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本文探讨了添加稻草和选择性抑制剂下红壤旱地和淹水稻田土壤细菌和真菌数量的动态变化。结果表明,培养期间,旱地土壤中添加稻草(Str)处理细菌和真菌数量比对照(CK)分别增加271.4%~518.8%和2900%~3608%;添加稻草+放线菌酮(Str+Ac)处理土壤细菌数量比Str处理增加34.1%~81.4%;添加稻草+四环素+链霉素(Str+Sm+Tc)处理土壤细菌数量比St r处理下降14.3%~43.5%,而真菌增加17.1%~37.6%。淹水稻田土壤中,St r处理土壤细菌数量比CK增加115.3%~362.2%,而真菌数量下降5.8%~27.8%;Str+Ac处理土壤细菌和真菌数量与Str处理基本相同;Str+Sm+Tc处理土壤细菌数量比Str处理下降39.0%~76.2%。旱地土壤中添加稻草使细菌与真菌(B/F)比率显著下降,而淹水稻田土壤中添加稻草使B/F比率明显升高。阐明旱土中添加稻草后细菌和真菌均参与其分解和转化,而真菌作用占主要,淹水稻田土壤中添加稻草的分解和转化主要为细菌。土壤水分对添加稻草土壤微生物群落变化有较大影响。
This article explores the dynamic changes of soil bacteria and fungi in dry and flooded red paddy soil with the addition of straw and selective inhibitors. The results showed that the amount of bacteria and fungi added with straw (Str) increased by 271.4% -518.8% and 2900% -3808%, respectively, compared with the control (CK) The number of bacteria in soil increased by 34.1% -81.4% compared with Str treatment. The amount of bacteria in soil treated with straw + tetracycline + streptomycin (Str + Sm + Tc) decreased by 14.3% ~ 43.5% and the fungi increased by 17.1% ~ 37.6%. In flooded paddy soil, the number of bacteria in St r soil increased by 115.3% -362.2% and the number of fungi decreased by 5.8% -27.8%; Str + Ac + The number of bacteria in Tc soil decreased by 39.0% ~ 76.2% compared with Str treatment. The ratio of bacteria to fungi (B / F) decreased remarkably when straw was added to dryland soils, while the ratio of B / F was significantly increased by adding straw in the flooded paddy soils. It is elucidated that the bacteria and fungi are involved in the decomposition and transformation after adding straw in dry land, while the fungi play a dominant role. The decomposition and transformation of the added straw in the flooded paddy soil are mainly bacteria. Soil moisture had a great influence on the microbial community changes after adding straw.