Growth parameters of Holstein-Friesland heifers reared on complete diets containing different roughages
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منابع مشابه
Insulin Sensitivity of Heifers on Different Diets
The hyperinsulinemic euglycemic clamp technique was used to investigate the effect on insulin sensitivity of 2 different diets used in practical cattle feeding in calves. Ten 4 to 5-month-old heifer calves were allocated to 2 feeding groups, LO or HI, to obtain growth rates of 400 g/day or 900 g/day. The heifers were fed and housed individually for 5 weeks. Growth rates close to calculated rate...
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One hundred prisoner cichlid fish, (2.5 g), were fed with levels 1, 2 and 3 grams of prebiotic inulin per kg of diet over a period of 60 days. The highest weight gained in treatment 3 g of inulin, which was not significantly different from treatment 2 g of prebiotic dietary (P>0.05). The highest specific growth rate was measured in 2 and 3 g inulin. The highest feed conversion ratio and the h...
متن کاملGrowth of Holstein dairy heifers in the United States.
Data were collected on the heart girth (n = 8,565; a measure of body weight) and height at withers (n = 8,568) of Holstein dairy heifers from 659 dairy farms as part of the National Dairy Heifer Evaluation Project during 1991 and 1992. Means and standard deviations for weight and height were determined for ages .5 to 23.5 mo. Third-order polynomial regression equations were derived to study the...
متن کاملStudies on pig diets containing different amounts of linoleic acid.
Since the deficiency syndrome caused by lack of essential fatty acids (EFA) was first described by Burr & Burr (1929) many species besides rats have been shown to require EFA, but evidence about the pig is rather sparse and conflicting. Ellis & Isbell (1926) and Ellis & Zeller (1930) reared pigs on diets containing only 0 . 5 7 ~ 'ether extract', but observed none of the classical signs of EFA ...
متن کاملPerformance of Holstein Calves, Heifers and First-Lactating Cows Fed Starter Diets with Different Protein Levels and Types of Soybean Meal
Holstein calves were fed pelleted starter diets with crude protein (CP) concentrations of 18%, 22% and 24% per dry matter (DM) containing soybean meal (SBM) (SBM18, SBM20 and SBM24), respectively, for 10 weeks from 14 days of age. Another diet with a CP concentration of 18% per DM was tested using commercial xylose-soybean meal (XSB; Yasminomax) instead of SBM. Each diet was fed to 24 calves an...
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ژورنال
عنوان ژورنال: South African Journal of Animal Science
سال: 2000
ISSN: 2221-4062,0375-1589
DOI: 10.4314/sajas.v30i2.3860