Rafael Villela Barletta

ORCID: 0000-0003-3903-4219
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About
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Research Areas
  • Reproductive Physiology in Livestock
  • Ruminant Nutrition and Digestive Physiology
  • Genetic and phenotypic traits in livestock
  • Fatty Acid Research and Health
  • Rural Development and Agriculture
  • Animal health and immunology
  • Reproductive Biology and Fertility
  • Infant Nutrition and Health
  • Digestive system and related health
  • Animal Nutrition and Physiology
  • Phytoestrogen effects and research
  • Natural Products and Biological Research
  • Ovarian function and disorders
  • Soil Management and Crop Yield
  • Effects of Environmental Stressors on Livestock
  • Agricultural and Food Sciences
  • Control and Dynamics of Mobile Robots
  • Global Trade and Competitiveness
  • Wireless Power Transfer Systems
  • Obstructive Sleep Apnea Research
  • Omental and Epiploic Conditions
  • Hepatitis B Virus Studies
  • Peanut Plant Research Studies
  • Phytase and its Applications
  • Infrared Thermography in Medicine

University of Wisconsin–Madison
2015-2021

Universidade de São Paulo
2011-2019

Dairy Management
2019

Universidade Brasil
2012-2014

Sapienza University of Rome
1989

Objectives were to evaluate the effect of feeding rumen-protected methionine (RPM) in pre- and postpartum total mix ration (TMR) on lactation performance plasma AA concentrations dairy cows. A 470 multiparous Holstein cows [235 at University Wisconsin (UW) 235 Cornell (CU)] enrolled approximately 4 wk before parturition, housed close-up dry cow replicated pens. Pens randomly assigned treatment diets (pre- postpartum, respectively): UW control (CON) diet = 2.30 2.09% Met as percentage...

10.3168/jds.2020-19021 article EN publisher-specific-oa Journal of Dairy Science 2021-04-16

Ruminants have a unique metabolism and digestion of unsaturated fatty acids (UFA). Unlike monogastric animals, the acid (FA) profile ingested by ruminants is not same as that reaching small intestine. The objective this study was to evaluate whole raw soybeans (WS) in diets replacer for calcium salts (CSFA) terms UFA abomasal digesta early- mid-lactation cows. Eight Holstein cows (80 ± 20 d milk, 22.9 0.69 kg/d milk yield, 580 kg body weight; mean standard deviation) with ruminal cannulas...

10.3168/jds.2017-13666 article EN publisher-specific-oa Journal of Dairy Science 2018-07-13

The objective of this study was to evaluate the productive performance, nutrients digestion and metabolism three different genetic groups fed with same diet based on corn silage. 30 heifers in growth were used cattle, following: Nellore (Bos taurus indicus) (n = 10), Holstein taurus) Mediterranean buffaloes (Bubalis bubalis) 10). animals received experimental composed silage concentrate for growing heifers. In evaluation consumption total apparent digestibility dry matter aid internal...

10.1016/j.livsci.2011.04.005 article EN publisher-specific-oa Livestock Science 2011-05-11

Oilseeds offer some protection to the access of ruminal microorganisms and may be an alternative calcium salts fatty acids (FA), which are not fully inert in environment. This study aimed evaluate effects different sources FA supplementation on apparent total tract nutrient digestibility, milk yield composition, energy balance (EB) cows during transition period early lactation. We compared diets rich C18:2 C18:3 FA. Multiparous Holstein were randomly assigned receive one four diets: control...

10.1017/s1751731116000264 article EN cc-by-nc-nd animal 2016-01-01

The objective of this study was to evaluate the influence unsaturated fatty acids in diets for dairy cows during transition period and early lactation on intake, digestion nutrient balance. Thirty-six multiparous pregnant Holstein were randomly distributed receive one experimental from 35 days before expected date parturition 84 post-partum. Diets fed as a total mixed ration follows: control (C); soybean oil (SO), based inclusion 30 g/kg (DM basis); calcium salts (CS), basis). Pre-partum dry...

10.1590/s1516-35982014000400008 article EN cc-by Revista Brasileira de Zootecnia 2014-04-01

The objective of this study was to evaluate the utilization different sources unsaturated long-chain fatty acids in diets for dairy cows during transition period and early lactation on milk acid profile composition protein fraction. Thirty-six Holstein were divided into three groups, fed following diets: control (C); soybean oil (SO); calcium salts (CS). samples utilized analysis obtained weekly from parturition twelve weeks lactation; each one originated two daily milkings. Milk total...

10.1590/s1516-35982013001100008 article EN cc-by Revista Brasileira de Zootecnia 2013-11-01

The aim of this study was to evaluate the effects high levels whole raw soya beans in diets lactating cows. Twelve Holstein dairy cows were used, randomized three 4 × balanced and contemporary Latin squares fed following diets: (i) control (C), without including beans; (ii) 80 g/kg DM (G80); (iii) 160 (G160); (iv) 240 (G240). There significant reduction (p < 0.05) dry matter intake (kg/day) supplemented with G240 compared C (23.8 vs. 25.3 respectively). presented lower crude protein...

10.1111/jpn.12406 article EN Journal of Animal Physiology and Animal Nutrition 2015-11-28

ABSTRACT The objective of this study was to determine the effect increasing monensin doses on intake, nutrient digestion, ruminal fermentation, nitrogen balance, blood metabolites, milk yield and composition lactating dairy cows. Twelve Holstein cows (135 ± DIM; 580 kg BW) were assigned three 4 × Latin square design, with 21-d periods. Cows randomly within each receive one following treatments: Control (C): 0 mg kg−1 DM monensin; Monensin 12 (M12): 24 (M24): 48 (M48): monensin. had quadratic...

10.1080/09712119.2019.1629298 article EN cc-by Journal of Applied Animal Research 2019-01-01

The objective of this study was to evaluate the effects diets rich in omega-3 and -6 fatty acids (FA) during transition period early lactation on size number follicles, oocyte embryo quality, blood metabolites Holstein cows. Forty-two cows were assigned diets: control (CON, with no fat sources dietary ether extract content 28.8 24.8 g/kg pre- post-partum periods, respectively); whole flaxseed (WF, diet FA), 60 80 WF pre respectively; raw soybeans (WS, omega-6 120 160 WS periods; calcium...

10.1080/1828051x.2017.1302823 article EN cc-by-nc Italian Journal of Animal Science 2017-03-20

The aim of this study was to evaluate the performance and blood parameters Simmental dairy cows, supplemented with 2 g/day ricinoleic acid (RA) in diet.Forty cows mid lactation, individually housed stable type tiestall, were used.The animals randomly assigned two treatments: 0 or g RA/animal/ day.The experimental period consisted 42 days divided into 21-day.It observed reduction dry matter intake (DMI), increased milk, fat FCM (fat corrected milk) yield, as well content milk that received RA...

10.4321/s0004-05922014000400002 article EN cc-by-sa Archivos de Zootecnia 2014-12-01

Differing soya bean particle sizes may affect productive performance and ruminal fermentation due to the level of fatty acid (FA) exposure cotyledon in grain because protein small particles is more rapidly degraded than large particles, which influence fibre digestion amounts ruminally undegradable nutrients. The objective this experiment was investigate effects raw size on performance, milk FA profile dairy cows. Twelve Holstein cows were assigned three 4 × Latin squares with 21-day...

10.1111/jpn.12413 article EN Journal of Animal Physiology and Animal Nutrition 2015-10-09
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