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采用室内模拟培养试验,研究了畜禽粪便中尿囊素在土壤中含量的动态变化规律。结果表明,畜禽粪便所含尿囊素在土壤中降解快速,但不同种类和用量处理的变化速度和幅度不同。180 d时,鸡粪和猪粪处理降解率可达95.59%、90.83%。降解率与用量呈负相关,与时间呈正相关,其与时间的关系可以用v=A+Blnt回归方程拟合。尿囊素在土壤中的降解受微生物和其他非生物学共同作用,微生物作用占主导地位,微生物降解量占减少总量的78%。畜禽粪便中的尿囊素随着时间的延长,依靠其自身分解和微生物等作用降解而逐渐减少,但在短期内可能产生环境危害。
Indoor simulated cultivation experiments were conducted to study the dynamic changes of allantoin in livestock and poultry manure. The results showed that the allantoin contained in livestock manure was rapidly degraded in soil, but the speed and range of change of different types and dosage were different. At 180 days, the degradation rates of chicken manure and pig manure reached 95.59% and 90.83% respectively. Degradation rate was negatively correlated with the dosage and positively correlated with time, and its relationship with time could be fitted by the regression equation of v = A + Blnt. Degradation of allantoin in soil is mediated by microorganisms and other non-biological organisms. Microbial action dominates and microbial degradation accounts for 78% of the total reduction. Allantoin in livestock and poultry excrement gradually decreases with degradation over time and by microorganisms, but may cause environmental damage in the short term.