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硫磺和硫酸亚铁对鸡粪好氧堆肥的保氮效果

Keywords: 鸡粪,好氧堆肥,硫磺,硫酸亚铁,保氮效果,堆肥反应器

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Abstract:

利用堆肥反应器控制堆肥条件,研究外源添加剂硫磺和硫酸亚铁在鸡粪好氧堆肥中的保氮效果。结果表明:与无添加剂的对照(CK)比较,堆肥中添加硫磺(T1)对堆肥升温和高温期的维持有一定影响,添加硫酸亚铁(T2)对堆肥升温和高温期的维持均无显著影响,而同时添加硫磺和硫酸亚铁(T3)更有利于高温期的持续,加速有机物的降解。添加硫磺和硫酸亚铁均能降低堆肥pH,增加堆肥中铵态氮和总氮含量,至堆肥25d后T1、T2和T3处理的铵态氮含量分别比CK提高157.60%、86.64%和238.08%,总氮分别比CK处理增加2.75%、9.04%和15.82%。添加硫磺和硫酸亚铁增加了堆肥EC值,至堆肥25d后所有处理的萝卜种子发芽指数GI均大于50%。结果表明硫磺和硫酸亚铁可作为畜禽粪高温堆肥良好的保氮剂,以同时添加硫磺和硫酸亚铁的保氮效果较好。

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