Dietary Protein Degradability Effects on Plasma and Milk Urea Nitrogen and Milk Nonprotein Nitrogen In Holstein Cows

Roseler, D. K.; Ferguson, James D.; Sniffen, C.J.; Herrema, J.

doi:10.3168/jds.s0022-0302(93)77372-5

Cited by 311 publications

(269 citation statements)

References 16 publications

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“…In the 18 subjects that were 30 days in milk, MU and BU were correlated (r = 0.902) as shown by other studies in dairy cows [5,35,36] and buffalo cows [14]. Urea levels in milk and blood were influenced by CP intake and days in milk, while protein digestibility in the rumen did not influence both parameters.…”

Section: Discussionsupporting

confidence: 69%

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Influence of rumen protein degradability on productive and reproductive performance in buffalo cows

Campanile¹,

Palo²,

Infascelli³

et al. 2003

Reprod. Nutr. Dev.

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-The present study aimed to ascertain the influence of crude protein (CP) digestibility in the rumen on the quantity and quality of milk production and reproductive performance, blood (BU) and milk (MU) urea, haematological profile and vaginal mucus urea, ammonia and potassium of buffalo cows. Lactating buffaloes (n = 84), 60 days in milk, were randomly subdivided into Group C (control, n = 42) and Group T (fed a diet supplemented with Aspergillus oryzae, n = 42). In three fistulated buffalo, the diet supplemented with Aspergillus oryzae showed a decrease (P < 0.01) in protein digestibility in the rumen (79.3 vs. 45.9%). No differences were registered in productive performance. Nine buffaloes not in oestrus during the dietary treatment (Groups T1 and C1), 30 days in milk, were used to study the haematological profile and to determine milk urea and ammonia in the vaginal mucus. The animals in Group T1 had higher ammonia values in the blood (P < 0.01) but not in the vaginal mucus than Group C1. A relationship was found between MU and BU. MU was influenced by CP intake and dry matter intake. No differences between the treatments were observed in reproductive performance and the conception rate and calving interval were 37.9% and 41.4% (90 trial-day) and 449 and 419 days respectively in Groups T and C. Reproductive performance was not influenced by high levels of BU nor by blood ammonia levels, although the latter were higher in the group fed the diet supplemented with Aspergillus oryzae.buffalo cow / protein digestibility in the rumen / blood / milk / vaginal mucus

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Section: Discussionsupporting

confidence: 69%

“…Dietary proteins and their digestibility in the rumen affect blood (BU) and milk (MU) urea concentration [1][2][3][4][5]. Overfeeding proteins has been associated with a decline in fertility in most [6][7][8][9], but not all [10] studies.…”

Section: Introductionmentioning

confidence: 99%

Influence of rumen protein degradability on productive and reproductive performance in buffalo cows

Campanile¹,

Palo²,

Infascelli³

et al. 2003

Reprod. Nutr. Dev.

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“…Dietary CP levels below 8% for an extended period of time can adversely affect beef cow milk production (National Research Council 1996). Serum urea N (SUN) and milk urea N levels of dairy cows are used as indicators of the efficiency of protein and energy utilization (Roseler et al 1993). Therefore, the levels of SUN were examined in the grazing beef cows to deter- mine their nitrogen status under the different pasture treatments.…”

Section: Diet Qualitymentioning

confidence: 99%

Management strategies to improve cow-calf productivity on meadow bromegrass pastures

Kopp¹,

Wittenberg²,

McCaughey³

2004

Can. J. Anim. Sci.

