为了解连续施用脱硫石膏改良苏打盐化土的持续效应及环境效应,以经过3 a大田连续施用不同量脱硫石膏(0,15,22.5,30 t/hm2)改良的重度苏打盐化土为供试土壤,采用盆栽试验方法,研究2 a盆栽试验后,脱硫石膏的持续效应对饲草玉米生长、土壤环境以及农作物中重金属累积的影响。结果表明:15 t/hm2用量的脱硫石膏可以显著提高饲草玉米的出苗率、株高、茎粗和生物量,较对照分别提高20.6%,16.8%,8.1%和10.1%,试验范围内改良效果最佳。脱硫石膏使土壤的pH、EC降低,Na+减少,Ca2 ...
唐, 黄高鉴
doaj
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