Variações diárias nas excreções de creatinina e derivados de purinas em novilhos

Leal, Thalita Lázaro; Valadares, Rilene Ferreira Diniz; Filho, Sebastião de Campos Valadares; Leão, Maria Ignêz; Detmann, Edênio; Barbosa, Analívia Martins; Chizzotti, Antônio; Paixão, Mônica Lopes

doi:10.1590/s1516-35982007000400020

Cited by 10 publications

(9 citation statements)

References 15 publications

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“…In the present study, the proportion of allantoin in relation to total purines was 94.05%. Leal et al (2007) and Rennó et al (2002) observed that the mean value of this proportion in cattle was 92.2 and 91.7%, respectively, which corroborates the results obtained in this study. Oliveira (2008) has commented that CBM supplemented with calcium oxide influences the greater availability of essential nutrients and higher efficiency in their use by ruminal microbiota, which was not observed in this study.…”

Section: Ruminal Microbial Nitrogenous Compounds Estimated From Urinasupporting

confidence: 92%

“…The mean creatinine excretion value observed by Rennó et al (2000) in 4 experiments with cattle weighing approximately 238 kg of BW reported mean values of 27.36 mg kg − 1 BW. In another study conducted by Leal et al (2007) using cattle with approximately 445 kg of BW, found urinary creatinine excretion of 25.47 mg kg − 1 BW. Chizzotti (2004), using Holstein heifers, developed an equation to estimate daily urinary creatinine excretion (CE) in relation to BW, where CE (mg kg − 1 BW) = 32.27 − 0.01093 BW.…”

Section: Ruminal Microbial Nitrogenous Compounds Estimated From Urinamentioning

confidence: 96%

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Castor bean meal for cattle finishing: 1—Nutritional parameters

et al. 2011

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This study was carried out to evaluate the effects of replacing soybean meal (SM) with castor bean meal supplemented (CBT) or not (CBNT) with calcium oxide on the intake, total, ruminal and intestinal apparent digestibility of dietary contituents, ruminal pH, and nitrogen ammonia concentration (NH 3 -N), ruminal degradation parameters, and on the ruminal microbial protein synthesis based on urinary purine derivatives excretion or purine bases in the abomasum. Were used 5 Bos indicus crossbreed castrated male cattle were used with average initial body weight of 360 ± 30 kg, fistulated in the rumen and the abomasum, in a 5 × 5 Latin square experimental design. The duration of each experimental period was 14 d, with 8 d of adaptation and 6 d of sampling. The 5 treatments consisted of 4 levels of replacement of SM with CBT (0, 33, 67 and 100% on the DM basis) and one treatment with 100% replacement of SM with CBNT. The diet consisted of 35 and 65% of concentrate and corn silage on the DM basis, respectively. It was verified that DM digestibility was reduced (P b 0.05) by alkaline treatment of the castor bean meal. With the exception to ruminal apparent digestibility of crude protein (RDCP), there was no effect of calcium oxide (P N 0.05) on the digestibility of other constituents. We observed an increase in RDCP of 24.2% (P b 0.05) for the CBNT treatment compared to the CBT. The intestinal digestibility of the dietary constituents was not affected by the percentage of SM replaced with CBT. However, alkaline treatment of the CBNT decreased (P b 0.05) the intestinal apparent digestibility of ether extract. There was no interaction (P N 0.05) between treatment and time for ruminal pH; however, ruminal pH was influenced (P b 0.05) by collection time, with a minimum value of 6.23 estimated at 5.8 h after food delivery. However there was an interaction (P b 0.05) between treatment and collection time for NH 3 -N concentration. There were no observed differences (P N 0.05) in excretion of nitrogenous compounds in the urine among the different castor bean meal treatments. The N-RNA to total microbial N ratio was not affected by the percentage of CBT, presenting an average of 0.138. No differences were detected (P N 0.05) between the two methods used to estimate the ruminal microbial protein synthesis. We conclude that castor bean meal supplemented with 60 g kg − 1 of calcium oxide can fully replace soybean meal in crossbreed finishing cattle diets.

