改良剂与沼液配施对中度苏打盐碱土的改良效果研究

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%。

Study on improvement effects of combined application of amendment and biogas slurry on moderate soda saline-alkali soil

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’anCity，JilinProvince，and studied the improvement effect of combined application of biogas slurry and modifier on soda saline-alkali soil through fieldexperiment. The results showed that the combined application of amendments and biogas slurry effectively increased the content of soil organicmatter，available phosphorus，available potassium and alkali -hydrolyzablenitrogen，increased the total porosity and the number ofsoil aggregates，improved the stability ofsoil aggregates，significantly increased thericeyield，and effectively reduced soilpH，soil bulkdensity，alkalinity and water-soluble saltcontent.Comprehensive analysis showed that the combined application of desulfurized gypsum and biogas slurry had the best effect on the improvement of soda saline-alkalisoil. Compared with the treatment without biogasslurry，the content of organic matter was increasedby100%，the content of available phosphorus wasincreased by34%，the content of available potassium wasincreased by59%，the content of alkali -hydrolyzable nitrogen wasincreased by104%，the total porosity wasincreased by14%，the number of soil aggregates wasincreased significantly，and the stability of soil aggregates wassignificantlyimproved；The yield increase rate was76.77%， the soil pH wasdecreased by12%，the soil bulk density wasdecreased by9.9%，the alkalinity wasdecreased by11%，and the water-soluble salt content was decreased by 48%.