氧化钙与混合肥配施对西辽河平原盐碱地土壤理化性质的影响

Effects of Combined Application of Caustic Oxide and Compound Fertilizers on Physical and Chemical Properties of Saline Alkali Soil in the West Liaohe Plain

为揭示氧化钙与有机无机混合肥配施对盐碱地改良效果,以通辽苏打盐碱土为材料,设置16个氧化钙与有机无机混合肥组合,在玉米成熟期取0-20 cm土层土壤样品,利用常规方法测定表层土壤pH值、阳离子交换量、交换性钠、土壤有机质、土壤速效养分、土壤8大离子含量指标,研究综合改良法对苏打盐碱土的改良效果.结果表明,150 kg·hm^(-2)CaO+2996 kg·hm^(-2)有机无机混合肥条件下土壤pH和碱化度改良效果最优,并且土壤有机质、碱解氮、速效磷和速效钾含量也有明显改善.

The effect of compound calcium oxide and organic inorganic fertilizer on the improvement of saline-alkali soil was investigated. Sixteen combinations of calcium oxide and organic inorganic mixed fertilizer were used with Tongliao soda Samples from the 0-20 cm soil layer were taken at the mature stage of corn. The surface soil p H,cationic exchange amount,exchange sodium,soil organic matter,soil available nutrients,and soil 8 ion content index were determined by conventional measurement methods. The improvement effect of the comprehensive modification method on soda saline-alkali soil was determined. Soil p H and alkalinity were most improved under 150 kg·hm^（-2）CaO ＋ 2996 kg·hm^（-2） organic and inorganic fertilizer conditions. Soil organic matter,alkalysis nitrogen,available phosphorus and available potassium content were also significantly improved.