无土栽培有哪些优点?
无土栽培的确切含义是无污染、无有机质、无菌、无粪尿和无土壤的栽培。与传统栽培方法相比,它有许多优点:
①无土栽培解决了土壤种植不易解决的水、空气和养分供应问题,不存在水分、养分供应失调,花卉对水分、养分需要能够得到满足,能够人为地创造花卉吸收水分、养分所需的条件。
②无土栽培所使用的营养液是根据花卉生长发育需要精心配制的,有利于花卉迅速生长,花多、花大、色艳、花期长、香气浓,下部叶子经久不落,产花周期短,单位面积产量高。
③用无土栽培种植花卉,其根系着生在通气良好的沙、蛭石等介质中,为根系的生长提供比土壤栽培更良好的条件,根系比较发达。
④清洁卫生,病虫少。无土栽培所用肥料是用无机元素配制的营养液,基质是经过消毒的,既清洁卫生无气味,最大限度地控制了环境污染,又可减少病虫害的发生。
⑤栽培简单,劳动强度小,能节约大量的劳力。无土栽培省去了施肥、浇水、除草、整地等重体力劳动,平时只需要定期补充营养液和水分,操作简单,效果好。如大规模生产自动化程度高,更显其优越性。
⑥无土栽培有固定的容器,肥、水损失很少,水耗是土栽的1/10,养分节省一半。
⑦无土栽培比较灵活,不受诸多限制,适合室内使用。一般场地只要有空气和水、光照、温度等条件就可采用。
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