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用鸡粪与锯末为原料进行高温好氧堆肥试验,研究物料C/N为15、25和40时对鸡粪锯末高温好氧堆肥过程中堆体温度、pH、碳素、氮素和碳氮比等主要指标的影响,以期探讨鸡粪锯末的不同配比对碳素和氮素转化的影响,为优化堆肥提供理论依据。结果表明:1)鸡粪与锯末在C/N=25时达到的温度最高为66℃,达到最高温度所需最短时间为3d,C/N=15的处理次之。2)堆肥过程中各处理的pH变化基本一致,都是先上升后下降的趋势。3)在堆肥结束时,各处理的全碳量均有所降低。T2和T3处理全氮含量呈不断升高的趋势,T1处理全氮含量呈先下降后上升的趋势。在堆肥结束时,T1处理全氮含量有所降低。T1、T2和T3处理的C/N在堆肥结束时都有所下降,其中T1表现为先升高后下降。4)堆肥结束时,各处理的NH4+-N含量分别比最高时降低了44.12%、74.37%和56.83%,NO3--N质量分数分别比开始时增加了855.72、731.68和532.23mg/kg。综合判断,物料碳氮比为25时有利于鸡粪锯末高温堆肥中碳素和氮素的转化。同时鸡粪中添加锯末对C/N=15的堆体温度起到一定的正面影响。
The experiments of high temperature aerobic composting with chicken manure and sawdust were carried out to study the effect of temperature, pH, carbon, nitrogen and carbon nitrogen on the composting process of high temperature aerobic composting of chicken manure with 15/25 and 40 / Than other major indicators of impact, in order to explore different ratios of chicken manure sawdust on carbon and nitrogen transformation, to provide a theoretical basis for the optimization of compost. The results showed that: 1) the highest temperature reached 66 ℃ when chicken manure and sawdust reached C / N = 25, the shortest time required to reach the maximum temperature was 3d, followed by C / N = 15. 2) During the composting process, the pH changes of all treatments are basically the same, all of them are the first to increase and then decrease. 3) At the end of compost, the total carbon content of all treatments decreased. The content of total nitrogen in T2 and T3 showed a rising trend. The content of total nitrogen in T1 decreased firstly and then increased. At the end of composting, total nitrogen content decreased with T1 treatment. The C / N of T1, T2 and T3 decreased at the end of composting, and T1 showed the first increase and then the decrease. 4) At the end of composting, the contents of NH4 + -N decreased by 44.12%, 74.37% and 56.83%, respectively, and the contents of NO3 - N increased by 855.72, 731.68 and 532.23 mg / kg, respectively. Comprehensive judgments, carbon and nitrogen material ratio of 25 is conducive to high temperature composting manure sawdust carbon and nitrogen transformation. At the same time sawdust added to chicken manure to C / N = 15 reactor temperature play a certain positive impact.