绿化植物废弃物与不同调理剂混合堆肥的效果研究

Effects of different amendments on composting of greenery waste

为研究绿化植物废弃物与不同调理剂混合堆肥的效果,设置空白对照(处理1)、添加尿素(处理2)、添加尿素和菌剂(处理3)、添加尿素、菌剂和烟气脱硫石膏(处理4)4个处理,进行为期197 d的堆肥试验。结果表明:尿素和菌剂对堆体的pH和EC值影响不大,烟气脱硫石膏能调节堆体的pH并提高堆体EC值;堆肥结束时,处理1的有机质分解效果不明显,处理2—处理4的有机质分解率依次为4.7%、5.8%、14.8%;4个处理的总养分在整个堆肥期间均呈上升趋势,堆肥结束时4个处理的总养分含量依次为4.07%、4.85%、5.31%和6.06%,均符合有机肥或有机基质相关质量要求;4个处理的终点C/N依次为22、17、16和12。添加尿素、菌剂、烟气脱硫石膏均能促进有机物质的分解,加速堆体腐熟,提高堆肥产品的质量,以处理4的堆肥效果最好。

To study the effect of different amendments on composting of greenery waste,treatment 1（green-ery waste only）,treatment 2（greenery waste add urea）,treatment 3（greenery waste add urea and bacterial rea-gent）,treatment 4（greenery waste add urea,bacterial reagent and flue gas desulfurization gypsum）were carried out for 197 days.The results showed that,adding flue gas desulfurization gypsum could adjust pH and improve e-lectrical conductivity（EC）value,however,urea and bacterial reagent had no effect on pH and EC.During com-posting,the content of organic matter in treatment 1 did not change obviously,the decomposition rate of organic matter of treatment 2,3,4 was 4.7%,5.8%,14.8% respectively;The total nutrient increased in the whole composting period.when the experiment was finished,the content of total nutrient was 4.07%,4.85%,5.31%and 6.06%,final C-N in 4 treatments was 22,17,16 and 12 respectively.Therefore,above 3 individual amend-ments such as urea,bacterial reagent,flue gas desulfurization gypsum could promote the decomposition of organic matter,accelerate the composting maturity and improve the compost quality.Moreover the composting of treatment 4 had the most positive effect in 4 treatments.