Influence of dietary forage level and forage coarseness of grind on growth performance and digestive function in feedlot steers.

Calderón-Cortés, J. F.; Zinn, R. A.

doi:10.2527/1996.74102310x

Cited by 31 publications

(26 citation statements)

References 17 publications

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“…Therefore, the animals were not weighed in a manner that would provide data to evaluate protein weight gain based on N retention. The significant improvement of N retention and digestibility was consistent with other previous trials (Calderon-Cortes and Zinn, 1996;Fimbres et al, 2002b). Fimbres et al (2002b) reported that N retained was positively related to dietary energy density and inversely related to dietary hay level.…”

Section: Discussionsupporting

confidence: 90%

“…However, Gorocica-Buenfil and Loerch (2005), reported that dietary rice straw did not influence apparent total-tract OM and NDF digestibility in steers when 13% maize silage was replaced by maize. Similarly, other previous studies (Zinn et al, 1994;Calderon-Cortes and Zinn, 1996) have demonstrated that replacing 8% Sudan grass with maize did not affect the ruminal disappearance of OM and NDF in steers. These results indicate that the effect of dietary rice straw on OM and NDF digestion in forestomach and post-digestive tract probably depends upon animal species.…”

Section: Discussionsupporting

confidence: 76%

“…Calderon-Cortes and Zinn (1996) also demonstrated that the duodenal flows of total N, NH 3 -N and microbial N were not affected by the replacement of Sudan grass from 16 to 8% with steam-flaked maize. Increase in true ruminal N digestion and decrease in non-bacteria N flow to the duodenum with reducing dietary rice straw levels is probably due to lower degradability of rice straw than maize in the rumen.…”

Section: Discussionmentioning

confidence: 84%

“…This seemed to be inconsistent with our results. However, Calderon-Cortes and Zinn (1996) also found that dietary Sudan grass level did not affect efficiency of microbial protein synthesis when replacing 8% Sudan grass with steam-flaked maize. Soto-Navarro et al (2006), assumed that efficiency of ruminal microbial protein synthesis could be kept relatively stable when the supply of easily fermentable carbohydrate was adequate to satisfy the maximal microbial growth in the rumen.…”

Section: Discussionmentioning

confidence: 95%

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Effect of rice straw in the diet for growing goats on site and extent of digestion and N balance

Zhao¹,

Jiang²,

Sun³

et al. 2007

J. Anim. Feed Sci.

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Effect of reducing dietary rice straw on N balance, site and extent of digestion, and efficiency of microbial protein synthesis were evaluated in this trial. Four Liuyang black goats (average body weight 19.3±2.1 kg), fitted with the ruminal, proximal duodenal and terminal ileal cannulas were used in a 4×4 Latin square design. Goats were assigned to four dietary treatments designed by increasing maize grain inclusion at the expense of rice straw: 1. 40% forage (20% maize stover and 20% rice straw, HR); 2. 35% forage (20% maize stover and 15% rice straw, MR1); 3. 30% forage (20% maize stover and 10% rice straw, MR2) and 4. 25% forage (20% maize stover and 5% rice straw, LR). Experimental diets were similar in chemical composition except for dietary NDF and metabolizable energy content. The amount of diet offered to each goat was restricted to 85% of its ad libitum intake to maintain no orts during the whole experimental period. There were no differences in DMI as a result of restricting intake. Totaltract digestibility of OM (P<0.01), N (P<0.01) and NDF (P<0.05) increased with reducing dietary rice straw. Retained N increased from 12.04% for HR to 21.62% for LR (P<0.01). Efficiency of microbial protein synthesis was not affected by dietary rice straw (P>0.05). When expressed as a percentage of N intake, ruminal N disappearance was not affected (P>0.05) by treatments. The true ruminal OM, apparent ruminal OM and ruminal NDF disappearance increased (P<0.01) with reducing dietary rice straw. There were no differences (P>0.05) in small intestinal digestibility of OM and N among the treatments. N BALANCE IN GOATS FED RICE STRAWOur data indicated that reducing dietary rice straw from 40 to 25% could improve utilization of nutrients by growing goats.

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Section: Discussionsupporting

confidence: 90%

Section: Discussionsupporting

confidence: 76%

Section: Discussionmentioning

confidence: 84%

Section: Discussionmentioning

confidence: 95%

See 2 more Smart Citations

Effect of rice straw in the diet for growing goats on site and extent of digestion and N balance

Zhao¹,

Jiang²,

Sun³

et al. 2007

J. Anim. Feed Sci.

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“…Similar responses in DMI between diets containing different levels of forage have been observed previously in trials involving steam-flaked corn-based diets (Zinn et al 1994;Calderon-Cortes and Zinn 1996). As the S:ADF ratio increased, the DMI, ADG, G:F and NE of diet increased (P ≤ 0.03) linearly.…”

Section: U and S:adf Ratio Effects On Growth Performance And Dietary supporting

confidence: 80%

Effects of a combining feed grade urea and a slow-release product on performance, dietary energetics and carcass characteristics of steers fed finishing diets

López-Soto

Aguilar-Hernández

Dávila-Ramos

et al. 2014

Journal of Applied Animal Research

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Recent findings have shown that microbial nitrogen flow and digestible energy of diet are increased when urea (U) is combined with a slow-release urea product (SRU) in diets with a starch:acid detergent fibre (S:ADF) ratio of 4.5, while feed grade U has shown greater effects on growth performance or dietary energy utilization when the diet contains a S: ADF ratio of greater than 5.0. These results can be partially explained by the better synchronization of ruminal degradation rates between those U sources with the carbohydrates of the diets. Therefore, 60 crossbreed steers (372.4 ± 15 kg) were used to evaluate the effects of combining U and SRU in a diet with a S:ADF ratio of 4.5 vs. U that was supplemented in diets with different S:ADF ratios (3.5, 4.5 and 5.5) on growth performance, dietary energetics and carcass characteristics. U combination did not affect average daily gain (ADG), but reduced dry matter intake [DMI, as % of body weight (BW)] enough to increase feed efficiency (G:F) and dietary net energy (NE). As the S:ADF ratio increased, the DMI, ADG, G:F and NE of diet increased linearly. Irrespective of the S:ADF ratio, U diets did not modify neither the observed-to-expected NE ratio nor the apparent retention per unit DMI, while U combination increased by 7.2% and 8.4%, respectively, the observed-to-expected dietary ratio and the apparent retention per unit DMI. U combination had no effect on carcass characteristics. As the S:ADF ratio increased, carcass weight and LM area were increased linearly. Combining feed grade U and SRU in diets with a 4.5 starch:fibre ratio resulted in positive effects on the efficiency of utilization of dietary energetics.

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Effects of wet corn gluten feed and yellow grease on digestive function of cattle fed steam-flaked corn-based finishing diets

Conway

Hallford

Soto-Navarro

2012

Animal Feed Science and Technology

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Influence of dietary forage level and forage coarseness of grind on growth performance and digestive function in feedlot steers.

Cited by 31 publications

References 17 publications

Effect of rice straw in the diet for growing goats on site and extent of digestion and N balance

Effect of rice straw in the diet for growing goats on site and extent of digestion and N balance

Effects of a combining feed grade urea and a slow-release product on performance, dietary energetics and carcass characteristics of steers fed finishing diets

Effects of wet corn gluten feed and yellow grease on digestive function of cattle fed steam-flaked corn-based finishing diets

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