Agronomic performance of RR® soybean cultivars using different pre-sowing desiccation periods and distinct post-emergence herbicides

• Autor(a) principal: Felisberto, Guilherme
• Data de Publicação: 2015
• Outros Autores: Bruzi, Adriano Teodoro, Zuffo, Alan Mario, Zambiazzi, Everton Vinicius, Soares, Igor Oliveri, Rezende, Pedro Milanez de, Botelho, Flávia Barbosa Silva
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UFLA
• Texto Completo: http://repositorio.ufla.br/jspui/handle/1/11547
• topic: Soybean – Planting; Plants - Effect of herbicides; Glyphosate - Physiological effect; Soja – Plantio; Plantas - Efeito dos herbicidas; Glifosato - Efeito fisiológico; Glycine Max

The current study aims to measure the effect of pre-sowing desiccation period and verify the influence of post-emergence herbicide on soybean agronomic traits and grain yield. The experiments were carried out according to a randomized complete block design with three replications during two crop seasons (2012/13 and 2013/14), using split plot design. Five soybean cultivars were used (BRS Favorita RR® , TMG 1179 RR® , TMG 1176 RR® , Anta 82 RR® , NS 7100 RR® ). Two desiccation periods were adopted 7 days before sowing and just before sowing. Two types of weed management were tested in postemergence - using glyphosate (Roundup Ready® ) and a soybean selective herbicide (Robust® ). During the 2013/2014 crop season, manual weeding was also used. The evaluated traits were plant height, first pod insertion, number of pods per plant and number of seeds per pod, 1,000-grain weight and grain yield. Considering the distinct post-emergence herbicides, there was no significant difference between glyphosate and Robust® . Nevertheless, the desiccation period showed significant differences in plant height, number of pods per plant and grain yield. The soybean grain yield was higher when desiccation was done 7 days before sowing. Therefore, an association between desiccation period and soybean performance was assumed.