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采用根箱盆栽法,研究了甲磺隆对我国南方小麦根际与非根际土壤中三大类群微生物菌群结构的影响。结果表明:在2μg/g甲磺隆浓度胁迫下,普通细菌受到显著抑制(P<0.01),耐受细菌在前30天受影响显著,但随着甲磺隆的降解和根际效应的加强而逐渐减弱;真菌是甲磺隆污染土壤中的活跃菌群,处理根际与非根际土壤中耐受真菌与对照相比30天后即达到P<0.01的显著水平;放线菌是甲磺隆胁迫下的劣势菌。微生物三大类群对甲磺隆胁迫的响应依次为放线菌>细菌>真菌,真菌的此类特性为寻求甲磺隆高效降解菌及其快速降解机制提供了可能。
The root-box pot method was used to study the effects of metsulfuron-methyl on the microflora in three groups in rhizosphere soil and non-rhizosphere soil of southern China. The results showed that the common bacteria was significantly inhibited (P <0.01) at the concentration of 2μg / g metsulfuron, and the resistant bacteria was significantly affected by the first 30 days. However, with the degradation of metsulfuron and the enhancement of rhizosphere effect But gradually weakened. The fungi were active bacteria in the soil contaminated by metsulfuron-methyl. The tolerant fungi in rhizosphere and non-rhizosphere soil reached the significant level of P <0.01 after 30 days compared with the control. Under the threat of forced inferior bacteria. The response of three groups of microorganisms to metsulfuron-methyl stress was actinomycete> bacteria> fungi, and the fungal properties of these three groups provided the possibility of seeking high efficient degradative bacteria of metsulfuron-methyl and their rapid degradation mechanism.