Effect of the substitution of urea for soybean meal on digestion in steers

Kozloski, Gilberto Vilmar; Filho, Henrique Mendonça Nunes Ribeiro; Rocha, Jefferson Bomfim

doi:10.4141/a00-032

Cited by 9 publications

(6 citation statements)

References 32 publications

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“…However, results in relation to post-ruminal N digestion have been inconsistent. In some reports, increasing urea in diets increased post-ruminal nitrogen digestibility (Zinn et al 1994, Kozloski et al 2000; in others, as in the present experiment, increasing urea levels in the diet had no effect on post-ruminal N compounds digestion (Zinn et al 2003. The difference on post-ruminal N digestion between reports is mainly due to the method of substitution of protein ingredients by urea.…”

Section: Discussionsupporting

confidence: 40%

Site and extent of digestion of nitrogen compounds and organic matter in steers fed a finishing diet with dried distillers grains plus solubles supplemented with urea

Urías-Estrada

Ramos-Méndez

González-Vizcarra

et al. 2019

Austral j. vet. sci.

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Four Holstein steers (266 ± 13 kg) with ruminal and duodenal cannulae were used to evaluate the effect of inclusion of different levels of urea (0%, 0.4%, 0.8% and 1.2%) in a steam-flaked, corn-based finishing diet containing dried distillers grains plus solubles (DDGS) on the site and extent of N compounds and organic matter (OM) digestion, and on the ruminal N-NH3 and blood concentrations of urea nitrogen. Increasing the urea levels linearly decreased the OM flow to the duodenum (P<0.04) and increased the total N and non-ammoniacal N flow to the duodenum (P<0.01), which resulted from linear increases in the flow of microbial N and NH 3 -N (P<0.01) without affecting the feed residual N flow (P≥0.47). Increasing the urea levels linearly increased ruminal digestion of OM and dietary N (P≤0.03), and decreased protein efficiency (P<0.01) without affecting microbial efficiency. The urea supplementation did not affect post-ruminal digestion. Urea supplementation linearly increased (P<0.01) total tract digestion of N compounds without affecting total tract digestion of OM. Ruminal pH averaged 6.09 ± 0.03 and was not affected (P≥0.97) by the inclusion of urea. Ruminal NH 3 -N concentration increased with urea supplementation (linear component, P<0.01). The same effect was observed for blood urea concentrations and plasma urea (P<0.01). On the basis of the results observed here, urea can be incorporated in finishing corn-based diets that include DDGS. However, this must done carefully to avoid exceeding the RDP concentration in the diets in order to optimise ruminal fermentation and reduce the risk of high N excretion in the faeces. This is relevant when higher levels of DDGS are included in the diets (i.e. 30%).

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Section: Discussionsupporting

confidence: 40%

Site and extent of digestion of nitrogen compounds and organic matter in steers fed a finishing diet with dried distillers grains plus solubles supplemented with urea

Urías-Estrada

Ramos-Méndez

González-Vizcarra

et al. 2019

Austral j. vet. sci.

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“…Each heifer received 10 g/day of chromium oxide mixed with concentrate for 10 days (from day 32 until day 41) with posterior feces collection on the last 5 days (from day 38 until day 42). The fecal production was calculated dividing chromium concentration (mg/kg) corrected by the mean recovery rate of 90.6% [22] in the feces by the amount supplied in the feed. DMI was calculated by dividing the fecal production by (1– in vitro digestibility of dry matter of the diet) [20, 23].…”

Section: Methodsmentioning

confidence: 99%

OreganoExtract Added into the Diet of Dairy Heifers Changes Feeding Behavior and Concentrate Intake

