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