&lt;b&gt;Microbial protein synthesis and nitrogen metabolism in cows bred on tropical pasture and fed on cassava root and corn

Silva, Ádler Carvalho da; Figueiredo, Mauro Pereira de; Bonomo, Paulo; Pereira, Mara Lúcia Albuquerque; Luz, Yann dos Santos; Santos, Edileuza de Jesus

doi:10.4025/actascianimsci.v36i2.22161

Cited by 3 publications

(5 citation statements)

References 11 publications

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“…Animal Sciences, v. 40, e42556, 2018 There was no effect (p > 0.05) of treatments on serum urea nitrogen (SUN) and milk urea nitrogen (MUN), as well as on non-esterified fatty acids (Table 2). According to the literature, the level of serum urea nitrogen cannot exceed 13-15 mg dL -1 , as it would cause loss of proteins in the form of urine urea, commonly associated with excess degradable protein or lack of fermentable carbohydrate in the rumen (Chizzotti et al, 2007;Silva et al, 2014). In the present study, values varied between 13.3 and 14.3 mg dL -1 (Table 2), within the range considered desirable, and without treatment effect.…”

Section: Resultsmentioning

confidence: 52%

<b>Nitrogen compounds balance and microbial protein synthesis in supplemented crossbred dairy cows in pasture

Gutierrez

Lana

Teixeira

et al. 2018

Acta Sci. Anim. Sci.

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The objective this work was to evaluate the supplementation of cows on Brachiaria decumbens pasture during the rainy-dry transition. Eight 1/2 Holstein/Zebu cows (497 ± 50 kg) were distributed in two 4 x 4 Latin squares, with 2 x 2 factorial treatments (100% mineral salt versus nitrogen salt containing 25:25:50% urea: corn: mineral salt, and 1.5 versus 3.0 kg d-1 concentrate per cow). The experiment lasted 56 days, divided into four periods of 14 days, the last seven days for data collection. No interaction effect (p > 0.05) was detected between the supplement and the different levels of concentrate for any of the evaluated variables. No effect (p > 0.05) of supplement or concentrate level was observed on urinary excretions of purine derivatives, microbial nitrogen compounds and microbial efficiency. Nitrogen salt increased (p < 0.05) nitrogen intake and increased urinary nitrogen excretion, leading to a reduced nitrogen balance, while the higher concentrate level increased (p < 0.05) nitrogen intake and the total amount of nitrogen excreted in milk. Therefore, it is recommended, for crossbred cows in the rainy-dry transition period, the supply of 1.5 kg d-1 concentrate during milking, using only mineral salt instead of nitrogen salt at will on pasture.

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Section: Resultsmentioning

confidence: 52%

<b>Nitrogen compounds balance and microbial protein synthesis in supplemented crossbred dairy cows in pasture

Gutierrez

Lana

Teixeira

et al. 2018

Acta Sci. Anim. Sci.

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“…Em todas as dietas experimentais não houve balanço de N negativo (Quadro 3), demonstrando que os requerimentos proteicos dos animais foram atendidos. Silva et al (2014), ao contrário deste estudo, não verificaram alteração no balanço de nitrogênio, ao incluir raiz de mandioca seca e triturada em até 72% no concentrado de vacas leiteiras mantidas em pastagem, apresentando mé-dia de 219 g/dia. Kljak et al (2017) avaliando diferentes proporções de forragem e concentrado com dietas a base de silagem de sorgo, também não verificaram influencia sobre o balanço de N de novilhas.…”

Section: Discussionunclassified

“…Os maiores valores de excreção de N obtidos por Mendonça et al (2004) podem ser justificados pelo maior consumo de N total (383g/dia), em comparação ao atual estudo (150g/dia). Silva et al (2014) também encontraram valores de excreção de nitrogênio pela urina (81,04g/dia) e pelas fezes (97,20g/dia) numericamente superiores aos obtidos neste estudo (Quadro 3); o consumo médio de nitrogênio encontrado por Silva et al (2014) foi de 505,23g/dia. Entretanto, Conti et al (2014) não encontraram diferenças significativas nas excreções de N pelas fezes, nem pela urina, quando vacas leiteiras, alimentadas com cana-de-açúcar, consumiram maiores quantidades de N (482 x 429g/dia).…”

