Effects of added dietary urea on the utilization of maize stover silage by growing beef cattle

Adamu, Ali Moses; Russell, James R.; McGilliard, A.D.; Trenkle, Allen

doi:10.1016/0377-8401(89)90064-3

Cited by 6 publications

(2 citation statements)

References 13 publications

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“…The value of 8% CP that was estimated for adult doelings in this study aligns with values obtained in other studies reported for beef cattle [38] and goats [41]. Adamu et al (1989) [42] observed that, in animals fed corn stover silage-based diets and supplemented with a protein concentrate containing various urea levels, the maximum microbial growth, measured through bacterial nitrogen reaching the duodenum, occurred when rumen ammonia levels reached 4.9 mg/dL. For animals fed four times a day, the optimum ammonia level to maximize dry matter intake and digestibility was approximately 13.3 mg/dL.…”

Section: Discussionsupporting

confidence: 91%

Nitrogen Utilization in Goats Consuming Buffelgrass Hay and Molasses-Based Blocks with Incremental Urea Levels

Torres-Cavazos,

Rico-Costilla,

Moreno-Degollado

et al. 2023

Animals

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The use of goats for meat production faces challenges from environmental and nutritional factors. Urea is an affordable non-protein nitrogen source commonly utilized in ruminant nutrition. The objective of this study was to investigate nitrogen utilization in goats fed low-quality hay supplemented with molasses blocks containing urea. Twenty Anglo-Nubian doelings were individually housed in metabolic cages and provided with chopped Buffelgrass (Cenchrus ciliaris) hay ad libitum. Goats were randomly assigned to four urea levels (0, 2, 4, and 6%; n = 5 per treatment) in molasses blocks for a duration of 30 days. A negative nitrogen balance (−2.458 g/day) was observed in doelings consuming blocks without urea, compared with a positive balance (0.895 g/d) for those consuming the 6% urea blocks. Block nitrogen intake significantly increased with urea level, but urea supplementation did not affect dry matter (DM) or neutral detergent fiber (NDFom) intake or digestibility. A minimum crude protein (CP) requirement of 8% for maintenance in doelings consuming low-quality forage with a urea-based supplement was determined through regression analysis between CP intake (% of DM) and N balance (r2 = 0.479; p < 0.002). The value of 8% of CP obtained in this study is similar to several previous studies reported in the literature, but in this case, the increments in CP came exclusively from urea. In this study, increasing the urea content of molasses blocks up to 6% significantly increased nitrogen intake, retention, and balance in goats. These results contribute to a better understanding of nitrogen utilization in goats fed low-quality hay with urea supplementation.

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Section: Discussionsupporting

confidence: 91%

Nitrogen Utilization in Goats Consuming Buffelgrass Hay and Molasses-Based Blocks with Incremental Urea Levels

Torres-Cavazos,

Rico-Costilla,

Moreno-Degollado

et al. 2023

Animals

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“…Approximately, 2 L of rumen fluid was simultaneously collected from each animal during rumen fluid collection hours to isolate ruminal bacteria. Collected rumen fluids were composited for each animal/each period in glass jars to isolate rumen microbes using the differential centrifugation technique as described by Adamu et al (1989) for microbial purine analysis and stored at -20 °C until analysis (Zinn and Owens, 1986). Oven dried samples of hays, orts, feces, and duodenum were ground to pass through a 1mm screen and then, analyzed for dry matter (DM), ash, organic matter, crude protein (AOAC, 1990), neutral detergent fibers (NDF) and acid detergent fiber (ADF) using ANKOM® fiber analyzer according to the method of Van Soest and Robertson (1985).…”

Section: Methodsmentioning

confidence: 99%

Comparison of microbial protein synthesis and nutrient digestibility of Medicago sativa and Prangos pabularia hay in sheep

Güney

Erdoğan

Demirel

2017

IJAR

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The aim of this study was to compare feed intake, nutrients digestibility, protein fractions entering into the duodenum, and ruminal fermentation parameters of sheep fed Medicago sativa (alfalfa) and Prangos pabularia, locally called kerkol hays. In the study three ruminally and duodenally cannulated Morkaraman sheep were used. It was carried out as two periods within a 2x3 crossover experimental design. Daily intake of crude protein (CP) was higher (P less than 0.05) in sheep fed alfalfa than those fed kerkol hay. Digestibility of NDF and ADF were lower (P less than 0.05) in sheep fed alfalfa hay than those fed kerkol hay (P less than 0.05). The percentage of protein escaping ruminal degradation was higher (P less than 0.05) in sheep fed kerkol hay (30.73%) than those fed alfalfa hay (15.05%). Ruminal fermentation parameters were similar between groups, except ruminal NH3-N concentration. It is concluded that kerkol hay can be used as forage for sheep feeding.

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Effect of dietary inclusion of hazelnut and soybean meals on microbial protein synthesis

Karsli

Tasal

Nursoy

2006

Small Ruminant Research

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Effects of added dietary urea on the utilization of maize stover silage by growing beef cattle

Cited by 6 publications

References 13 publications

Nitrogen Utilization in Goats Consuming Buffelgrass Hay and Molasses-Based Blocks with Incremental Urea Levels

Nitrogen Utilization in Goats Consuming Buffelgrass Hay and Molasses-Based Blocks with Incremental Urea Levels

Comparison of microbial protein synthesis and nutrient digestibility of Medicago sativa and Prangos pabularia hay in sheep

Effect of dietary inclusion of hazelnut and soybean meals on microbial protein synthesis

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