Effect of Creep Feeding Bull Calves on Dam Most Probable Producing Ability Values

Abstract The greatest effects of nutrition on bull fertility occur by providing a relatively high plane of nutrition during calfhood when the seminiferous epithelium of the testes is developing. A high plane of nutrition from 5 to 25 weeks of age results in greater circulating gonadotropin concentrations, greater testicular volume, and greater sperm production at maturity. At this age, diet can be manipulated by creep feeding bull calves with both protein and energy supplements which could accelerate puberty and increase sperm production. Increased rate of gain in bull calves post-weaning can accelerate puberty a few weeks, but excess post-weaning gain and fat buildup in the neck of the scrotum can have detrimental effects on fertility. Considerable emphasis has been placed on specific micronutrient (especially minerals) effects on peripubertal bull fertility. Trace mineral supplementation is believed to be critical for optimal fertility and both copper (Cu) and zinc (Zn) supplementation have influenced male fertility in other species. However, there are no guidelines for recommended levels of these minerals to ensure fertility. Providing organic or complexed compared to inorganic mineral to peripubertal bulls have increased liver concentrations of mineral and in some cases, have accelerated puberty, but enhanced fertility-associated measures have not been realized. Because both Cu and Zn are present in the ejaculate, mineral needs during the breeding season may differ from the off-season. During the breeding season, bulls can lose 10 to 20% of their weight and need to re-gain this weight before the next breeding season. Divergent planes of nutrition provided to mature bulls during the off-season revealed enhanced sperm energy and stress-fighting potential with decreasing plane of nutrition. Specific mineral supplementation during the off-season in mature bulls provides no beneficial effect on fertility-associated measures. In summary, significant effects of nutrition post-weaning on bull fertility-associated measures have not been realized.

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INFLUENCE OF HIGH-PROTEIN FEED ADDITIVE ON THE PRODUCTIVITY OF THE MEAT BULL-CALVES

Adaptive Fodder Production ◽

10.33814/afp-2222-5366-2019-3-6-11 ◽

2019 ◽

Vol 2019 (3) ◽

pp. 6-11

Author(s):

Батырхан Абилов ◽

Batyrkhan Abilov ◽

Лариса Пашкова ◽

Larisa Pashkova

Keyword(s):

Hematological Parameters ◽

Physiological State ◽

Average Daily Gain ◽

Live Weight ◽

Feed Additive ◽

North Caucasus ◽

Agricultural Enterprise ◽

Bull Calves ◽

Economic Indices ◽

High Level

The article presents the data obtained as a result of carrying by employees of the Research Institute of sheep and goat breeding, a branch of the FSBSI "North Caucasus FARC", the scientific and economic experience to study the efficiency of a new fodder additive "Organic" on the productive and physiological indices of bull-calves during the completion of growing in the conditions of the farm "Pata" agricultural enterprise in the Karachay-Cherkessia Republic. The statement of the experience and all researches were carried out according to generally accepted methods. In the course of the experiment, the following indices were studied: the chemical compound of forages, the dynamics of a live weight gain in the experimental stock, hematological parameters, control slaughter data, economic indices. Completed researches have shown positive result from the use of the fodder additive "Organic" in bull-calves diets: an increase in the average daily gain of live weight by 25%, a slaughter yield by 1% and a high level of profitability – 27%. Thus, the additional introduction of "Organic" in a diet of young horned cattle in the 2nd experimental group promoted more intensive metabolism, stabilization of a physiological state, increase in productivity and, as a consequence, profitability of beef production. Researches in this direction reveal the latent fodder reserves promoting increase in the productivity of agricultural animals.

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30 The Effect of Creep Feed Composition and Form on Pre- and Post-weaning Growth Performance of Pigs and the Utilization of Low-quality Nursery Diets

Journal of Animal Science ◽

10.1093/jas/skab054.038 ◽

2021 ◽

Vol 99 (Supplement_1) ◽

pp. 21-22

Author(s):

Brenda Christensen ◽

Lee-Anne Huber

Keyword(s):

