Does a high or moderate nutritional supplementation affect the puberty and productive performance of Nellore heifers?
Open Access
- 23 September 2022
- journal article
- research article
- Published by EDUFU - Editora da Universidade Federal de Uberlandia in Bioscience Journal
- Vol. 38, e38079
- https://doi.org/10.14393/bj-v38n0a2022-61302
Abstract
The effects of higher supplementation levels for young Nellore heifers fed tropical forages including their influence on puberty, need to be understood. This study investigated the influence of high and moderate supplementation levels on puberty onset and the productive performance of Nellore heifers. Thirty-six Nellore heifers (225 + 3.52 kg) were used in a completely randomized design, with three treatments: (I) no concentrate (control); (II) concentrate supplement at 4 g/kg body weight (BW); (III) concentrate supplement at 8 g/kg BW. Increased supplement level led to a linear increase in average daily gain (P < 0.05). The high supplementation level (8 g/kg BW) had the highest proportion of corpus luteum presence (82% of heifers), compared to the 4 g/kg BW treatment group (67%) and the control group (33%; P < 0.05). Our findings indicate that providing a high level of energy supplementation to Nellore heifers for approximately 100 d improves performance and increases the proportion of heifers that reach pubertyKeywords
This publication has 15 references indexed in Scilit:
- Cottonseed meal is a suitable replacement for soybean meal in supplements fed to Nellore heifers grazing Brachiaria decumbensAnimal Production Science, 2017
- Effects of ruminal and post-ruminal protein supplementation in cattle fed tropical forages on insoluble fiber degradation, activity of fibrolytic enzymes, and the ruminal microbial community profileAnimal Feed Science and Technology, 2016
- Combining Marandu grass grazing height and supplementation level to optimize growth and productivity of yearling bullsAnimal Feed Science and Technology, 2015
- Beef heifer growth and reproductive performance following two levels of pasture allowance during the fall grazing period1Journal of Animal Science, 2014
- Use of a stair-step compensatory gain nutritional regimen to program the onset of puberty in beef heifers1Journal of Animal Science, 2014
- Levels of Supplementation for Grazing Beef HeifersAsian-Australasian Journal of Animal Sciences, 2014
- Higher feeding diets effects on age and liveweight gain at puberty in crossbred Nelore × Hereford heifersTropical Animal Health and Production, 2014
- An evaluation of the performance and efficiency of nitrogen utilization in cattle fed tropical grass pastures with supplementationLivestock Science, 2014
- Use of serial ultrasound measures in the study of growth- and breed-related changes of ultrasonic measurements and relationship with carcass measurements in lean cattle breedsMeat Science, 2014
- Induction of precocious puberty in heifers I: Enhanced secretion of luteinizing hormone1Journal of Animal Science, 2006