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生态学杂志 ›› 2011, Vol. 30 ›› Issue (06): 1125-1130.

• 研究报告 • 上一篇    下一篇

不同畜禽粪便所含金霉素在土壤中的动态变化及降解途径

张健,关连珠**,颜丽   

  1. 沈阳农业大学农业土地与环境学院, 沈阳 110161
  • 出版日期:2011-06-08 发布日期:2011-06-08

Dynamics and degradation approach of different domestic animal feces chloroteracy-line in soil.

ZHANG Jian, GUAN Lian-zhu**, YAN Li   

  1. College of Natural Resources and Environment, Shenyang Agricultural University, Shenyang 110161, China
  • Online:2011-06-08 Published:2011-06-08

摘要: 采用室内模拟培养试验,研究了畜禽粪便中所含金霉素在土壤中含量的动态变化及消解途径。结果表明:畜禽粪便中金霉素在土壤中的降解呈“L”型,但不同粪肥种类和用量处理的变化速率和减少率有显著差异(P<0.05);180 d时,鸡粪处理土壤中金霉素减少率低于猪粪处理,低浓度鸡粪和猪粪处理土壤中金霉素减少率最大,可达85.4%和92.3%;减少率与畜禽粪便用量呈负相关,与时间呈正相关;畜禽粪便中的金霉素在土壤中的降解提高主要是外源微生物降解,占总减少量的75.7%,光降解和其他降解所占比例较小;随着培养时间的延长,微生物的降解作用增强,光解作用减弱。综上所述,随着时间的延长,畜禽粪便中的金霉素随自身分解和微生物等作用降解而逐渐减少,但短期内可能产生环境危害。

关键词: 水稻, 低P胁迫, 适应机理

Abstract: A simulated indoor incubation experiment was conducted to study the concentration dynamics and degradation approaches of different domestic animal feces chloroteracy-line (CTC) in soil. The degradation of the CTC in soil presented L-type curve, but the degradation rate and degradation percentage varied with feces kind and its dosage (P<0.05). On the 180th day of incubation, the CTC degradation percentage of chicken feces was lower than that of pig feces. In the treatments with low dosage chicken and pig feces, the degradation percentage was the highest, reached to 854% and 923%, respectively. The CTC degradation percentage was negatively correlated with the dosage of the feces, and positively correlated with incubation time. In the process of CTC degradation, exogenous microbes played most important role, accounting for 757%, while photo-degradation and chemo-degradation only accounted for a small portion. With the extension of incubation time, microbial and chemical degradation increased, while photo-degradation decreased. Our results suggested that the CTC concentration in domestic animal feces declined with self-decomposition and microbial degradation, etc., but could bring short-term environmental risk.

Key words: Oryza sativa, Low phosphorus stress, Adaptive mechanism