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养殖场猪粪的不当处理会给环境造成严重污染,研究其降解变化,可以为养殖场粪便利用提供科学依据。采用恒温培养试验,研究在保育和育肥两个阶段时分别接种复合微生物菌剂(包括芽孢杆菌、酵母菌、乳酸菌、光合菌)对新鲜猪粪发酵中的有机质、全磷、全氮、硝态氮及铵态氮的影响。结果表明,复合菌剂处理与对照相比,提高了有机质的降解速度和TN、NH_4~+-N转化量。保育阶段,T2、T3处理TN下降了20.3%,NH_4~+-N下降了66.7%,T1处理TN和NH_4~+-N分别下降17.8%和55.7%,对照组分别下降了17.3%和50.7%。育肥阶段,接种菌剂的处理NH_4~+-N较培养初期下降了66.7%,对照为50.9%。试验末期,随着铵态氮降低,硝态氮有升高的趋势,大于5 g的复合菌剂添加量对猪粪降解效果不显著(P>0.05),保育期和育肥期猪粪中有机质、全磷、全氮和硝态氮及铵态氮变化趋势一致。研究表明,复合菌剂对猪粪的TN、NH_4~+-N降低作用明显,但是添加量超过一定范围影响不显著(P>0.05),试验末期的NO3--N增强效应,需要进一步研究。推算结果表明,复合菌剂处理的猪粪TN降低20.3%,肥料化利用,氮素循环利用趋于平衡。
Improper disposal of pig manure in farms will cause serious pollution to the environment and study its degradation and degradation, which can provide a scientific basis for farm manure utilization. The experiment of constant temperature culture was used to study the effect of compound microbial agent (including Bacillus, yeast, lactic acid bacteria and photosynthetic bacteria) on the organic matter, total phosphorus, total nitrogen and nitrate state of fresh pig manure during the two stages of conservation and fattening. Effect of nitrogen and ammonium nitrogen. The results showed that compared with the control, the composite strain increased the degradation rate of organic matter and the conversion of TN and NH 4 + -N. In the conservation stage, TN decreased by 20.3% and NH_4 ~ + -N decreased by 17.7% and 55.7% respectively in T2 and T3 treatments, and decreased by 17.3% and 50.7% . In the fattening stage, the NH_4 ~ + -N inoculation was 66.7% lower than that in the initial stage of culture, and the control was 50.9%. At the end of the experiment, with the reduction of ammonium nitrogen, the nitrate nitrogen had a tendency of increasing. The amount of compound bacteria agent above 5 g had no significant effect on pig manure degradation (P> 0.05). During the incubation period and fattening period, , Total phosphorus, total nitrogen, nitrate nitrogen and ammonium nitrogen showed the same trend. The results showed that the compound fungicides had a significant effect on the reduction of TN and NH_4 ~ + -N in pig manure, but no significant effect was found when the amount of TN and NH_4 ~ + -N was added in a certain range (P> 0.05). The enhancement effect of NO3 - N at the end of the experiment needs further study. The calculation results show that the pig manure TN treated with compound fungicides is reduced by 20.3%, and the utilization of manure and nitrogen recycling tend to balance.