skip to main content
Idioma:
Primo Advanced Search
Primo Advanced Search Query Term
Primo Advanced Search prefilters
Busca Simples

Harvesting maturities of corn silage hybrids on the performance of finishing beef cattle

Volpato, Andreia

Biblioteca Digital de Teses e Dissertações da USP; Universidade de São Paulo; Escola Superior de Agricultura Luiz de Queiroz 2023-03-31

Acesso online

  • Título:
    Harvesting maturities of corn silage hybrids on the performance of finishing beef cattle
  • Autor: Volpato, Andreia
  • Orientador: Nussio, Luiz Gustavo
  • Assuntos: Colhedora Auto Propelida; Colheita; Cultivar; Harvest; Self-Propelled Harvester
  • Notas: Tese (Doutorado)
  • Descrição: Whole-plant corn silage (WPCS) is the main roughage used in finishing beef cattle diets. Decisions that precede the ensiling process, such as hybrid selection and plant maturity at harvest, interfere with the nutritional value and quality of the silage. Nonetheless, an experiment was conducted with the objective of evaluating the effect of hybrid and maturity on the performance of finishing cattle. Two corn hybrids were sown: hybrid A (DKB 390, Dekalb) and hybrid B (BM 3066, Bio Matrix). For harvesting, a self-propelled harvester with a grain processor was used. Part of the crop was harvested 105 days after sowing (DAS), and the rest 114 days after sowing. The forages were stored in four silo piles for 89 days. Sixty Nelore bulls (402 kg ± 29 kg, 20 months old) were distributed in blocks and housed in individual pens for 103 days. The treatments consisted of two corn hybrids and two harvesting points in a factorial arrangement, namely: 1) hybrid A harvested with 105 DAS; 2) hybrid A harvested with 114 DAS; 3) hybrid B harvested with 105 DAS; and 4) hybrid B harvested with 114 DAS. In silage samples, analyses of chemical composition, pH, fermentation products, microbial count, particle distribution, and grain processing were carried out. The dry matter intake (I) of the bulls was determined daily. Animal-related variables were measured at the beginning of the experimental period and every 30 days. Harvesting WPCS with 114 DAS resulted in a higher variation in daily dry matter intake (105 DAS = 7.3 vs. 114 DAS = 8.7%). The hybrid and maturity interaction showed a tendency to influence DMI and average weight gain in the animals. The hot carcass weight and dressing were similar between treatments. Harvesting with 114 DAS resulted in less fat deposition on the rump (105 DAS = 11.5 mm vs. 114 DAS = 9.7 mm). Animals that received silage harvested with 105 DAS showed a higher preference for particles between 8 and 4 mm. In conclusion, late harvesting of whole-plant corn silage increases the variation in finishing beef cattle intake. Corn silage harvested with 114 DAS reduces rump fat deposition and the selection of small roughage particles. The consumption and weight gain of the animals indicated that the effects of advancing corn plant maturity might depend on the type of hybrid.
  • DOI: 10.11606/T.11.2023.tde-10072023-115915
  • Editor: Biblioteca Digital de Teses e Dissertações da USP; Universidade de São Paulo; Escola Superior de Agricultura Luiz de Queiroz
  • Data de criação/publicação: 2023-03-31
  • Formato: Adobe PDF
  • Idioma: Inglês
Links
Voltar para lista de resultados
Ir para página anteriorAnterior Resultado  3 AvançarIr para próxima página

  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

Buscando em bases de dados remotas. Favor aguardar.