土壤改良剂对黄河三角洲滨海盐碱土的改良效应

采用牛粪(A)、石膏(B)、秸秆(C)、保水剂(D)4种改良剂,通过4因素4水平正交设计方案,对黄河三角洲滨海盐碱土进行土壤改良试验,筛选出较好的改良方案,为黄河三角洲盐碱土的改良利用提供理论依据。研究结果表明:土壤pH和钠吸附比(SAR)随着改良时间增加呈下降趋势,土壤有机质、有效氮、有效磷、有效钾呈上升趋势;4种改良剂对盐碱土改良指标的贡献值存在差异,综合考虑最佳配方为A4B4C1D4,其土壤有机质、有效氮、有效磷、有效钾含量分别比对照增高113.93%,1 014.23%,828.32%,265.45%;其土壤pH和SAR比对照分别下降4.71%,33.37%。

Effect of Soil Ameliorants on Coastal Saline-alkali Soil in the Yellow River Delta

This research adopted the gypsum,straw,cow dung,water-retaining agent as ameliorants to improve the soil property of coastal saline-alkali soil in the Yellow River Delta by using four factors of four level orthogonal variance analysis.Base on it,the better drainage scheme can be chosen and it can provide theoretical basis for the improvement of the coastal saline-alkali soil in the Yellow River Delta were chosen.Results showed that: pH and sodium adsorption ratio of saline-alkali soil were declined with the improvement,but organic matter,nitrogen,phosphorus,potassium of saline-alkali soil were on the rise.The contribution values existed differences between different indicators to improve the quality of soil with four ameliorants.The best formula was A4B4C1D4 after comprehensive consideration,and its soil organic matter,effective nitrogen,effective phosphorus and available potassium increased 113.93%,1 014.23%,828.32% and 265.45% respectively,compared with control group.Soil pH and SAR decreased 4.71% and 33.37% respectively,compared with control group.