洗盐方式对设施土壤盐分、养分含量及蔬菜生长的影响
Chinese Agricultural Science Bulletin(2023)
Abstract
为了解洗盐方式对降低土壤盐分和促进蔬菜生长的影响,在大棚栽培条件下比较研究了揭膜淋洗和灌水淋洗2种洗盐方式对设施土壤盐分分布、养分、pH及蔬菜生长和产量的影响.结果表明:无论是揭膜淋洗还是灌水淋洗均可促进设施土壤表层盐分向下部土层迁移,降低表层和亚表层土壤盐分,促进小白菜种子发芽出苗和根系生长,增加小白菜产量.2种洗盐方式对表层土壤盐分的下降量均在50%以上,小白菜出苗数提高200%以上,蔬菜产量提高65%以上.其中揭膜淋洗的洗盐效果好于灌溉洗盐.试验结果还表明,淋盐措施有助于提高土壤pH,但也导致了耕层土壤养分的下降.
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