脱硫石膏施用时期和深度对改良碱化土壤效果的影响

选择宁夏西大滩碱化土壤,以油葵为供试作物,采用两因素随机区组设计,进行脱硫石膏改良碱化土壤的田间试验研究.结果表明,脱硫石膏施用时期和施用深度不同,对改良土壤碱性和促进作物生长发育的效果不同.秋季施用较春季施用油葵出苗率提高38.0%,产量提高39.0%;深施(25 cm)脱硫石膏较浅施(10 cm)油葵出苗率提高6.3%,产量提高6.0%.秋季深施较秋季浅施、春季深施、春季浅施油葵出苗率分别提高12.0%、25.6%、21.5%,产量分别提高14.4%、32.7%、29.9%,表明秋季深施较秋季浅施、春季深施及春季浅施对促进油葵生长发育,提高产量效果更显著.

Impacts of the applied period and depth of desulfurized gypsum on improving the alkaline soil

A research on the period and depth of desulfurized gypsum being used in improving the alkalized soil is taken by applying desulfurized gypsum and planting oil sunflower on a piece of typical alkalized land in Xidatan of Ningxia.The experimental results show that applying desulfurized gypsum in different periods and depths has different effects on promoting the growth and yield of sunflower.If the desulfurized gypsum is applied in autumn other than in spring,the effect will be more distinct as the survival r...