脱硫石膏对苏打盐碱土旱田的改良效果研究

Study the effect of the use of FGD gypsum into the alkalization soil to improve soil property

以吉林省西部苏打盐碱土旱田为供试土壤,以玉米为供试作物,通过盆栽试验,研究了脱硫石膏对供试土壤的改良效果和作物生长的影响。结果表明:脱硫石膏可有效降低苏打盐碱土的pH和促进玉米的生长。当脱硫石膏施用量为3t/667m2时,成熟期玉米的株高、根长、植株鲜重等各项生长指标达到最好,但与脱硫石膏施用量为2t/667m2时没有显著差别,结合土壤pH值、全盐量等因素,得出脱硫石膏施用量为2t/667m2时,对吉林西部苏打盐碱土旱田改良效果最好。

Through this pot experiment of corns,the paper studied the effect of the use of FGD gypsum into the alkalization soil to improve corn output and soil property in the alkalization soil of the west of Jilin Province.The study indicated that FGD gypsum reduced effectively the PH value of the alkalization soil and improved the corn output.When the amount of FGD gypsum was 45t/hm2,the growth index of planting corn,such as the plant height,root length,plant fresh weight,was the best.But when the amount of FGD gypsum was 30t/hm2,the difference was not obvious.The results indicated that considering the factors of soil PH value and stalt-resistance,when the amount of FGD gypsum was 30t/hm2,the effect of the use of FGD gypsum of the alkalization soil in the west of Jilin Province to improve soil property was the best.