不同改良物质对苏打盐碱土的改良效果

Improvement Effects of Different Conditioners on Soda Saline Soil

为了实现更好地开发利用苏打盐碱土,针对苏打盐碱土可溶性盐含量、pH、交换性钠含量高以及土壤结构松散等特点,以吉林省前郭县套浩太乡碱巴拉村北重度苏打盐碱土为研究对象,通过在实验室模拟田间泡田试验,向盐碱土中分别添加2种不同剂量的化学物质(改良剂)——硫酸铝和腐殖酸,与不加改良剂土壤(ck)的理化性状进行对比分析。结果表明:加入改良剂后土壤的理化性状和土壤结构发生了显著改善。经添加不同改良物质再次泡田后,随着改良剂用量的增加,土壤pH均逐渐降低,土壤<0.005 mm粒径的微团聚体数量明显减少,0.25~2.00 mm粒径间的团聚体数量均增加;随着改良剂用量的增加土壤水溶性钠逐渐溶脱,使得土壤中钠离子的含量均降低,土壤电导率逐渐升高。说明这2种化学物质对重度盐碱土改良均有一定的作用。

In order to develop and utilize soda saline soil better,we aimed at the study of the characteristics of high soluble salt content,high pH value,high exchangeable sodium content and loose soil structure in soda salinized soil.We selected the severe soda alkali soil in the north of Jianbala Village,Taohaotai Township,Qianguo County,Jilin Province in the Songnen southern plain as the experimental object.In laboratory simulated field experiment,two kinds of modified aluminum sulfate and humic acid were added to saline soil respectively,and the physical and chemical properties of the soil were compared with those of the soil without the improver.The results showed that the physical and chemical properties of the soil were improved significantly after the addition of the modifier.After adding different chemical modifiers to soak the field again,with the addition of different chemical amendments,the soil pH decreased gradually with the increase of chemical amendments;The number of micro aggregates smaller than 0.005 mm and the aggregate size of 0.25-2.00 mm particles increased significantly.With the increase of the dosage of the amendments,the water soluble sodium gradually dissolved,and the content of sodium ion in the soil decreased.The soil conductivity gradually increased due to the increase of the amount of the improved material.This indicates that the two chemicals have a certain effect on severe saline alkali soil.