Características morfoagronômicas do milho submetido a diferentes níveis de desfolha manual

• Autor(a) principal: Pereira, Marcel José Roma
• Data de Publicação: 2012
• Outros Autores: Bonan, Everton César Biazotti, Garcia, Anice, de Lima Vasconcelos, Ricardo [UNESP], Gíacomo, Karina dos Santos, Lima, Marcelo Ferreira
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://dx.doi.org/10.1590/S0034-737X2012000200008; http://hdl.handle.net/11449/73209
• topic: Cob; Grain yield; Zea mays L.; Zea mays

The present study was conducted to evaluate the damage caused by defoliation in maize. The experiment was carried out in 2005/2006 at Roma Farm, Ituverava-SP, using the triple hybrid CODETEC 304®. The experiment consisted of split plots (split-plot), which were distributed at random in three blocks, with the main treatment manual defoliation (30%, 40%, 60% and 80% defoliation) in the plots and as the secondary treatment the phenological phases (D1, D2 and D3) with three replicates for each treatment and a control plot (0% defoliation) for each block. It was evaluated the production of plots (g/m2), the average size of the spikes (cm) and the average weight of thousand grains (g). According to the results, it was concluded that the source-sink relations were negatively affected, and the treatment with 80% defoliation was the one that most affected all variables, thus, it is a level of defoliation that is responsible for the largest losses, with no means of compensation for the maize crop.