Caracterização agronômica e bromatológica de híbridos de milho para ensilagem

Abstract

ResumoObjetivou-se avaliar as características agronômicas e químico-bromatológicas de híbridos de milho para ensilagem. Os tratamentos avaliados foram nove híbridos de milho (MX 300, RB 9308, 2B655, XB 6012, GNZ 2500, PL6890, PRE 32D10, PRE 22T10 e AG 1051), com três repetições. As maiores produções de MV foram verificadas nos híbridos PL6890 e PRE 32D10, enquanto a maior produção de MS foi observada no híbrido PRE 32D10 (13,43 t ha -1 ). Os híbridos PRE 32D10 e PRE 22T10 destacaram-se por apresentarem maior porcentagem de lâminas foliares em relação à planta inteira, enquanto a menor porcentagem de colmos foi encontrada nos híbridos MX 300, 2B655 e XB 6012, entretanto a maior relação folha:colmo foi verificada no híbrido XB 6012 (0,49). Observou-se maior teor de PB no híbrido PRE 32D10 (9,10% da MS), enquanto o menor teor de FDN (57,78% da MS) e celulose (24,27% da MS) foram verificados no híbrido GNZ 2500. O híbrido PL6890 apresentou maior teor de FDA (39,20 % da MS) e lignina (8,63% da MS), os demais híbridos apresentaram valores inferiores. Verificou-se menor N retido na FDN (NIDN) no híbrido RB 9308, enquanto a menor retenção de N em FDA (NIDA) ocorreu no híbrido 2B655. A menor capacidade tampão (CT) foi verificada no híbrido 2B655 (0,29). Embora haja diferenças na composição químico-bromatológica dos híbridos de milho avaliados neste estudo, recomenda-se utilizar os híbridos MX 300, PL6890 e PRE 32D10 por apresentarem produção de matéria seca mais elevada, os quais podem refletir na amortização dos custos na produção das silagens. Palavras-chave: Parede celular, população de plantas, produtividade, Zea mays AbstractOur aim was to evaluate agronomic and chemical characteristics of corn hybrids to ensiling. It were evaluated nine corn hybrids (MX 300, RB 9308, 2B655, XB 6012, GNZ 2500, PL6890, PRE 32D10, PRE 22T10 e AG 1051), with three replicates. The higher fresh matter yield were observed in the hybrids PL6890 and PRE 32D10, while the dry matter yield was observed in the hybrid PRE 32D10 (13.43 t ha -1 ). The hybrids PRE 32D10 and PRE 22T10 stood out to present higher percent of leaf in relation to whole plant, while the lower percent of stems was found in the hybrids MX 300, 2B655 and XB 6012, however the higher leaves: stems relation was found in XB 6012 (0.49). There was higher CP

<b>Breeding potential of S4 maize lines in topcrosses for agronomic and forage traits

“…The GMY ranged from 48,767 kg ha -1 (TCH 182) to 87,714 kg ha -1 (TCH 65) (Table 3). These values are higher than those reported by Assis et al (2014) in an evaluation of the agronomic characteristics of corn hybrids during ensiling. Nineteen TCHs did not differ statistically from the check hybrids P30F53 and Status, and they were superior to the commercial hybrids Penta and Dow8460 (tester).…”

“…The DMY (Table 3) were higher than those reported by Rosa et al (2004), who studied the behavior of maize hybrids in the Rio Grande do Sul state, and by Assis et al (2014), who evaluated the agronomic characteristics of corn hybrids during ensiling in São Paulo State. However, the DMY values were similar to the value presented by Jaremtchuk et al (2005), who reported an average of 20,730 kg ha -1 in an evaluation of the agronomic and bromatological parameters of 20 maize hybrids in eastern Paraná State.…”

Forage Yield and Silage Quality of Intercropped Maize+Soybean With Different Relative Maturity Cycle

“…Corn hybrid P30F53 with medium-maturity cycle showed greater green biomass and dry matter yield compared to hybrid P1630 with early-maturity cycle (difference of 19.282 and 4.609 Kg ha -1 , respectively). Vieira et al (2016) and Assis et al (2014) also reported differences in the biomass accumulation potential for maize, being the medium-maturity hybrids higher productive. One concern for production of short-season maize hybrids is that there is less time for leaf area production and for interception of photosynthetically active radiation (PAR) (Edwards et al, 2005).…”

Meta-analysis of corn plants, green fodder (ensilage), and silages of different types of maize hybrids used in experimental conditions in Brazil

“…Types of Hybrids database was composed of data from the following publications:Alvarez, Pinho and Borges (2006);Alves, Ceccon and Leite (2013);Andrade, Dourado and Candido (2005);Assis et al (2014);Beleze et al (2003aBeleze et al ( , 2003b;Borghi, Crusciol, Costa and Mateus (2006);Cecato et al (2007);Farinelli and Lemos (2010);Flaresso, Gross and Almeida (2000);Gimenes et al (2006aGimenes et al ( , 2006b; Goes, Rodrigues, Takasu and Arf (2013); M. D. S. Gomes, Von Pinho, Oliveira, Ramalho and Viana (2002); Gralak et al (2014); Jaremtchuk et al (2005); Lobato, Von Pinho, Von Pinho and Ramalho (2005); Lupatini, Maccari, Zanette, Piacentini and Neumann (2004); Mello, Nörnberg, Rocha and David (2005); Mendes, Von Pinho, Pereira, Farias and Souza (2008); F. C. L. Oliveira et al (2011); J. S. E. Oliveira et al (2003); Oliveira, Jobim, Silva and Bumbieris (2013); Paterniani, Ferreira, Duarte and Gallo (2010); Pedroso, Ezequiel, Osuna and Santos (2006); Pereira, Von Pinho, Souza, Santos and Fonseca (2011); Pimentel, Silva, Valadares, Cecon and Santos (1998); Pinho, Vasconcelos, Borges and Rezende (2006); Pinto et al (2010);Ramos et al (2002);Resende, Von Pinho and Vasconcelos (2003);Restle et al (2002);Rodrigues, Andrade, Ruzante, Lima and Melotti (2002);Rodrigues et al (2004);Rosa et al (2004aRosa et al ( , 2004b;Sangoi et al (2006);Santos, Silva, Carvalho and Caione (2010);Senger, Mühlbach, Sánchez, Peres and Lima (2005); A. V Silva et al (2005Silva et al ( , 2006Silva et al, (2003)…”