Levels of supplementation for grazing pregnant beef cows during the dry season

Cabral, Carla Heloísa Avelino; Paulino, Mário Fonseca; Paula, Nelcino Francisco de; Valadares, Rilene Ferreira Diniz; Araújo, Fabiana Lana de

doi:10.1590/s1516-35982012001200009

Cited by 4 publications

(3 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Cabral et al [ 13 ] supplemented pregnant cows grazing pastures in similar conditions to the present study, but with different amounts of supplement per day, and observed a quadratic pattern in performance, with cows receiving 1.0 kg of supplement daily gaining more BW. The total amount of supplement provided for the 1.0 kg treatment in Cabral’s work (84 kg) was similar to the present study (90 kg).…”

Section: Discussionsupporting

confidence: 67%

Energetic-protein supplementation in the last 60 days of gestation improves performance of beef cows grazing tropical pastures

Silva

Paulino

Detmann

et al. 2017

J Animal Sci Biotechnol

Self Cite

View full text Add to dashboard Cite

BackgroundNutrition is one of the most important factors that affect animal performance, and it therefore also impacts on financial results in beef systems. In this way, finding the best strategy for feeding supplements is of paramount importance. Aiming to evaluate the effect of supplement feeding strategies for beef cows in the last third of gestation, two experiments were conducted. In Experiment 1, 35 pregnant Nellore cows were assigned to a completely randomized design with four treatments: control, which received no supplement; supplementation for the last 30 d of gestation (30-d; 3.0 kg/d); supplementation for the last 60 d of gestation (60-d; 1.5 kg/d); or supplementation for the last 90 d of gestation (90-d; 1.0 kg/d). All supplemented treatments received the same total amount of supplement throughout the experiment: 90 kg (20% of crude protein). A second experiment (Experiment 2) was delineated to evaluate the effects of the amounts offered in Experiment 1 on intake and metabolism. Four multiparous pregnant Nellore cows were assigned to a 4 × 4 Latin square design, with periods of 15 d each.ResultsThere was a linear effect of the number of days of supplementation on calving body weight (BW; P < 0.05) and a quadratic effect on BW change from parturition to d 31 post-calving (P < 0.05), with cows on the 60-d strategy losing less BW post-calving. No difference was found in offspring birth BW (P > 0.10). A significant linear effect on interval from parturition to conception (P < 0.05) was observed, with the highest calving to conception interval being observed in the 90-d strategy. The level of supplementation did not affect forage intake or neutral detergent fiber digestibility (P > 0.10). Nitrogen excreted through urine tended to increase linearly with the level of supplementation (P < 0.10).ConclusionProviding 1.5 kg of supplement during the last 60 d of gestation improves cow performance after calving, reducing the magnitude of BW lost, and reduces the number of days from calving to re-conception in the following breeding season compared to the usually recommended period of supplementation of 90 d pre-partum.

show abstract

Section: Discussionsupporting

confidence: 67%

Energetic-protein supplementation in the last 60 days of gestation improves performance of beef cows grazing tropical pastures

Silva

Paulino

Detmann

et al. 2017

J Animal Sci Biotechnol

Self Cite

View full text Add to dashboard Cite

show abstract

“…The DMP as an individual parameter is not a good parameter to characterize pastures, because it does not provide information on the nutritive value of available pastures (Cabral, Paulino, Paula, Valadares, & Araújo, ). Therefore, the pasture management based on the pdDMP supply would be a natural evolution of concepts, since it integrates quantity and nutritive value regardless of the time of year.…”

Section: Discussionmentioning

confidence: 99%

Internal markers for predicting dry matter intake and digestibility in Santa Inês ewes on a pasture

et al. 2018

View full text Add to dashboard Cite

Assessing feed intake is a valuable tool for herd management decisions. The use of markers is one of the most widely used techniques for estimating dry matter intake (DMI) in ruminants. Thus, internal markers (IM) were evaluated to predict DMI and digestibility (DMD) in ewes supplemented on a pasture during pre‐ (75, 105 and 135 days of gestation) and postpartum periods (30 and 60 days of lactation). The animals were kept on a pasture, and they were put into individual stalls to receive their supplementation. Twelve ewes were distributed in a completely randomized design: (a) Two supplementation levels (SL; 5 and 15 g/kg body weight, BW) and three IM (indigestible neutral detergent fiber, iNDF; indigestible acid detergent fiber, iADF; and rumen‐undegradable dry matter; RUDM) were used and analyzed as mixed models. (b) The DMI and DMD, which were estimated by the best marker, were analyzed as repeated measures using the mixed procedure in SAS. Fecal output was estimated using an external marker (LIPE®; isolated, purified and enriched lignin). The DMI and DMD estimated by RUDM were greater and better than iADF and iNDF, which were similar. The effects of SL and physiological stages for DMI and DMD were evaluated by the values obtained from RUDM. As expected, regardless of the physiological stage, DMI and DMD were greater in the animals that received 15 g/kg BW. Considering the physiological stage, the animals fed 15 g/kg BW had greater DMI and DMD at 75 days of gestation and 30 days of lactation and the least DMI was observed at 135 days of gestation and 60 days of lactation. In conclusion, RUDM provides the best estimates for DMI and DMD, which were greater in animals receiving 15 g/kg BW of concentrate at the beginning of gestation and lactation.

show abstract

“…In this situation, there is disagreement among some authors on the protein and energy levels that should be provided by the supplement to optimize the pasture use, since several works (Cabral, Paulino, Paula, Valadares, & Araújo, 2012;Cabral et al, 2014a;Cabral et al, 2014b) reported that increasing supplement supply without adequate protein and energy levels promotes an imbalance of nutrients and impairs animal performance.…”

Section: Introductionmentioning

confidence: 99%

Energy supplementation as strategy of pasture management

Santos

Cabral

et al. 2022

Acta Sci. Anim. Sci.

View full text Add to dashboard Cite

This study evaluated the effect of increased energy via supplementation on the performance, ingestive behavior, nutrient digestibility, and nitrogen metabolism of grazing heifers fed tropical forage in the rainy-dry transition season. Treatments consisted of mineral supplementation ad libitum (control) and multiple supplements formulated to provide different energy levels and the same amount of protein (300 g CP animal d-1) and were denominated as low (LE; 340 g TDN animal d-1), medium (ME; 780 g TDN animal d-1) and high (HE; 1220 g TDN animal d-1) energy. Animals supplemented with ME, and HE had a greater average daily gain in relation to the control treatment, with an increase of 41 and 46%, respectively. Greater values for total apparent digestibility of neutral detergent fiber were observed for the treatment HE. Lesser values of urinary urea N were observed for the control and HE treatments. Our results define the use of energy levels in the supplement as a tool for pasture management. If the purpose of the production system is to enhance forage intake, the option is to supply supplements with less energy levels. In contrast, if the purpose is to increase the stocking rate, supplements with greater energy levels should be used.

show abstract

Levels of supplementation for grazing pregnant beef cows during the dry season

Cited by 4 publications

References 19 publications

Energetic-protein supplementation in the last 60 days of gestation improves performance of beef cows grazing tropical pastures

Energetic-protein supplementation in the last 60 days of gestation improves performance of beef cows grazing tropical pastures

Internal markers for predicting dry matter intake and digestibility in Santa Inês ewes on a pasture

Energy supplementation as strategy of pasture management

Contact Info

Product

Resources

About