Evaluation of corn hybrids for silage grown in different locations

Abstract

The aim of this study was to evaluate the yield, morphometric and chemical characteristics, and the digestibility of various corn hybrids cultivated in different locations for silage production. Four corn hybrids were grown: P2866H, P3456H, P30R50VYH and P4285YHR, in four locations, defined as farm A; B; C and D. The hybrid P4285YHR presented the highest plant and ear insertion heights (2.72m, 1.52m respectively), with a minimum registered height of 2.63 m and 1.42 m, for plant and ear insertion height, and for that reason it presented the highest yield of fresh biomass (78,089kg ha-1). The TND values showed trend very close to that observed in the DISMS of the whole-plant, with hybrid P3456H presenting the highest estimated value (68.74%), and the hybrid P4285YHR the lowest among them (65.25%). In general, lower fibrous carbohydrates and lignin content, higher fibrous carbohydrates content, together with satisfactory grains participation in the plant structure led to a greater dry matter digestibility. Hybrids with lower plant heights do not necessarily have lower dry biomass yields, but hybrids of greater height and with high stem and leaf participation tend to have a higher aFDN content and less dry matter digestibility.

Híbridos de milho para utilização como silagem na bovinocultura leiteira

“…Assim, para se obter uma silagem de milho com alta qualidade, diversos fatores são importantes, mas a escolha do híbrido a se utilizar é o primeiro passo para se obter sucesso produtivo da cultura, visto que cada genótipo possui características próprias e únicas. Porém, a falta de informações regionais, pertinentes ao comportamento agronômico, produtivo e bromatológico dos materiais genéticos existentes no mercado, tornou-se um obstáculo para a escolha de híbridos de milho mais adequados à produção de silagem e a realidade de cada propriedade (Rosa et al, 2004;Neumann et al, 2021).…”