不同改良剂对滨海盐渍土盐碱指标及作物产量的影响研究

针对江苏滨海盐渍土的特点，采用5种土壤改良剂，通过田间试验分析了不同处理土壤盐碱指标的变化状况，并结合作物产量筛选出适宜的改良剂。结果表明：禾康、康地宝、腐殖酸处理后，土壤盐分含量、pH、总碱度和钠吸附比（(SAR）)较对照都有所降低，其中腐殖酸处理降低量最多，各指标分别为0.53 g/kg、0.16、0.170 cmol/kg和2.61；石膏处理后，土壤盐分含量增加0.16 g/kg，但pH、总碱度和钠吸附比与对照相比分别降低0.08、0.09 cmol/kg、3.33；金满田生物菌剂处理后土壤盐分、pH、总碱度和钠吸附比与对照相比差异不明显。改良剂处理后作物产量都有所提高，其中腐殖酸处理较对照增加最多，油菜和玉米分别增产15.68% 和9.15%。

Effects of Different Amendments on Salt Index of Coastal Saline Soil and Crop Yield

According to the characteristics of coastal saline soil in Jiangsu Province, the changes of soil salt index were analyzed under the field experiments with five soil amendments. The best amendment to the coastal soil in study area was selected according to crop output. The results showed that soil salt content, pH, total alkalify and sodium adsorption ratio (SAR) decreased under the treatments of Hekang, Kangdibao and humic acid compared with CK, especially under the treatment of humic acid, the amounts decreased by 0.53 g/kg, 0.16, 0.170 cmol/kg and 2.61, respectively. Under the treatment of gypsum, soil salt content increased by 0.16 g/kg. However, compared with CK, pH, total alkalify and sodium adsorption ratio decreased by 0.08, 0.09 cmol/kg and 3.33, respectively. There were no significant differences under the treatment of Jinmantian biological bacterium agent. The application of the amendments could increase crop yield compared with CK, especially when humic acid was used, the yields of rape and corn increased by 15.68% and 9.15% respectively.