Nutritional strategies for heifers under grazing system: productive and nutritional performance, metabolic profile and ovarian activity

Ortega, Román Maza; Paulino, Mário Fonseca; Detmann, Edênio; Rennó, Luciana Navajás; Moreno, Deilen Sotelo; Márquez, David Contreras; Almeida, Daniel Mageste de; Melo, Luciano Prímola de; Moura, Felipe Henrique de

doi:10.1007/s11250-019-02095-7

Cited by 5 publications

(3 citation statements)

References 15 publications

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“…Therefore, an imbalance between protein and carbohydrate sources may decrease nitrogen use efficiency and limit animal performance (Detmann et al, 2014b). The results obtained in this study are similar to the reported by Batista et al (2016), Ortega et al (2020) and Franco et al (2021) who supplemented grazing beef heifer with protein and/or energy supplement in tropical conditions.…”

Section: Resultssupporting

confidence: 87%

Nutritional and productive performance of grazing system beef heifers receiving multiple supplementation in the dry season

Ortega

Moreno

Paulino

2022

Semina: Ciênc. Agrár.

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This research was conducted to evaluate the effects of supplementation multiple on intake, digestibility, and microbial protein synthesis and, productive performance of grazing system receiving multiple supplementation in the dry season. Twelve Nellore heifers (averaging 214.6 ± 7.3 kg initial BW and 8.0 ± 0.10 months) were distributed to a completely randomized design in two treatments: unsupplemented (only mineral) and; supplemented (1 kg per animal day-1 of multiple supplement). Only the crude protein (CP) intake was increased by supplementation (P < 0.05). In addition, the supplementation increased the digestibility of organic matter (OM), CP, ether extract (EE), non-fibrous carbohydrates (NFC) and dietary content of digested OM (DOM) (P < 0.05). The supplementation decreased microbial nitrogen to ingested nitrogen ratio (MICNR) (P < 0.05) and increased the serum urea nitrogen (SUN) concentration and urinary nitrogen excretion (UNE) (P < 0.05) in the animals. Finally, average daily gain (ADG) and final BW (FBW) were not affected by supplementation (P > 0.05). In summary, the provision 1 kg per animal day-1 of multiple supplement for beef heifers in grazing system does not improve productive performance in dry season when there is adequate qualitative and quantitative availability of forage mass. However, provision of supplement increases the total nutrients digestibility and nitrogen statuses in the animals.

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Section: Resultssupporting

confidence: 87%

Nutritional and productive performance of grazing system beef heifers receiving multiple supplementation in the dry season

Ortega

Moreno

Paulino

2022

Semina: Ciênc. Agrár.

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“…As mentioned above, lambs that grazed for a shorter time and received more concentrated supplementation had higher DM digestibility and greater absorption of nutrients from the gut, which resulted in higher slaughter performance, especially carcass weight and backfat thickness. Studies have generally established that the supplementation of grazing animals with concentrates containing protein, energy or a protein–energy combination promotes DM digestibility, forage use efficiency and even weight-related carcass traits due to a better balance between energy and nitrogen [ 26 , 27 ]. On the other hand, the study by Zhang et al [ 6 ] demonstrated that lambs that grazed for 2 or 4 h showed a remarkable decrease in extra energy expenditure through a significant reduction in their grazing activity; this, in turn, increased their available energy and resulted in a positive energy balance, thereby improving animal production.…”

Section: Discussionmentioning

confidence: 99%

Shorter Grazing Time and Supplementation Are Beneficial for Gastrointestinal Tract Development and Carcass Traits of Growing Lambs

Jin

Asad

Zhang

et al. 2022

Animals

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The effects of restricted grazing durations on the gastrointestinal development and carcass quality of growing lambs are poorly understood. In this study, 32 lambs were randomly assigned to four groups (n = 8, body weight = 21.86 kg) corresponding to 2, 4, 8 and 12 h of grazing per day. When off-pasture, all lambs were housed and fed concentrate and hay. When the grazing time decreased from 12 h to 2 h, the abomasum weight and large intestine length decreased (p = 0.019; p = 0.069). Compared to lambs grazed for 12 h, animals grazed for 2–4 h had a greater villus height and villus-to-crypt ratio in the duodenum, jejunum and ileum segments (p < 0.05); the 2 h lambs had superior carcass quality and a smaller diameter and area of the gluteus medium muscle fibers (p < 0.05), with no significant change after 4 h of grazing. The results indicated that shorter grazing times and supplementation were beneficial for the gastrointestinal tract development and carcass quality of growing lambs. Therefore, a better grazing management approach in Inner Mongolia could be to restrict the grazing of lambs to 4 h per day instead of grazing for more extended periods.

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“…Esto demuestra que no hubo deficiencia de compuestos nitrogenados para el crecimiento de microorganismos fibrolíticos, lo que puede explicar la digestibilidad de FDNcp similar entre los tratamientos (Tabla 4). Resultados similares fueron reportados por otros autores al suplementar bovinos en condiciones tropicales con diferentes tipos y cantidades de suplementos (9,22,23,24).…”

Section: Discussionunclassified

Supplementation of grazing heifers with different protein sources

et al. 2021

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Objective. Evaluate the effects of supplementation with different protein sources (soybean meal and wheat bran with urea) on the productive performance, intake, digestibility, microbial protein synthesis, and metabolic profile of grazing beef heifers. Materials and methods. Were used twenty Nellore heifers at 8.5±0.06 months of age, with an initial average body weight of 241.5±4.71 kg. The animals were distributed in a completely randomized deseing with two treatments and ten replicates. Two protein sources in the supplements were evaluated: 1) Soybean meal (SBM), and 2) Soybean meal + Wheat bran + Urea (SBM+WB+U). Results. Crude protein (CP) and organic matter intakes were higher (p<0.05) for heifers from SBM compared with SBM+WB+U. The CP digestibility was increased (p<0.05) with SBM supplementation. Mean blood concentrations of glucose, cholesterol, serum urea nitrogen, and total proteins were not affected (p>0.10) by protein sources. In the same way, daily weight gain and final body weight were not influenced (p>0.10) by protein sources. Conclusions. The supplementation with soybean meal or wheat bran with urea in association with soybean meal in multiple supplements for grazing cattle provides similar productive and nutritional performance and metabolic profile in beef heifers.

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Nutritional strategies for heifers under grazing system: productive and nutritional performance, metabolic profile and ovarian activity

Cited by 5 publications

References 15 publications

Nutritional and productive performance of grazing system beef heifers receiving multiple supplementation in the dry season

Nutritional and productive performance of grazing system beef heifers receiving multiple supplementation in the dry season

Shorter Grazing Time and Supplementation Are Beneficial for Gastrointestinal Tract Development and Carcass Traits of Growing Lambs

Supplementation of grazing heifers with different protein sources

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