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达禹环境-环保百科 当前位置: 达禹环境 > 环保百科 > 土壤钝化剂对施用红泥膜沼气池沼渣的黑麦草中重金属积累的影响
土壤钝化剂对施用红泥膜沼气池沼渣的黑麦草中重金属积累的影响
时间 : 2019-07-24 浏览量 : 21

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少化肥和农药的用量。不同地区及原料产生的  红泥膜沼气池彩经网沼渣,重金属含量也有所区别,尤其是以畜禽粪便为  原料,由于畜禽对重金属吸收率较低,其大部分会通  过原样的形式随排泄物排出体外2。重金属具有  难迁移、难降解、易富集、危害大等特点,所以废弃物  中的重金属逐渐成为废弃物资源再利用的限制因  素3。因此,通过钝化剂原位修复技术来降低土壤中有效态重金属污染具有重要意义4。石灰类钝  化剂会提高土壤pH值,土壤有机质、粘土矿物、水


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黑麦草具有先锋植物特性,生长快、产量高,可多次刘割并再生,对重金属有很强的抗性和蓄集作用。同时,实现“猪沼士草”的良性循环,是农区发展资源节约型、生态友好型畜牧业的有效途径,通过种草养畜,吸纳养猪场产生的沼液,既有利于保护生态环境,又有利于解决南方饲料不足的问题。施用红泥膜沼气池沼渣作为土壤改良剂,可以减少化肥的施用,促进植物生长,减少土壤退化和板结,提高土  壤水分保持能力0。本试验通过将红泥膜沼气池沼渣和土壤钝化剂  起施用于黑麦草,研究不同土壤钝化剂和施用量对  黑麦草中重金属含量的影响,为替代化肥又减少农作  物中重金属积累的红泥膜沼气池沼渣安全施用模式提供参考。


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