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. 2004. Management strategies to improve cow-calf productivity on meadow bromegrass pastures. Can. J. Anim. Sci. 84: 529-535. A 4-yr experiment was conducted to determine the effects of fertilization, incorporation of a legume and use of the Rumensin ® -controlled release capsules (CRC) on productivity of cow-calf pairs grazing meadow bromegrass (Bromus biebersteinii Roem & Schult.). Four pasture treatments (T), alfalfa-grass fertilized (AF), alfalfa-grass unfertilized (AU), grass-only fertilized (GF) and grass-only unfertilized (GU), each replicated twice were compared. The eight 3.7-ha pastures were split into five equally sized paddocks and rotationally stocked with first-calf cows in 1995 and 1998, and with mature cows in 1996 and 1997. Half of the cows on each pasture received a Rumensin ® CRC 1 wk prior to the start of the pasture season. Cow DMI was not influenced by fertilization or incorporation of a legume. However, cows treated with monensin consumed less (2.3% BW) compared to the control cows (2.5% BW, P < 0.05). Incorporation of alfalfa and fertilization improved pasture quality and resulted in higher CP and lower NDF content in forage selected by the animals. Monensin improved (P < 0.05) cow average daily gain (ADG, kg d -1 ) when grazing unfertilized grass and alfalfa-grass pastures, but did not influence gains of cows on fertilized pastures. Fertilizer application, legume incorporation and monensin administration did not affect milk yield or milk composition. Despite differences in diet quality, calf ADG for AU, AF, and GF were similar. However, calf ADG was lower for GU pastures (P < 0.05), probably as a result of the high fibre and low protein content of this pasture treatment. Both incorporation of alfalfa and fertilization increased total calf gain (kg ha -1 ); the greatest improvement was associated with fertilization. There were, however, economic advantages to legume incorporation, as the cost of the additional gain for GF and AF pastures averaged $1.08 and $0.79 kg -1 ha -1 , and no extra costs were incurred for AU. ). Pour cela, ils ont comparé quatre traitements étudiés en double : la graminée et de la luzerne avec fertilisation (AF), la graminée et de la luzerne sans fertilisation (AU), la graminée avec fertilisation (GF) et la graminée sans fertilisation (GU). Les huit pâturages de 3,7 hectares ont été scindés en cinq enclos de superficie identique et on y a mis à l'herbe, en rotation, des vaches primipares (1995 et 1998) ou des vaches matures (1996 et 1997). La moitié des sujets de chaque enclos a reçu des capsules de Rumensin ® à libéra-tion lente une semaine avant que débute la paissance. La fertilisation et l'incorporation d'une légumineuse n'affectent pas l'ingestion de matière sèche par la vache. Toutefois, les animaux recevant du monensin mangent moins (2,3 % du poids corporel) que les vaches témoins (2,5 % du poids corporel, P < 0,05). L'incorporation de luzerne et la fertilisation améliorent la qualité du pâturage tout en augmentant la concentration de protéines brutes et en ...

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“…Non-protein nitrogen is composed of 30 to 50% of urea nitrogen, while the remaining is composed of creatinine, uric acid, amino acids, and ammonia, among others (Roseler et al, 1993;Broderick and Clayton, 1997).…”

Section: Introductionmentioning

confidence: 99%

Fourier Transform Infrared Spectroscopy (FTIR) for MUN analysis in normal and adulterated Milk

Oliveira

Silva

Bastos

et al. 2012

Arq. Bras. Med. Vet. Zootec.

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The objective of this study was to evaluate the CombiScope FTIR equipment based on Fourier Transform Infrared methodology (FTIR), to assess the content of milk urea nitrogen (MUN) in Brazil. Repeatability and reproducibility of CombiScope™ FTIR (Delta Instruments), and comparison with an enzymatic automated method (Chemspec® 150; Bentley Instruments) were tested to measure raw milk urea nitrogen (MUN). Additionally, MUN levels stability after storage of raw milk samples at 4°C, and 20°C for up to 15 days, and capability and precision to detect extraneous urea added as an adulterant to the milk were evaluated by FTIR equipment. There was a high correlation coefficient for the analysis of MUN by FTIR equipment, when compared with the automated enzymatic method, with no significant difference between both. MUN concentration in raw milk remained stable at temperatures of 4°C for up to 15 days of storage, but after 3 days of storage at 20°C there was an increase in the MUN levels. The CombiScope FTIR equipment proved to be a reliable method for analysis of MUN content in raw milk. However, results for MUN were not linear with the amount of extraneous urea added to raw milk, having a significant difference for samples when 40mg/dL of urea was added to milk.Keywords: milk, validation, milk urea nitrogen, infrared spectroscopy, FTIR Palavras-chave: leite, validação, nitrogênio uréico no leite, espectroscopia no infravermelho, FTIR RESUMO O objetivo deste estudo foi realizar a avaliação do CombiScope™ FTIR (Delta Instruments), um equipamento baseado na espectroscopia de infravermelho por metodologia em Transformada Fourier (FTIR) para a avaliação do teor de nitrogênio uréico no leite (NUL) cru produzido no

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Dietary Protein Degradability Effects on Plasma and Milk Urea Nitrogen and Milk Nonprotein Nitrogen In Holstein Cows

Cited by 311 publications

References 16 publications

Influence of rumen protein degradability on productive and reproductive performance in buffalo cows

Influence of rumen protein degradability on productive and reproductive performance in buffalo cows

Management strategies to improve cow-calf productivity on meadow bromegrass pastures

Fourier Transform Infrared Spectroscopy (FTIR) for MUN analysis in normal and adulterated Milk

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