Effects of mineral or protein-energy supplementation and genetic group on metabolism parameters of young beef bulls grazing tropical grass during the rainy season

The aim of this study was to evaluate the influence of genetic group, sex and level of protein-energy supplementation on the performance and carcass traitsultrasound prediction of weaned calves Nellore and crossbred animals ½ Nellore x ½ Aberdeen Angus. A completely randomized design in a factorial 2x2x2, were used, with two levels of protein-energy supplementation, two sex and two genetic groups. Fifty-six animals were used (28 Nellore and 28 crossbred ½ Nellore x ½ Aberdeen Angus), equally divided between males and females, maintained on grazing Brachiariabrizanthacv. Marandu and evaluated in three experimental periods: period 1 = protein-energy supplementation in the dry season; period 2 = protein-energy supplementation during the rainy season; period 3 = only mineral supplementation. In the dry season, they were supplemented with levels of 0.5 and 1% of body weight (BW) and in the rainy season with 0 and 1% BW. Dry matter intake (kg day-1, % BW, g kgBW0.75-1) was estimated. In vivo ultrasound measurements of carcass were: loin eye area (LEA), fat thickness (FT) and rump fat thickness (RFT). There was influence of genetic group and protein-energy supplementation levels on average daily gain (ADG) of animals in period 1 and 2 (P < 0.05). Sex affected the ADG only in period 2, and the males had 754 gday-1 and females, 582 g day-1. There was no interaction of genetic group x sex x supplementation level. At the end of the experimental period (end of period 3), it was found that male animals and crossbred animals ½ Nellore x ½ Aberdeen Angus had higher ADG (716 and 748 g day-1, respectively). The values of dry matter intake (DMI) were influenced by genetic group and sex, in all periods, verifying highest intake in crossbred animals ½ Nellore x ½ Aberdeen Angus, with better feed conversion for crossbred animals. Regarding ultrasound measurements taken on the carcass, the influence of sex on FT and RFT, it was observed, and the males showed higher values, 3.24 and 4.62 mm, respectively. LEA was influenced by protein-energy supplementation levels in the second period, herein animals receiving 1% of BW, showed higher values (56.04 cm2) than those receiving 0.5% of BW supplement (48.38 cm2). The use of protein-energy supplementation with 0.5% of BW in the dry season and 1% of BW in the rainy season, the best results of performance and contributes to larger loin eye area.

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PSII-9 Drylot weaned calves at dry-to-rainy transition and rainy season and their effects on the growing phase

Journal of Animal Science ◽

10.1093/jas/skaa278.705 ◽

2020 ◽

Vol 98 (Supplement_4) ◽

pp. 401-402

Author(s):

Felipe A Nascimento ◽

Laura F Prados ◽

Luciana M Sousa ◽

Ivanna M Oliveira ◽

Flávio D Resende ◽

...

Keyword(s):

