Authors: Luiz Henrique Saes Zobiole Rubem Silvério de Oliveira Don Morgan Huber Jamil Constantin César de Castro Fábio Alvares de Oliveira Adilson de Oliveira
Publish Date: 2009/07/04
Volume: 328, Issue: 1-2, Pages: 57-69
Abstract
Although glyphosateresistant GR technology is used in most countries producing soybeans Glycine max L there are no particular fertilize recommendations for use of this technology and not much has been reported on the influence of glyphosate on GR soybean nutrient status An evaluation of different cultivar maturity groups on different soil types revealed a significant decrease in macro and micronutrients in leaf tissues and in photosynthetic parameters chlorophyll photosynthetic rate transpiration and stomatal conductance with glyphosate use single or sequential application Irrespective of glyphosate applications concentrations of shoot macro and micronutrients were found lower in the nearisogenic GRcultivars compared to their respective nonGR parental lines Shoot and root dry biomass were reduced by glyphosate with all GR cultivars evaluated in both soils The lower biomass in GR soybeans compared to their isogenic normal lines probably represents additive effects from the decreased photosynthetic parameters as well as lower availability of nutrients in tissues of the glyphosate treated plants
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