Milk yield and composition a function of feeding of crossbred Holstein x Zebu cows confined under experimental conditions in Brazil - meta-analysis. [Portuguese]

Alessio, D. R. M. and Velho, J. P. and Knob, D. A. and Silveira, V. C. P. and Velho, I. M. P. H. and Hess, A. F. and Thaler Neto, A.

Arquivo Brasileiro de Medicina Veterinaria e Zootecnia (2019) 71: 667–676

DOI: 10.1590/1678-4162-10466

Abstract

The aim was to evaluate diet composition factors that may interfere with intake, digestibility, milk yield and composition of crossbred Holstein x Zebus cows confined under Brazilian experimental conditions. The meta-analysis was used for the survey of scientific works of public domain, covering the period from January 2000 to December 2015. The database consisted of 40 experiments with 159 treatments, involving 735 lactating cows. The voluntary intake of total digestible nutrients (TDN) is compromised by the acid detergent fiber (FAD) content of the diet, related to dry matter digestibility (DM) and neutral detergent fiber (NDF), affecting dietary efficiency (DE). The relation of the non-fibrous carbohydrate (NFC) content of the diet with the lactose content and the effect of the DM diet content and the high NDF content on the voluntary intake are specific characteristics of the types of roughage used. Dietary NDT intake is affected by the digestibility of DM and, mainly, NDF, depending on the proportion and characteristics of the nutrients used in the diet, and these factors have an impact on dietary efficiency, as well as on milk composition.

Citation

Alessio, D. R. M., Velho, J. P., Knob, D. A., Silveira, V. C. P., Velho, I. M. P. H., Hess, A. F., & Thaler Neto, A. (2019). Milk yield and composition a function of feeding of crossbred Holstein x Zebu cows confined under experimental conditions in Brazil - meta-analysis. [Portuguese]. Arquivo Brasileiro De Medicina Veterinaria e Zootecnia, 71(2), 667–676. https://doi.org/10.1590/1678-4162-10466 cattle, cows, dairy cattle, dairy cows, meta-analysis, Animal Nutrition (Production Responses) [LL520], Brazil, Food Composition and Quality [QQ500], zebu, Animal Nutrition (Physiology) [LL510], cattle feeding, Dairy Animals [LL110], diets, diet, fiber, fibre, feeding stuffs, feeds, milk, Milk and Dairy Produce [QQ010], milk production, dry matter, feed intake, digestibility, milk yield, crosses, roughage, crossbreds, Feed Composition and Quality [RR300], lactose, milk sugar, cattle breeds, Holstein-Friesian, milk components, milk composition, milk constituents, milk quality, total digestible nutrients

Keywords

• cattle
• cows
• dairy cattle
• dairy cows
• meta-analysis
• Animal Nutrition (Production Responses) [LL520]
• Brazil
• Food Composition and Quality [QQ500]
• zebu
• Animal Nutrition (Physiology) [LL510]
• cattle feeding
• Dairy Animals [LL110]
• diets
• diet
• fiber
• fibre
• feeding stuffs
• feeds
• milk
• Milk and Dairy Produce [QQ010]
• milk production
• dry matter
• feed intake
• digestibility
• milk yield
• crosses
• roughage
• crossbreds
• Feed Composition and Quality [RR300]
• lactose
• milk sugar
• cattle breeds
• Holstein-Friesian
• milk components
• milk composition
• milk constituents
• milk quality
• total digestible nutrients