复合菌剂对二氯喹啉酸胁迫下烟草根际土壤微生物及酶活性的影响

摘要

为改善稻烟轮作地区的土壤生态环境，将复合菌剂加入受二氯喹啉酸污染的土壤中，研究其对烟草根际土壤微生物数量、微生物量C、微生物量N及蔗糖酶和脲酶活性的影响。结果表明加入复合菌剂后，烟草根际土壤的细菌、真菌、放线菌数量及微生物量C和微生物量N较健康土和受害土均明显增多，土壤的蔗糖酶及脲酶活性明显高于受害土而低于健康土。表明复合菌剂对受二氯喹啉酸污染过的土壤有一定的修复作用。%Compound microbial agents were applied to quinclorac contaminated soil in tobacco-paddy rotating areas to improve soil ecological environment.. Effects of these agents on rhizosphere soil microbe, microbial biomass C, microbial biomass N, invertase and urease activities were investigated. Results showed that the amounts of tobacco rhizosphere soil microbe (bacteria, fungi, actinomyces), soil microbial biomass C and N in treated soil were increased significantly compared with that in both healthy and contaminated soils. Invertase and urease activities of treated soil were higher than that of contaminated soil but less than that of healthy soil. Compound microbial agents are beneficial in repairing quinclorac-contaminated soils.