GLOBAL EFFECTS OF MAXIMIZING THE FORAGE IN PRODUCTION AND QUALITY OF BOVINE MILK AND MEAT. A META-ANALYSIS

The potential effects of the type of forage (TF) and forage proportion (FP) in bovine diets, regarding nutrient digestibility and productive behaviour, were quantified from previously published data. Variance and orthogonal polynomial analysis were performed on a sample of 44 in vivo and 40 in situ...

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Bibliographic Details
Published inInterciencia Vol. 45; no. 10; pp. 461 - 468
Main Authors Tirado-Estrada, Gustavo, Tirado-González, Deli Nazmín, Medina-Cuéllar, Sergio Ernesto, Miranda-Romero, Luis Alberto, González-Reyes, Mónica, Sánchez-Olmos, Luis Antonio, Castillo-Zúñiga, Iván
Format Journal Article
LanguageEnglish
Published Caracas Interciencia Association 01.10.2020
Interciencia
Subjects
Animal fat
Beef cattle
Cow's milk
Diet
Digestibility
Dry matter
Experiments
Feed conversion
Feeds
Forage
Grasses
Legumes
Meat
Meta-analysis
Milk
Milk production
Oils & fats
Optimization
Polynomials
Statistical analysis
Variance analysis
México
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Summary:The potential effects of the type of forage (TF) and forage proportion (FP) in bovine diets, regarding nutrient digestibility and productive behaviour, were quantified from previously published data. Variance and orthogonal polynomial analysis were performed on a sample of 44 in vivo and 40 in situ experiments from randomly selected articles. The model included: 1) FT (legumes and grasses), 2) FP, and 3) random effect experiments within articles [Exp(Art)]. The in situ dry matter and neutral detergent fiber disappearance (ISDMD and ISNDFD) and ruminant productive behavior variables were analyzed. The dry matter intake (DMI), milk production, and milk protein and fat were similar or greater in legume-based diets with FP[mayor que o igual a]50% than in grass-based diets with FP<50%. In contrast, negative effects in animal performance were observed in both legume-based diets with FP<50% and grass-based diets with FP[mayor que o igual a]50%. Cubic trends were observed in milk and milk fat production; the optimal FP was 50% and 37% for legume- and grass-based diets, respectively. Increasing FP from 42 to 50% in grass-based diets negatively and linearly affected the average daily gain (ADG) and feed conversion (FC) of beef cattle. In certain legume-based diets, decreasing the proportion of concentrate and/or grains could improve the DMI, and the production and quality of bovine milk.
ISSN:0378-1844
2244-7776