Section: Discussionunclassified

“…Silva et al (2014) não obtiveram diferenças significativas para o N-ureico na urina e no plasma, ao adicionar até 72% de raiz de mandioca seca e triturada no concentrado para vacas em lactação mantidas em pastagens tropical. Oliveira et al (2007) obtiveram médias de 13,03mg/dL para N-ureico no plasma de vacas em lactação alimentadas com 40% de cana-de-açúcar e 60% de concentrado.…”

Section: Discussionunclassified

“…O balanço de compostos nitrogenados não foi influenciado significativamente quando o milho foi substituído pela raiz de mandioca seca e triturada (0, 25, 50 75 e 100%) no concentrado para vacas leiteiras (Silva et al 2014). Entretanto, estudos envolvendo a silagem da raiz de mandioca na alimentação de bovinos são escassos.…”

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Parâmetros ruminais e balanço de nitrogênio em bovinos alimentados com silagem da raiz de mandioca

Vieira

Azevêdo

Silva³

et al. 2017

Pesq. Vet. Bras.

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RESUMO.-Avaliou-se o efeito da inclusão da silagem da raiz de mandioca sobre os parâmetros ruminais e o balanço de compostos nitrogenados em bovinos de origem leiteira. Utilizou-se cinco animais, canulados no rúmen, não lactantes e com peso corporal médio de 389 kg. Os animais foram distribuídos em um quadrado latino cinco x cinco, sendo cinco dietas com níveis de inclusão (0,00; 3,62; 7,23; 10,84 The effect of inclusion of cassava root silage on ruminal parameters and nitrogenous compounds in dairy cattle was evaluated. Five cattle cannulated in the rumen and with average body weight of 389 kg were distributed into a Latin square 5x5, with five levels of inclusion (0.00, 3.62, 7.23, 10.84 and 14.54% of the diet dry matter) of cassava root silage and five periods (10 days for adaptation and five days for data collection). The nitrogen excretion in urine and feces were not affected (P>0.05) by inclusion of cassava root silage in the diet. The total nitrogen intake (CNT) and nitrogen balance (NB) showed an increasing quadratic and linear behavior, respectively. The lowest CNT (142.14g/day) was obtained with the inclusion of 5.82% silage cassava root. The concentration of urea (U) and urea nitrogen (UN) in plasma and urine did not change (P>0.05). There was a quadratic behavior (P<0.05) in excreta of U and NU in the urine, with minimum point of 131.13 and 61.20g/day respectively, at the level of 7.27% inclusion of the cassava root silage. No interaction (P>0.05) was between the levels of cassava root silage and the collection time of rumen contents for the short-chain fatty acids, pH and ammonia nitrogen (NH3-N). Only the N-NH 3 protein showed quadratic behavior, according to the inclusion levels, with the minimum point (12.62mg/100ml of rumen contents) at the level of 5.98%. The level of 7.23% of cassava root silage in the diet was more efficient with the use of nitrogen compounds. The diets contribute similarly to the production of short chain fatty acids, without disturbing the rumen pH.

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Consumption, digestibility and cattle condition according to forage composition and quality in maize-cattle from conservation-based agroecosystems

Ramírez-Iglesias¹,

Hernández²,

Bravo³

et al. 2020

AIMS Agriculture and Food

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<b>Microbial protein synthesis and nitrogen metabolism in cows bred on tropical pasture and fed on cassava root and corn

Cited by 3 publications

References 11 publications

<b>Nitrogen compounds balance and microbial protein synthesis in supplemented crossbred dairy cows in pasture

<b>Nitrogen compounds balance and microbial protein synthesis in supplemented crossbred dairy cows in pasture

Parâmetros ruminais e balanço de nitrogênio em bovinos alimentados com silagem da raiz de mandioca

Consumption, digestibility and cattle condition according to forage composition and quality in maize-cattle from conservation-based agroecosystems

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