碱性土壤如何改良
碱性土壤如何改良?北方土壤多呈碱性,不适宜种养南方花木,如杜鹃、茶花、兰花等,由于长期适应南方酸性、高铁、高铝及低盐的土壤环境,一旦种植在北方偏碱性的土壤中,常常会生长不良甚至死亡。因此使北方碱性土壤酸化,就成为栽培好这些喜酸性花木的关键。
碱性土壤常用的改良方法有以下几种:
施用硫酸亚铁:露地花卉可每10平方米施硫酸亚铁1.5千克,施后可降低0.5单位的pH值;对于粘重土壤,用量可增加1/3。
施用食醋液:施用的醋必须是食用米醋,对于pH值大于7的盆土,可用150~2004音食醋液浇灌,每15~20天一次。
施用硫磺:此法很适于地栽植物,特点是降低pH值较慢,但效果持续时间长。
掺用针叶土:掺施针叶土是改良碱性土壤的最根本方法。针叶土是由腐烂的松柏针叶、残枝等枯落物及锯末等沤制而成的,酸性强。一般碱土掺1/5或1/6的针叶土,即适合喜酸性花卉盆栽使用,以上就是关于碱性土壤如何改良的介绍。
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