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Calculating herbage utilization and intake by dairy cows under subtropical conditions using conventional field measurement techniques or the HerbValo method.
Wlodarski, Letícia; Delagarde, Rémy; Pozo, Claudio A; Ribeiro Filho, Henrique M N; Temp, Larissa B; Moraes, Matheus L; Santos, Mateus G; Kozloski, Gilberto V.
Afiliação
  • Wlodarski L; Departamento de Zootecnia, Universidade Federal de Santa Maria, Santa Maria, RS, 97105-340, Brazil.
  • Delagarde R; PEGASE, INRAE, InstitutAgro, F-35590, Saint-Gilles, France.
  • Pozo CA; CIT-Formosa, CONICET; Facultad de Recursos Naturales, Universidad Nacional de Formosa, 3600, Formosa, Argentina.
  • Ribeiro Filho HMN; Departamento de Produção Animal e Alimentos, Universidade do Estado de Santa Catarina, Lages, SC, 88520-000, Brazil.
  • Temp LB; Departamento de Zootecnia, Universidade Federal de Santa Maria, Santa Maria, RS, 97105-340, Brazil.
  • Moraes ML; Departamento de Zootecnia, Universidade Federal de Santa Maria, Santa Maria, RS, 97105-340, Brazil.
  • Santos MG; Departamento de Zootecnia, Universidade Federal de Santa Maria, Santa Maria, RS, 97105-340, Brazil.
  • Kozloski GV; Departamento de Zootecnia, Universidade Federal de Santa Maria, Santa Maria, RS, 97105-340, Brazil. gilberto.kozloski@ufsm.br.
Trop Anim Health Prod ; 56(1): 26, 2023 Dec 23.
Article em En | MEDLINE | ID: mdl-38135864
ABSTRACT
This study aimed to evaluate the HerbValo method in comparison to conventional field measurement techniques as a tool for estimating the herbage utilization and dry matter (DM) intake by grazing dairy cows under subtropical conditions. It was carried out during 18 months in a commercial farm of Southern Brazil. The herbage utilization was estimated monthly in two to four randomly selected paddocks (total n = 40) using the rising-plate meter or the double-sampling technique. In parallel, the herbage utilization was estimated by the HerbValo method, which is based on simple descriptions of the herd, supplements, pasture and grazing management. Values of herbage utilization estimated by field techniques were linearly (P < 0.01) related to those estimated by HerbValo, with no effect of pasture type (tropical vs. temperate) on the origin or on the slope of the regression (slope = 0.97; origin = -0.1; R2 = 0.81; rsd = 0.17 t DM/ha). At cow × day level, values of herbage intake estimated by field techniques were also linearly related to those estimated by HerbValo (P < 0.01; R2 = 0.82; rsd = 1.30 kg DM/cow/day). A negative linear relationship (P < 0.01) between herbage and supplement intake was obtained for both field (slope = -1.06; R2 = 0.72; rsd = 1.64) and HerbValo (slope = -0.92; R2 = 0.82; rsd = 1.08) approaches. Herbage utilization and intake by a dairy herd in a subtropical grazing-based system can be reliably estimated by the HerbValo method with the advantage of not requiring direct field pasture measurements.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Lactação / Leite Limite: Animals País/Região como assunto: America do sul / Brasil Idioma: En Revista: Trop Anim Health Prod Ano de publicação: 2023 Tipo de documento: Article País de afiliação: Brasil País de publicação: Estados Unidos
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Lactação / Leite Limite: Animals País/Região como assunto: America do sul / Brasil Idioma: En Revista: Trop Anim Health Prod Ano de publicação: 2023 Tipo de documento: Article País de afiliação: Brasil País de publicação: Estados Unidos