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Section: Ruminal Microbial Nitrogenous Compounds Estimated From Urinasupporting

confidence: 92%

Section: Ruminal Microbial Nitrogenous Compounds Estimated From Urinamentioning

confidence: 96%

Castor bean meal for cattle finishing: 1—Nutritional parameters

et al. 2011

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“…The mean ALA:PD ratio was 0.983 g/g, which is close to the value reported by Leal et al (2007) of 0.922. According to Verbic (1990), excretion of allantoine may represent 0.850g/g of the total purine derivatives.…”

Section: Resultssupporting

confidence: 86%

Intake and performance of feedlot cattle fed diets based on high and low Brix sugar cane with or without calcium oxide and corn silage

Magalhães¹,

Filho²,

Menezes³

et al. 2012

R. Bras. Zootec.

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-The objective of this study was to evaluate low and high Brix diets, treated or not with 5 g of calcium oxide per kg of natural matter, and corn silage on intake, digestibility and performance of beef cattle. Forty cattle with initial body weight (BW) of 350 kg were used: five composed the control group, 30 were distributed into random blocks (control) and the other five were distributed in a 5 × 5 incomplete Latin square, with the objective of determining digestibility. The 30 animals evaluated for performance were slaughtered and empty body weight (EPW), carcass dressing and meat cuts were determined.The diet with corn silage (CS) presented the best intake of the other ingredients and the best weight gain, except for neutral detergent fiber intake in g/kg of BW. Only carcass dressing, in relation to BW and EBW, was not affected by the treatments, and the others were greater for animals fed diets with sugar cane silage. Animals fed diets with high brix sugar cane silage and treated high brix sugar cane silage presented lower intake of indigestible neutral detergent fiber and neutral detergent fiber corrected for ash and protein (g/kg of BW) in relation to diets with low and high brix sugar cane silage, respectively. Animals fed diets with corn silage presented higher digestibility, except for crude protein and non-fibrous carbohydrates. Animals subjected to diets with corn silage presented low excretion of nitrogen compounds and higher microbial crude protein synthesis.Animals fed sugar cane silage present greater intake, performance and digestibility. The use of lime during 15 or 20 o Brix sugar cane ensilage does not alter intake, digestibility or performance of beef cattle.

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“…Microbial production was lower than the 130 g CP kg TDN −1 reported by NRC (1996) and120 g 130 g CP kg TDN −1 by Leal et al (2007).…”

Section: Resultscontrasting

confidence: 57%

Feeding behavior, microbial efficiency, and nitrogen balance of Nellore heifers supplemented with crude glycerin

Silva

et al. 2016

SCA

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This study aimed to evaluate the inclusion of crude glycerin in diets for Nellore heifers grazing on a Brachiaria brizantha pasture, during the dry season, on urine and plasma urea concentrations, feeding behavior, and microbial protein synthesis. Sixty Nellore heifers with an average initial weight of 285.89 ± 18.74 kg, at approximately 19 ± 2 months of age, were distributed, in a completely randomized design, into the following five treatments with twelve replicates: 0.00, 4.00, 8.00, 12.00,and 16.00% inclusion of crude glycerin in the diet they were fed. Grazing time decreased linearly (P<0.05) by 7.44 min with every percent of crude glycerin included in the diet. Microbial efficiency was not affected (P>0.05), averaging 113.73g CP per kg TDN ingested. Plasma nitrogen concentration did not show any effects (P>0.05), averaging 13.11 mg dL −1 . Supplementing heifers during the dry season, at 0.7% BW, using up to 16% crude glycerin in the diet composition, did not elicit positive responses from feeding behavior and had little influence on microbial synthesis. Key words: Efficiency. Glycerol. Grazing. Rumination. ResumoObjetivou-se avaliar a inclusão de glicerina bruta na dieta de novilhas Nelore em pastejo de Brachiaria brizantha no período da seca, sobre as concentrações de ureia na urina e no plasma, o comportamento ingestivo e a sínteses de proteína microbiana. Foram utilizadas 60 novilhas da raça Nelore, com peso médio inicial 285,89 ± 18,74 kg e aproximadamente 19 ± 2 meses de idade, distribuídas em um delineamento inteiramente casualizado, sobre 5 tratamentos e 12 repetições: 0,00; 4,00; 8,00; 12,00 e 16,00% de inclusão de glicerina bruta na dieta das novilhas. O tempo de pastejo apresentou efeito linear decrescente (P<0,05), para cada porcentagem de glicerina bruta inclusa na dieta, foi observada uma redução de 7,44 minutos. A eficiência microbiana não apresentou efeito (P>0,05), com valor médio de 113,73g de PB por kg de NDT ingerido. A concentração de nitrogênio no plasma não apresentou efeito (P>0,05), tendo assim, valor médio de 13,11mg dl -¹. A suplementação de novilhas no período seco com 0,7% PC com utilização da glicerina bruta na composição da dieta até 16,00% não proporcionou

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Variações diárias nas excreções de creatinina e derivados de purinas em novilhos

Cited by 10 publications

References 15 publications

Castor bean meal for cattle finishing: 1—Nutritional parameters

Castor bean meal for cattle finishing: 1—Nutritional parameters

Intake and performance of feedlot cattle fed diets based on high and low Brix sugar cane with or without calcium oxide and corn silage

Feeding behavior, microbial efficiency, and nitrogen balance of Nellore heifers supplemented with crude glycerin

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