Dietary Phosphorus Requirement of Holstein Steers During Early Growing Period

López, Jorge; Gómez, Martín Francisco Montaño; Plascencia, A.; Salinas-Chavira, J.; Zinn, R. A.

doi:10.1080/09712119.2007.9706643

Cited by 1 publication

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“…After the carcasses were chilled for 48 h the following measurements were obtained: 1) LM area, taken by direct grid reading of the longissimus muscle at the 12th rib; 2) subcutaneous fat over the LM at the 12th rib taken a t a location 3/4 the lateral length from the chine bone end; 3) kidney, pelvic and heart fat (KPH) as a percentage of carcass weight and 4) marbling score (USDA, 1965). Estimated NE of diets were calculated based on animal performance by the equation described previously by Lopez et al (2007): Pens were used as experimental units. The trial was analyzed as a randomized complete block design experiment (Cochran and Cox, 1955).…”

Section: Methodsmentioning

confidence: 99%

Effects of Dietary Calcium Levels on Growth-performance and Digestive Function in Cattle Fed a High-fat Finishing Diet

Plascencia¹,

Alvarez²,

Montaño³

et al. 2009

Journal of Applied Animal Research

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Plascencia, A., Alvarez, E.G., Montaiio, M., Salinas-Chavira, J. and Zinn, R.A. 2009. Effects of dietary calcium levels on growth-performance and digestive function in cattle fed a high-fat finishing diet. J . Appl. Anim. Res., 36: 179-184.A growth performance and digestion trial was conducted to evaluate the influence of dietary calcium level on the feeding value of a high-fat (11%) finishing diet. Treatments consisled of three levels of dietaiy Ca: 0.50, 0.70 and 0.90% (DM basis). Ca source was limestone and yellow grease was included as supplemental fat. There were no treatment effects (P>0.20) on DMI. Increasing dietary Ca level enhanced ADG (PO.lO) on total tract digestion of OM, ADF, lipid, starch or N. However, increasing Ca level from 0.7 to 0.9% decreased ruminal digestion of OM (P<0.05), ADF (P0.20) either ruminal p H or ruminal soluble Ca. I t is concluded that dietary Ca levels greater th.an 0.7% (LIMB) are necessary to achieve optimal performance of feedlot steers fed a high,-fat fin,ish.ing diet.

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Section: Methodsmentioning

confidence: 99%