牛粪堆肥过程中有机态氮的动态变化

利用外源微生物进行牛粪高温好氧堆肥试验,研究堆肥过程中不同形态有机态氮组分的变化规律。结果表明,全氮与酸水解氮均呈下降趋势,与不加外源微生物处理相比,外源微生物处理只是加速全氮与酸水解氮含量的降低,并没有引起氮素过多的损失;氨基酸态氮呈现先降低后增加的趋势,堆肥结束时,外源微生物处理含量明显高于不加微生物处理;酰胺态氮与氨基糖态氮各处理含量都在升温期、高温期增加,然后随着堆肥温度的下降而降低,在腐熟期则呈现较平稳的走势。在堆肥的不同时期,外源微生物处理酰胺态氮含量明显低于不加微生物处理,而氨基糖态氮则相反。

Dynamic changes of organic nitrogen forms during the dairy manure composting

This paper dealt with changes of organic nitrogen forms during dairy manure composting with inoculating microbes.The results showed total nitrogen and acid hydrolyzing nitrogen obviously decreased during composting,and were lower in the treatment with microbe inoculation than in that without inoculation at different periods of composting,but there were no obvious differences at the end of composting.Amino acid nitrogen increased at the primary period,then decreased.At the end of composting,it increased significantly compared with that of the treatment without inoculation.Amide nitrogen and amino sugar nitrogen increased at the periods of temperature rising and high temperature,and decreased as temperature declined,then were constant at mature period.But at the different periods of composting,amide nitrogen and amino sugar nitrogen were obviously different among the different treatment.Amide nitrogen in the treatment with inoculation was obviously increased compared with of the treatment without inoculation,while the reverse was true for amino sugar nitrogen.