^2-content changed little.After comprehensive analysis,the effect of G3 was the best.