Aiming at the serious problem of soil salinization in Ningxia irrigation district, a rice variety Jite 605 was used as material, four combinations of integrated technology(Ⅰ:applying desulfurized gypsum 22.5 t/ha;Ⅱ:applying desulfurized gypsum 22.5 t/ha and ameliorants 7.5 t/ha;Ⅲ:applying desulfurized gypsum 22.5 t/ha, ameliorants 7.5 t/ha and organic fertilizer 30 t/ha;Ⅳ:applying desulfurized gypsum 22.5 t/ha, ameliorants 7.5 t/ha, organic fertilizer 30 t/ha and yellow sand 30 t/ha) were designed, and the treatment with no soil ameliorants was used as control.The effects of four integrated models on the EC and p H values of soil and paddy water, rice yield and its related traits were studied.The results showed that the soil EC and p H values of four integrated models were significantly lower than those of CK, and the yields of rice were significantly higher than that of CK.In the same year, the plant height, thousand-grain weight, grain weight per spike, grain weight per plant, number of filled grains per spike and number of total grains per spike of four integrated models were significantly higher than those of CK.Among them, the effects of modelⅢandⅣwere better.The rice yield was positively correlated with the plant height, spike length, number of tillers per plant, grain weight per plant and number of total grains per spike.The order of comprehensive evaluation value(Q value) for improvement effect wasⅣ＞Ⅲ＞Ⅱ＞Ⅰ＞CK, indicating that the modelⅣhad the best effect to improve saline-alkali soil, which could be used for the improvement and utilization of saline-alkali soil in Ningxia irrigation district.%针对宁夏回族自治区引黄灌区土壤盐碱化严重的问题,以水稻品种吉特605为材料,以不施任何改良物质的处理为对照(CK),研究了4种盐碱土改良技术集成模式(Ⅰ:施入脱硫石膏22.5t/hm2;Ⅱ:施入脱硫石膏22.5 t/hm2、改良剂7.5 t/hm2;Ⅲ:施入脱硫石膏22.5 t/hm2、改良剂7.5 t/hm2、有机肥30 t/hm2;Ⅳ:施入脱硫石膏22.5 t/hm2、改良剂7.5 t/hm2、有机肥30 t/hm2、黄沙30 t/hm2)对土壤、稻田水的EC、p H值和水稻产量及其相关性状的影响.结果表明,所有改良模式下土壤EC、p H值均极显著低于CK,水稻产量均极显著高于CK.相同年份所有改良模式水稻株高、千粒质量、穗粒质量、单株籽粒质量、穗实粒数、穗总粒数均极显著高于CK,其中以模式Ⅲ和Ⅳ的效果较好.水稻产量与株高、穗长、单株分蘖数、单株籽粒质量、穗总粒数均呈显著正相关.不同处理的改良效果综合评价Q值表现为Ⅳ＞Ⅲ＞Ⅱ＞Ⅰ＞CK,说明模式Ⅳ的改良效果最好,可用于宁夏回族自治区引黄灌区盐碱土的改良和利用.
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