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1979～1985在山东陵县实验区设置田间试验,观测不同处理对改良盐碱土的效果.结果表明,施用不同数量和种类的有机肥后,土壤有机质自0.52～0.58%增加到0.75～1.26%,不施肥休闲地增加甚微;表土盐分自0.62～0.68%下降到0.09～0.18%,土壤有机质含量与全盐量之间呈显著负相关(r=-0.6~* n=36),作物产量与有机质之间呈显著正相关(r=0.74~* n=25).施用有机肥促进土壤中离子的运移,运移量为Na~+>Mg~(2+)>Ca~(2+),CI~->SO_4~(2-)>HCO_3~-,对照处理随着脱盐而HCO_3~-出现增加的趋势.有机、无机肥结合,既促进脱盐又利于提高生产,一般经3～4年,盐分可降到0.1%左右,土壤有机质达到1%左右,小麦、玉米单产提高20～25%
Field experiment was set up in Lingxian Experimental Area of Shandong Province from 1979 to 1985 to observe the effect of different treatments on the improved saline-alkali soil.The results showed that after applying different amounts and types of organic fertilizers, the soil organic matter increased from 0.52 ~ 0.58% to 0.75 ~ 1.26% The soil salt content decreased from 0.62 ~ 0.68% to 0.09 ~ 0.18%. There was a significant negative correlation between soil organic matter content and total salt content (r = -0.6 ~ * n = 36) (R = 0.74 ~ * n = 25). The application of organic manure promoted the migration of ions in the soil with the amount of Na ~ +> Mg ~ (2 +)> Ca ~ (2+) , CI ~ -> SO_4 ~ (2 -)> HCO_3 ~ -, the control treatment with the desalination and HCO_3 ~ - increasing trend of organic and inorganic fertilizer, both to promote desalination and help to improve production, usually after 3 to 4 years , Salt can be reduced to about 0.1%, soil organic matter reached about 1%, wheat, corn yield increased 20 ~ 25%