Kolling

Panazzolo

Gabbi

et al. 2016

The Scientific World Journal

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This experiment aimed to describe the effects of Oregano extract (OE) inclusion into the concentrate fed to dairy heifers on physiological parameters, feeding behavior, intake, and performance. Thirty-two Holstein heifers were randomly distributed into four treatments: C = control, without addition of OE; OE2.5 = 2.5 g; OE5.0 = 5.0 g and OE7.5 = 7.5 g of Oregano extract per heifer/day. Feeding behavior and concentrate intake were assessed individually every day and total dry matter intake (DMI) was determined on the last week of the trial. Compared to control group, OE7.5 reduced by 32% the latency time to approach the feed bunk but increased by 6% the time spent eating the concentrate. Each inclusion of 2.5 grams of OE into the concentrate increased the occurrence of postingestive licking the feed bunk with abundant saliva production 1.2 times (P < 0.01) and tended to increase the occurrence of sneeze events 1.2 times (P < 0.10). No statistical difference was detected between treatments for total DMI, but concentrate DMI was 9% lower for OE7.5 when compared to control and OE2.5. The inclusion of 7.5 grams/day of OE causes small but negative effects in feeding behavior and concentrate intake, without change on total dry matter intake.

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“…Selain itu tingginya N-NH 3 pada jerami padi amoniasi (JPA) karena mengandung NPN yang tinggi akibat penambahan urea dan semua NPN didegradasi oleh enzim urease dalam rumen menjadi NH 3 dan CO 2 serta tersedianya karbohidrat fermentable. (Kozloski, et al, 2000) menyatakan bahwa peningkatan konsentrasi N-NH 3 rumen juga dipengaruhi oleh peningkatan pemberian urea. Hal ini sejalan dengan penelitian Puastuti, (2010) bahwa dengan pemberian jerami padi ditambah urea, molasses dan bungkil kedelai dapat meningkatkan konsentrasi N-NH 3 pada rumen kerbau namun pada penelitian Purba, (2009) konsentrasi N-NH 3 pada imbangan pemberian jerami amoniasi sebesar 42,5% dan onggok basah 23,5% yang diberikan sapi hanya menghasilkan N-NH 3 sebesar 7,82 mM.…”

Section: Konsentrasi N-nh 3 Dan Sintesis Protein Mikrobaunclassified

Peningkatan Kualitas Jerami Padi dan Pengaruhnya Terhadap Kecernaan Nutrien dan Produk Fermentasi Rumen Kerbau dengan Feces Sebagai Sumber Inokulum

Syapura¹,

Bata²,

Pratama³

2013

J. Agripet

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This study was aimed to determine the effect of feeding ammoniated rice straw plus concentrate on buffalo nutrient digestibility and rumen fermentation products by in vitro. The Research was carried out by using experimental method, designed according to completely randomized design (CRD). The source of inoculum was obtain from different feces of three buffalos kept in Datar Village of Purwokerto region fed rice straw, rice straw plus concentrate and rice straw ammoniated plus concentrate with dry matter ratio of 80 : 20. The treatments tested consisted of three treatments, namely R0 = control feed using rice straw; R1 = the use of rice straw plus concentrate with a ratio of (DM basis) 80:20; R2 = the use of ammoniated rice straw plus concentrate with a ratio of (DM basis) 80:20. The treatments were repeated 7 times, so there were 21 experimental units. The Variables measured included total VFA, Ratio A/P, N-NH 3, Microbial Protein Synthesis (MPS), Dry Matter and Organic Matter Digestibility. The result of this study showed that the treatment had an effect significant (P<0.05) on the concentration of VFA, Ratio A/P, N-NH 3 , Microbial Protein Synthesis (MPS), and Dry Matter and Organic Matter Digestibility. The HSD test showed that the highest production of VFA,Ratio A/P, N-NH 3 , Microbial Protein Synthesis (MPS), Dry Matter and Organic Matter Digestibility were achieved at R2 followed by R1 and R0 respectively. The conclusion is that the ammoniated rice straw supplemented with concentrate can be recommended to be fed to buffalo.

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Effect of the substitution of urea for soybean meal on digestion in steers

Cited by 9 publications

References 32 publications

Site and extent of digestion of nitrogen compounds and organic matter in steers fed a finishing diet with dried distillers grains plus solubles supplemented with urea

Site and extent of digestion of nitrogen compounds and organic matter in steers fed a finishing diet with dried distillers grains plus solubles supplemented with urea

OreganoExtract Added into the Diet of Dairy Heifers Changes Feeding Behavior and Concentrate Intake

Peningkatan Kualitas Jerami Padi dan Pengaruhnya Terhadap Kecernaan Nutrien dan Produk Fermentasi Rumen Kerbau dengan Feces Sebagai Sumber Inokulum

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