【摘要】 为了探究改良剂与沼液配施的合理方案，实现盐碱地改良，针对吉林省大安市盐碱地，通过大田试验，研究沼液与改良剂配施对苏打盐碱土的改良效果。试验结果表明，改良剂与沼液配施均能够有效提高土壤有机质、有效磷、速效钾、碱解氮的含量，增大总孔隙度，增加了土壤团聚体的数量，改善了土壤团聚体稳定性，水稻产量显著提升，并有效降低土壤pH值、土壤容重、碱化度、水溶性盐含量。综合分析，脱硫石膏与沼液配施对苏打盐碱土改良效果最好，对比未施用沼液的处理，有机质含量提升100%，有效磷含量提升34%，速效钾含量提升59%，碱解氮含量提升104%，总孔隙度提升14%，土壤团聚体数量显著增加，土壤团聚体稳定性得到明显改善，增产率为76.77%，土壤p H值降低12%，土壤容重降低9.9%，碱化度降低11%，水溶性盐含量降低48%。更多还原

【Abstract】 In order to explore the reasonable scheme of combined application of modifier and biogas slurry and realize the improvement of saline-alkali land,this experiment aimed at saline-alkali land in Da’an City,Jilin Province,and studied the improvement effect of combined application of biogas slurry and modifier on soda saline-alkali soil through field experiment. The results showed that the combined application of amendments and biogas slurry effectively increased the content of soil organic matter,available phosphorus,available potassium and alkali-hydrolyzable nitrogen,increased the total porosity and the number of soil aggregates,improved the stability of soil aggregates,significantly increased the rice yield,and effectively reduced soil pH,soil bulk density,alkalinity and water-soluble salt content.Comprehensive analysis showed that the combined application of desulfurized gypsum and biogas slurry had the best effect on the improvement of soda saline-alkali soil. Compared with the treatment without biogas slurry,the content of organic matter was increased by 100%,the content of available phosphorus was increased by 34%,the content of available potassium was increased by 59%,the content of alkalihydrolyzable nitrogen was increased by 104%,the total porosity was increased by 14%,the number of soil aggregates was increased significantly,and the stability of soil aggregates was significantly improved;The yield increase rate was 76.77%,the soil pH was decreased by 12%,the soil bulk density was decreased by 9.9%,the alkalinity was decreased by 11%,and the water-soluble salt content was decreased by 48%.更多还原