盐渍化地区土地整理过程中的土壤改良

针对盐渍化地区土地整理实践中土壤盐分含量高,养分含量少的特点,考虑隔盐材料(A)、隔盐层深度(B)和改良剂(C)三个因素,设计3因素3水平正交方案,对土壤进行改良试验,以便筛选出较好的改良方案。研究结果表明,经过改良后土壤容重、pH值和含盐量下降明显,有效氮、有效磷、有机质的含量均呈上升趋势,有效钾含量略有下降;与对照组相比,土壤理化性质、主要养分含量明显改善,作物生物量和产量显著提高,且各指标均差异显著。经过综合平衡,确定A2B2C1为最佳改良方案,其中隔盐材料选取炉渣和玉米秸秆,隔盐层深度为60cm,改良剂为有机肥。

Soil Improvement in Land Consolidation in Salinization Area

According to the consolidation practice and the special characteristics of land in the saline area with high soil salt content and less nutrient content, this article selected salt separating material(A), the depth of the salt separating layer(B) and ameliorants(C) as factors to design a 3 factors by 3 level orthogonal variance experiment. The results showed that after soil improvement, the soil bulk density, pH value and salt content decreased significantly, and the content of available nitrogen, phosphorus and organic matter increased but a slight decline in available potassium. Compared with the control group, the soil properties, main nutrients, crop biomass and yield of the test groups were significantly improved, and the indicators were significantly different. The best improvement program is A₂B₂C₁, in which the slag and straw are selected as the salt separating material, and the depth of the salt separation is 60 cm and organic fertilizer can be used as ameliorants.