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通过吸附-解析试验和淋溶试验,研究了石灰和聚丙烯酰胺(PAM)对植烟酸性土壤钾、磷的吸附、解析和迁移的影响.结果表明:石灰和石灰+PAM处理能增加植烟酸性土壤对磷、钾的吸附量,其中以0.45%石灰+0.1%PAM处理的土壤吸附量最高,但当PAM用量增加时,吸附量下降;加入适量石灰和PAM后土壤对磷吸附强度降低,解析率升高;对钾而言,单纯加入石灰后吸附强度降低,解析率升高,而加入石灰+PAM后吸附强度又加大,但随PAM用量增高,吸附强度下降,解析率也出现先降低后升高的趋势.在植烟酸性土壤中施加0.45%石灰+0.1%PAM能有效缓解磷、钾向土层下迁移的趋势.
The effects of lime and polyacrylamide (PAM) on the adsorption, analysis and migration of potassium and phosphorus in acid rain-soil were studied by means of adsorption-desorption test and leaching test. The results showed that lime + lime + The adsorption capacity of phosphorus and potassium to acid soil was the highest, while the adsorption capacity of soil with 0.45% lime + 0.1% PAM was the highest, but decreased with the increase of PAM dosage. The analytical rate increased; for potassium, the adsorption strength decreased after pure addition of lime, the resolution increased, while the addition of lime + PAM adsorption strength and increased, but with the increase in the amount of PAM, the adsorption strength decreased, the resolution also appeared Lower and then increased.The application of 0.45% lime + 0.1% PAM in planting nicotine acid soil can effectively alleviate the tendency of phosphorus and potassium to migrate into the soil layer.