scholarly journals RESPONSE TO NONPROTEIN NITROGEN AND SULFUR SOURCES BY THE EARLY-WEANED CALF

1976 ◽  
Vol 56 (3) ◽  
pp. 567-572 ◽  
Author(s):  
K. A. WINTER
Keyword(s):  
Total Protein ◽  
Sodium Sulfate ◽  
Elemental Sulfur ◽  
Nitrogen Sources ◽  
Animal Performance ◽  
Reverse Effect ◽  
Improve Performance ◽  
Nonprotein Nitrogen ◽  
Holstein Bull ◽  
Bull Calves

Sixty Holstein bull calves were used in two experiments to evaluate two nonprotein nitrogen sources and several sulfur sources in calf starter rations. Experiment 1 compared urea and biuret, with and without sulfur (S), methionine hydroxy analog (MHA), and S plus MHA; experiment 2 compared the effect of elemental sulfur and sodium sulfate added to a urea-supplemented starter on calf response to these feeds. Performance of calves on the biuret-supplemented starters was significantly reduced as compared with urea-supplemented starters. The addition of sulfur or MHA to the NPN-supplemented starters did not affect animal performance significantly. However, sulfur did tend to improve performance of the urea-fed calves and had the reverse effect when biuret was fed, while MHA tended to depress performance when urea was fed. In the second experiment, the addition of either sulfur or sodium sulfate to the urea-supplemented started did not significantly improve animal performance, even when 40% of the total protein in the diets was supplied by nonprotein nitrogen sources. The urea-supplemented starter rations were found to have N:S ratios before sulfur supplementation of 11.4:1 (experiment 1) and 9.4:1 (experiment 2), which are close to the ratios considered optimum for ruminants.

RESPONSE TO WEANING AT TWO TO FIVE WEEKS OF AGE BY THE YOUNG DAIRY CALF

1978 ◽  
Vol 58 (3) ◽  
pp. 377-383 ◽  
Author(s):  
K. A. WINTER
Keyword(s):  
Feed Intake ◽  
Animal Performance ◽  
Dairy Calf ◽  
Healthy Male ◽  
Holstein Bull ◽  
Bull Calves ◽  
Whole Milk ◽  
Weight Gains ◽  
Holstein Calves

In two experiments Ayrshire and Holstein bull calves were weaned off whole milk onto dry feed at various ages, ranging from 14 to 35 days, to determine the earliest age at which calves may be weaned successfully. Ayrshire calves were weaned at 14, 21 and 35 days with no significant differences in weight gains or feed intake to 15 wk of age. Holstein calves were weaned off whole milk or fermented colostrum at 17, 21, 24, 28 and 35 days of age with no significant differences in weight gains and feed intake to 12 wk of age. Also, the feeding of either fresh whole milk or fermented colostrum did not sigificantly affect animal performance. Several calves weaned at less than 21 days, in each experiment, refused to eat dry feed. Post-weaning deaths of several calves weaned at 21 days were attributed to prolonged pre-weaning scours or illness at time of weaning. It was concluded that healthy male calves may be weaned successfully at 21 days of age but weaning should be delayed for calves afflicted with scours or other illness. Agressive eaters may be weaned as early as 14 days of age but some calves weaned at less than 21 days of age may encounter problems in adapting to dry feed.

scholarly journals Effects of processing maize grains and soyabean on rumen fermentation and development of Holstein bull calves

2007 ◽  
Vol 16 (Suppl. 2) ◽  
pp. 525-530
Author(s):  
Y. Zhang ◽  
X. Deng ◽  
Z. Zhou ◽  
L. Ren ◽  
Q. Meng
Keyword(s):  
Rumen Fermentation ◽  
Holstein Bull ◽  
Bull Calves

scholarly journals Age-related changes in the secretion of LH in vivo and in vitro in infantile and prepubertal Holstein bull calves

Reproduction ◽  
1994 ◽  
Vol 101 (2) ◽  
pp. 453-458 ◽  
Author(s):  
J. M. McAndrews ◽  
J. L. Peters ◽  
D. R. Deaver
Keyword(s):  
Holstein Bull ◽  
Age Related ◽  
Bull Calves ◽  
Age Related Changes

FISH SILAGE AS A PROTEIN SOURCE FOR EARLY WEANED CALVES

1980 ◽  
Vol 60 (3) ◽  
pp. 787-789 ◽  
Author(s):  
K. A. WINTER ◽  
A. HAMID JAVED
Keyword(s):  
Formic Acid ◽  
Soybean Meal ◽  
Protein Source ◽  
Feed Consumption ◽  
Low Protein ◽  
Holstein Bull ◽  
Bull Calves ◽  
Weight Gains ◽  
Dietary Treatments

Fish silage, preserved with 3.5% formic acid, was fed to Holstein bull calves weaned onto dry feed at 3 wk of age. Dietary treatments were: (1) soybean meal-supplemented calf starter, (2) a low protein grain mix combined with fish silage in a 2:1 ratio (wt/wt), and (3) the same grain mix combined with fish silage in a 4:3 ratio (wt/wt). Initial acceptance of the fish silage diets equalled that of the soybean meal diet. Over the 10-wk period, feed consumption, weight gains, and feed:gain ratio tended to be slightly poorer as the proportion of fish silage in the diet increased. Only during the final 6 wk of the trial were weight gains significantly reduced by calves on the fish silage diets. It was concluded that fish silage can be used as a protein source for young calves.

Sign in / Sign up

Export Citation Format

Share Document