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Effect of agrochemicals on soil microorganisms of a rice culture

机译：农用化学品对水稻栽培土壤微生物的影响

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This paper show an analysis of the effect of agrochemicals used in a rice crop on the abundance of Oxisol soil microorganisms in the region of the Eastern Plains of Colombia, under field conditions. Evaluated Agrochemicals were Glyphosate, Bispiribac, Azoxystrobin and Malathion, applied in commercial dosages, in a block design with repeated measures. For the enumeration of microorganisms, soil samples were taken from rhizospheric soil using the transects methodology. From the samples, microbial counts were carried out using the method of dilution in plate and the data were analyzed using the Minitab 14 software using analysis of variance and test for multiple comparisons. In the counts bacteria Gram (+), Gram (-), actinomycetes, and functional groups: nitrogen fixers, and phosphorus solubilizing, together with the fungus, Trichoderma spp., Fusarium spp., and Penicillium spp. were found. In general, fungi, actinomycetes and the phosphorus solubilizing microorganisms were more affected by the agrochemicals with reductions in their abundance. Bacteria presented varying behaviors depending on the agrochemical and the nitrogen fixers were stimulated by the treatments. These results indicate that the chemicals may impact in different ways to the microorganisms that are responsible for the decomposition of organic matter.
机译：本文显示了在田间条件下，水稻作物中使用的农用化学品对哥伦比亚东部平原地区大量Oxisol土壤微生物的影响的分析。被评估的农药是草甘膦，比斯匹巴克，阿齐斯特罗宾和马拉硫磷，以商业剂量施用，采用重复测量的块状设计。为了进行微生物计数，使用样带法从根际土壤中取样。从样品中，使用平板稀释法进行微生物计数，并使用Minitab 14软件使用方差分析和多重比较检验对数据进行分析。在计数中，细菌有革兰氏菌（+），革兰氏菌（-），放线菌和官能团：固氮剂和磷溶解性，以及真菌，木霉属，镰刀菌属和青霉菌。被发现。通常，真菌，放线菌和磷增溶微生物受农药的影响更大，其丰度降低。细菌表现出不同的行为，这取决于农用化学品，并且固氮处理受到处理的刺激。这些结果表明，化学物质可能以不同方式影响负责有机物分解的微生物。

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