Rainy Season ◽

Transition Period ◽

Block Design ◽

Mineral Salt ◽

Energy Supplement ◽

Protein Energy ◽

Nutritional Strategy ◽

Randomized Complete Block Design ◽

Ad Libitum ◽

Energy Supplementation

Abstract The objective of this study was to determine the best nutritional strategy for weaned calves at dry-to-rainy transition and rainy season and their effects on the growing phase. One hundred sixteen Nellore weaned males (initial BW of 173±23 kg; 10 months) were used in a randomized complete block design (blocked by BW) in a 2×2 factorial arrangement of treatments (divided in 12 lots with 9 or 10 animals/lot). Factor 1 was the strategy in the dry-to-rainy season transition (period I; pasture vs. drylot) and factor 2 was the strategy for the rainy season [period II; mineral salt ad libitum (MS) vs. supplement 3 g/kg BW]; consisting of four treatments: pasture in period I and MS in period II; pasture in period I and protein-energy supplement in period II (PEII); drylot in period I and mineral salt in period II; drylot in period I and PEII. At period I, all animals received a protein-energy supplementation (5 g/kg BW). The experiment lasted 244 days. Data were analyzed using the PROC MIXED of SAS. In period I, animals from drylot had highest final BW and ADG (P < 0.01; Table 1). There was no interaction among factors (P ≥ 0.772) in period II. In period II, ADG and carcass gain were highest from pasture animals (P < 0.01). Final BW and HCW were similar (P >0.788) at the end of period II, showing that animals recovery BW. Among strategies at rainy season, animals fed PEII had greater final BW and ADG (P < 0.01). Overall growing phase, HCW and carcass gain were greater for animals fed PEII (P < 0.01). Regardless of the strategy used in the dry-to-rainy season transition, animals were able to equalize final BW at the end of growing phase. In addition, protein-energy supplement at rainy season improves animal performance at the end of growing phase.

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Productive, nutritional, and metabolic performance of Chino Santandereano cattle receiving different degrees of protein-energy supplementation

Tropical Animal Health and Production ◽

10.1007/s11250-021-02643-0 ◽

2021 ◽

Vol 53 (2) ◽

Author(s):

David Esteban Contreras Marquez ◽

Emiro Rafael Canchila Asensio ◽

Edwin Davier Correa Rojas ◽

Candido José Ramírez Villareal ◽

Yeisson Yesid Robles Yaruro ◽

...

Keyword(s):

Protein Energy ◽

Energy Supplementation ◽

Metabolic Performance

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PREDICTING THE EFFICACY OF PROTEIN-ENERGY SUPPLEMENTATION IN FRAIL OLDER ADULTS LIVING IN COMMUNITY

Journal of Frailty & Aging ◽

10.14283/jfa.2014.13 ◽

2014 ◽

pp. 1-6

Author(s):

C.O. KIM

Keyword(s):

Older Adults ◽

Nutritional Assessment ◽

Linear Regression Analysis ◽

Mini Nutritional Assessment ◽

Community Dwelling ◽

Home Healthcare ◽

Post Intervention ◽

Frail Older Adults ◽

Protein Energy ◽

Energy Supplementation

Background:Protein-energy malnutrition is a major cause of functional decline in the elderly and isclearly an important component of frailty. However, limited evidence is available about how to select frailindividuals most benefiting from protein-energy supplementation. Objectives:1) To investigate factors associatedwith stronger benefits from protein-energy supplementation, and 2) to test the hypothesis that the severity offrailty is associated with the efficacy of protein-energy supplementation. Design:Secondary analysis of data froma pre-post-intervention study and a clinical trial. Setting:National Home Healthcare Services in Gangbuk-gu,Seoul, South Korea. Participants:123 community-dwelling frail older adults [usual gait speed (UGS) <0.6m/secand Mini Nutritional Assessment (MNA) <24]. Intervention:Each participant was received with two 200 mL perday of commercial liquid formula (providing additional 400 kcal of energy and 25 g of protein per day) for 12weeks. Measurements:Relative change in the Physical Functioning (PF) and Short Physical Performance Battery(SPPB) score between the baseline and 12-week follow-up assessments were measured. Results:Multilevelmixed-effect linear regression analysis showed that a lower level of baseline UGS was associated with a greaterimprovement in PF and SPPB score after adjustment for age, gender, education, living status, beneficiary ofpublic assistance, number of chronic diseases, compliance, and type of dataset (p<0.001). A lower level ofbaseline MNA score was associated with greater change in PF and SPPB score after adjustment for multiplecovariates (p<0.045). Participants with severe frailty (UGS <0.3 m/sec + MNA <17) showed 52.4% and 44.6%more relevant improvements in PF and SPPB score, respectively, than those with mild frailty (UGS 0.3-0.6 m/sec+ MNA 17-24) (p<0.001). Conclusion:Slower UGS and lower MNA score are independently associated with thegreater efficacy of protein-energy supplementation on functional status.

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