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通过设置未添加、添加5%、10%和15%沸石4个处理,试验研究了不同沸石添加量对猪粪、米糠堆肥的保氮效果.结果表明:添加沸石可以降低堆体的pH和水溶性NH4+-N含量,减少NH3的挥发损失;与对照处理相比,添加5%、10%、15%沸石处理可将N损失率分别降低12.33%、35.53%、47.32%;但沸石的添加量达到15%时,其堆体保持高温(≥55℃)的时间及平均堆温均较对照处理低,不利于堆肥的顺利进行,而添加5%、10%沸石处理的堆温较为合理.综合以上各项指标,研究认为沸石的适宜添加量为10%左右.
The results showed that adding zeolite can reduce the pH and water solubility of the pile body by setting four treatments of adding 5%, 10% and 15% zeolite without adding the zeolite The content of NH4 + -N decreased and the loss of NH3 decreased. Compared with the control, the N loss rate decreased by 12.33%, 35.53% and 47.32%, respectively, when treated with 5%, 10% and 15% When the temperature reached 15%, the temperature and the average reactor temperature of the pile kept at a high temperature (≥55 ℃) were lower than those of the control treatment, which was not conducive to the smooth progress of compost, while the reactor temperature of 5% and 10% zeolite was more reasonable. The above indicators, research that the appropriate amount of zeolite to add about 10%.