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פותח על ידי קלירמאש פתרונות בע"מ -
Effect of diet energy concentration and of age of Holstein-Friesian bull calves on growth rate, urea space and fat deposition, and ruminal volume.
Year:
1995
Source of publication :
Journal of Animal Science
Authors :
אהרוני, יואב
;
.
ברוש, אריה
;
.
הולצר, צבי
;
.
Volume :
73
Co-Authors:
Brosh, A., Agricultural Research Organization, Newe Ya'ar Research Center, Haifa, Israel.
Aharoni, Y., Agricultural Research Organization, Newe Ya'ar Research Center, Haifa, Israel.
Levy, D., Agricultural Research Organization, Newe Ya'ar Research Center, Haifa, Israel.
Holzer, Z., Agricultural Research Organization, Newe Ya'ar Research Center, Haifa, Israel.
Facilitators :
From page:
1666
To page:
1673
(
Total pages:
8
)
Abstract:
Holstein-Friesian bull calves were fed diets of three metabolizable energy concentrations: 11.7, 10.9, and 10.0 MJ/kg of DM, and the same content of CP, 145 g/kg. Two trials were carried out. Initial weights were 195 and 180 kg and final weights were 490 and 600 kg for Trials 1 and 2, respectively. The live weight gains (kg/d) were .93, 1.06, and 1.16 in Trial 1 and .98, 1.11, and 1.16 in Trial 2 on the low-, medium-, and high-energy diet, respectively. In Trial 2, measurements were made of ruminal fluid volume and urea space, which expresses the protein mass in the body. Ruminal fluid volume of young calves was high, exceeding 250 mL/kg live weight. Proportional to live weight, it tends to decrease from the age of 213 d to slaughter. It was higher on the lower-energy diet (P < .01). Rate of fat deposition between 250 and 600 kg body weight did not increase even on the diet with 11.7 MJ/kg, although these calves were fatter (P < .05) at slaughter than those on the low-energy diets. The ratios of depot fats (g of fat/kg of hot carcass) in both trials were close for each energy level, in spite of a 100-kg difference in live weight at slaughter. It was 24.0, 29.8, and 40.7 for calves fed low-, medium-, and high-energy diets, respectively, in Trial 1 and 27.7, 37.1, and 40.4, respectively, in Trial 2.(ABSTRACT TRUNCATED AT 250 WORDS)
Note:
Related Files :
aging
Animal
breeding
cattle
Growth, Development and Aging
Histology
Lipids
Male
metabolism
Rumen
standard
עוד תגיות
תוכן קשור
More details
DOI :
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
24131
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:05
Scientific Publication
Effect of diet energy concentration and of age of Holstein-Friesian bull calves on growth rate, urea space and fat deposition, and ruminal volume.
73
Brosh, A., Agricultural Research Organization, Newe Ya'ar Research Center, Haifa, Israel.
Aharoni, Y., Agricultural Research Organization, Newe Ya'ar Research Center, Haifa, Israel.
Levy, D., Agricultural Research Organization, Newe Ya'ar Research Center, Haifa, Israel.
Holzer, Z., Agricultural Research Organization, Newe Ya'ar Research Center, Haifa, Israel.
Effect of diet energy concentration and of age of Holstein-Friesian bull calves on growth rate, urea space and fat deposition, and ruminal volume.
Holstein-Friesian bull calves were fed diets of three metabolizable energy concentrations: 11.7, 10.9, and 10.0 MJ/kg of DM, and the same content of CP, 145 g/kg. Two trials were carried out. Initial weights were 195 and 180 kg and final weights were 490 and 600 kg for Trials 1 and 2, respectively. The live weight gains (kg/d) were .93, 1.06, and 1.16 in Trial 1 and .98, 1.11, and 1.16 in Trial 2 on the low-, medium-, and high-energy diet, respectively. In Trial 2, measurements were made of ruminal fluid volume and urea space, which expresses the protein mass in the body. Ruminal fluid volume of young calves was high, exceeding 250 mL/kg live weight. Proportional to live weight, it tends to decrease from the age of 213 d to slaughter. It was higher on the lower-energy diet (P < .01). Rate of fat deposition between 250 and 600 kg body weight did not increase even on the diet with 11.7 MJ/kg, although these calves were fatter (P < .05) at slaughter than those on the low-energy diets. The ratios of depot fats (g of fat/kg of hot carcass) in both trials were close for each energy level, in spite of a 100-kg difference in live weight at slaughter. It was 24.0, 29.8, and 40.7 for calves fed low-, medium-, and high-energy diets, respectively, in Trial 1 and 27.7, 37.1, and 40.4, respectively, in Trial 2.(ABSTRACT TRUNCATED AT 250 WORDS)
Scientific Publication
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