首页> 外文期刊>Bulletin of Environmental Contamination and Toxicology >Effect of Pre-emergence Herbicides on Microbial Biomass and Biochemical Processes in a Typic Fluvaquent Soil Amended with Farm Yard Manure
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Effect of Pre-emergence Herbicides on Microbial Biomass and Biochemical Processes in a Typic Fluvaquent Soil Amended with Farm Yard Manure

机译:出苗前除草剂对典型农家肥改良难处理土壤微生物生物量和生化过程的影响

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摘要

Application of thiobencarb, pendimethalin and pretilachlor at rates of 7.5, 10.0 and 2.5 kg a.i. ha(-1), respectively, under laboratory conditions, significantly increased microbial biomass C, N and P, resulting in greater availability of C, N and P in soil amended with farm yard manure. Application of thiobencarb highly induced microbial biomass C (46.3 %) and N (40.6 %), while pretilachlor and thiobencarb augmented microbial biomass P to the extent of 14.9 % and 14.1 %, respectively. Application of pendimethalin retained the highest amount of total N (19.9 %), soluble NO3 (-) (56 %) and available P (69.5 %) in soil. A similar trend was recorded with thiobencarb for oxidizable organic C (18.1 %) and with pretilachlor for exchangeable NH4 (+) (65.8 %). At the end of the experiment, the highest stimulation of bacteria was recorded with thiobencarb (29.6 %), while pretilachlor harboured the maximum number of actinomycetes (37.2 %) and fungi (40 %) in soil compared to the untreated control.
机译:以7.5、10.0和2.5千克a.i.的比例施用硫代苯威,二甲戊乐灵和丙草胺。 ha(-1)分别在实验室条件下显着增加了微生物生物量C,N和P,从而导致在用农田肥料改良的土壤中C,N和P的利用率更高。硫代苯甲威的施用高度诱导了微生物生物量碳(46.3%)和氮(40.6%),而丙草胺和硫代苯甲威的微生物生物量P分别增加了14.9%和14.1%。二甲戊乐灵的施用在土壤中保留了最高量的总氮(19.9%),可溶性NO3(-)(56%)和有效磷(69.5%)。对于可氧化的有机碳(18.1%)和苯丙草胺对于可交换的NH4(+)(65.8%),也记录了类似的趋势。在实验结束时,与未处理的对照相比,硫苯威(29.6%)记录了对细菌的最高刺激,而丙草胺在土壤中具有最大的放线菌(37.2%)和真菌(40%)数量。

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