草甘膦对大豆根际C、N微生物官能团的影响

M. Avanzi, L. S. Matsumoto, U. Albino, L. Rampazo, A. R. Barazetti, Igor M. O. Santos, G. Liuti, J. Mattos, M. Dealis, E. Niekawa, M. F. L. Andreata, G. Andrade
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引用次数: 1

摘要

免耕系统需要在播种前使用更多的除草剂来控制杂草,这增加了人们对此类产品可能对环境产生影响的担忧。然而,文献中很少有报道草甘膦对土壤微生物影响的研究。本研究的目的是评价两种草甘膦制剂对大豆根际微生物官能团的影响。试验在温室中进行,处理为异丙胺盐和草甘膦铵盐的最大和最大允许剂量的两倍。对照处理无应用。在选择培养基上采用平板计数法测定土壤细菌、真菌、放线菌、荧光假单胞菌、纤维素解菌、淀粉解菌、蛋白质解菌和自由固氮菌的数量。测定植株根干重、地上部干重、根瘤数和根瘤干重。除草剂的施用对微生物种群和植物生长影响不大。然而,某些微生物种群之间以及它们与植物之间的相互作用受到所施用草甘膦配方的影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Glyphosate impact on C and N microbial functional groups in soybean rhizosphere
The no-tillage system requires a higher use of herbicides to control weeds before sowing, increasing the concern over the effect that such products might have on the environment. However, few studies reporting the influence of glyphosate on soil microorganisms are available in the literature. The aim of this work was to evaluate the effect of two formulations of glyphosate on functional groups of microorganisms in soybean rhizosphere. The experiment was performed in a greenhouse, and the treatments were the isopropylamine salt and the ammonium salt of glyphosate at the maximum and twice the maximum allowed dose. The control treatment had no application. The populations of soil bacteria, fungi, actinomycetes, fluorescent pseudomonas, cellulolytics, amylolytics, proteolytics and free-living N-fixing were determined by plate counts on selective media. Plant root dry weight, shoot dry weight and the number and dry weight of nodules were determined. The application of herbicides had little effect on the populations of microorganisms, as well as on plant growth. Nevertheless, the interactions among some populations of microorganisms and between these and the plant were influenced by the formulation of the glyphosate applied.
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