【摘要】 选用市售金霉素作为试验材料,采用室内培养的方法,研究了金霉素在土壤中的残留特点及其对土壤酶活性的影响。结果表明:金霉素在土壤中随着培养时间的延长呈现出逐渐降解的特点:低浓度处理的金霉素(100 mg/kg)在培养的前10 d已大部分分解,到第30天时已经检测不到;高浓度处理的金霉素(200、300 mg/kg)在培养的前10 d迅速分解,50%以上。此后分解速度变缓。外源金霉素对土壤酸性磷酸酶、中性磷酸酶、转化酶、脲酶活性均起到抑制作用,并且随着金霉素浓度的增大抑制作用增强,对酸性磷酸酶、中性磷酸酶、脲酶活性的抑制作用主要表现在培养的前10 d;而对转化酶活性的抑制作用在整个培养阶段均有所体现。金霉素在土壤中呈现出逐渐降解的特点,对土壤酶活性起到抑制作用。更多还原

【Abstract】 The experiment chooses aureomycin sold in the market to be material.By culture experiment method,the experiment proves up residues characteristics of aureomycin in soil and effects of that on soil enzyme activities.Result: With the increasing culture time,aureomycin had a gradual degradation in soil:Low concentration aureomycin(100 mg/kg) had decomposed mostly in the first 10 days,there was no residues in the 30 days;While high concentration aureomycin(200 mg/kg and 300 mg/kg) decomposed rapidly in the first 10 days,which had decomposed more than 50%.Then decomposed lowly.Exogenous aureomycin restrains the activities of acid phosphatase,neutral phosphatase,invertase and urease in soil.Besides the effect enhanced with the increasing concentration of aureomycin,effects of that on acid phosphatase,neutral phosphatase,urease manifests in the first 10 days;While the function manifests on invertase in the whole stages.Exogenous aureomycin decomposed in the soil and restrains soil enzyme activity.更多还原