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采用盆栽试验方法,共设计5个脱硫石膏水平(0、15、30、45、60 t/hm2),通过种植玉米进行脱硫石膏改良碱化土壤的施用量试验,研究玉米在不同脱硫石膏水平条件下的株高、根长、株径、单株根鲜重、土壤理化性质的变化规律。结果表明:施用脱硫石膏改良碱化土壤可以有效降低土壤的pH值和促进玉米的生长;综合土壤pH值、全盐量以及玉米的生长指标,初步得出脱硫石膏施用量30 t/hm2对重度碱化土壤的改良效果最好,最有利于玉米的生长发育。
A total of 5 desulfurized gypsum (0, 15, 30, 45, 60 t / hm2) were designed and pot experiments were conducted to test the application of desulfurized gypsum to improve alkalized soils by planting maize. Under the plant height, root length, diameter, root weight per plant, changes in soil physical and chemical properties. The results showed that application of desulfurized gypsum to improve alkalized soils can effectively reduce the soil pH and promote the growth of maize. According to the comprehensive soil pH value, total salt content and corn growth index, it was initially concluded that the application rate of gypsum 30 t / hm2 to heavy Alkaline soil, the best improvement, the most conducive to the growth and development of corn.