Growth Performance ◽

Milk Replacer ◽

Creep Feeding ◽

Feed Composition ◽

Creep Feed ◽

Three Phase ◽

Feeding Program ◽

Main Protein ◽

Liquid Milk ◽

Feeding Regimen

Abstract Fifty-six litters standardized to 12 piglets from first-parity sows were used to determine the effects of creep and nursery diet compositions on pre- and post-weaning pig growth performance. At three days of age, litters (initial BW 2.31±0.61kg) were assigned to one of four creep feeding regimens (n=14): [1] commercial creep feed (COM), [2] liquid milk replacer (LMR), [3] pelleted milk replacer (PMR), or [4] no creep feed (NO); creep feeds contained 1.0% brilliant blue as a fecal marker. Fecal swabs were collected every 3±1 days to identify piglets that regularly consumed creep feed. At weaning (18±1 days of age), six pigs per litter that consumed creep feed were placed on either a HIGH- (contained highly digestible animal proteins) or LOW- (contained corn and soybean meal as the main protein sources) quality nursery diet (n = 7) in a three-phase feeding program over 38 days. The LMR disappeared at the greatest rate (37.7 g/pig/d; DM-basis) versus COM and PMR (10.8±1.5 g/pig/d; P < 0.001). Litters that received LMR had the greatest proportion of pigs with blue fecal swabs between study days 4 and 15 (85.0 vs 59.0±0.4%; P < 0.05) and LMR piglets had greater BW at weaning versus all other treatments (6.32, 6.02, 5.92, 5.67±0.14 kg, for LMR, COM, NO, and PMR, respectively; P < 0.001). Over the entire nursery period, pigs that received LOW diets had reduced ADG (399 vs 485±42 g; P < 0.001), ADFI (520 vs 595±37 g; P< 0.001), G:F (0.77 vs 0.82±0.03; P < 0.01), and BW at the end of the nursery period (21.2 vs 24.4±1.6 kg; P < 0.001), with no carryover effects of creep feeding regimen. Providing supplemental nutrition during the suckling period via LMR improved pig body weight at weaning, but did not improve post-weaning growth performance, regardless of nursery diet quality.

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The Proliferation of Germ Cells in the Testes of Bull Calves and Young Bulls

Acta Veterinaria Scandinavica ◽

10.1186/bf03547329 ◽

1961 ◽

Vol 2 (1) ◽

pp. 22-31

Author(s):

M. Abdel-Raouf

Keyword(s):

Germ Cells ◽

Bull Calves

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Effects of creep feeding and its interactions with other factors on the performance of meat goat kids and dams when managed on pasture

Translational Animal Science ◽

10.1093/tas/txz122 ◽

2019 ◽

Vol 3 (4) ◽

pp. 1466-1474

Author(s):

Emily G Hayes ◽

Raquel V Lourençon ◽

Richard Browning

Keyword(s):

Growth Traits ◽

Survival Rates ◽

Influential Factors ◽

Daily Weight Gain ◽

Litter Type ◽

Financial Returns ◽

Creep Feeding ◽

Creep Feed ◽

Important Interaction ◽

Meat Goat

Abstract Creep feeding and its possible interactions with other influential factors (genetics, litter type, and sex) for weaning traits were studied in meat goat kids and their dams. Kids across 3 yr were creep fed (254 kids; 5 pens) or not creep fed (255 kids; 5 pens) from 30 to 90 d of age. Creep-fed kids had higher (P ≤ 0.05) preweaning average daily weight gain and weaning weights (113.1 ± 13.0 g/d; 15.0 ± 0.8 kg) than kids not creep fed (99.8 ± 13.1 g/d; 14.0 ± 0.8 kg). However, financial returns were not higher (P > 0.05) for creep-fed kids compared with kids not creep fed. There was no difference (P > 0.05) in kid conformation score or survival rates between the treatment groups. The only important interaction among kid traits was treatment × litter type (P < 0.05) for FAMACHA scores. Within noncreep pens, single kids had lower (better; P < 0.05) FAMACHA scores (2.9 ± 0.3) than twin kids (3.9 ± 0.3). There was no litter-type effect on FAMACHA scores for kids within the creep feed pens. Dams of the creep-fed (n = 175) and noncreep (n = 178) kids were also evaluated. Treatment did not affect (P > 0.05) litter weights, dam weight change, gross revenue for weaned litters, or fecal egg counts. Treatment interacted with litter type (P < 0.05) to effect packed cell volume (PCV). In the noncreep group, dams raising singles had higher (better; P < 0.05) PCV (18.7 ± 1.3%) than dams rearing twin kids (15.7 ± 1.3%). The litter-type effect on dam PCV was not evident (P > 0.05) in the creep-fed group. Creep feeding improved some kid growth traits but did not improve dam traits or financial returns. Interactions of creep treatment with other factors were minimal for doe-kid traits.

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A note on the performance and management of calves reared on cold acidified milk replacer fed ad libitum

Animal Science ◽

10.1017/s0003356100040058 ◽

1983 ◽

Vol 36 (1) ◽

pp. 147-150 ◽

Cited By ~ 8

Author(s):

W. S. Thickett ◽

N. H. Cuthbert ◽

T. D. A. Brigstocke ◽

M. A. Lindeman ◽

P. N. Wilson

Keyword(s):

Milk Powder ◽

Skim Milk ◽

Live Weight ◽

Skim Milk Powder ◽

Barley Straw ◽

Milk Replacer ◽

Bull Calves ◽

The Mean ◽

Ad Libitum ◽

Dry Food

ABSTRACTResults are presented from six trials dealing with aspects of management on the cold ad libitum system of calf rearing using an acidified milk replacer containing over 600 g skim milk powder per kg.Thirty-six calves were housed in pens of six for each trial and were fed through a teat and pipeline from a storage barrel. Acidified milk replacer, pH 5·6, was mixed cold at 125 g/1 and made available ad libitum to 3 weeks. A rationed allowance was given daily, on a reducing scale, over the following 2 weeks with weaning completed at 35 days. A pelleted dry food containing 180 g crude protein per kg, together with water in buckets and barley straw in racks, was available ad libitum throughout. Each trial lasted 8 weeks. Results for the mean of the six cold ad libitum trials involving 216 calves were compared with the mean results of 10 conventional bucket-fed trials carried out separately at the same unit, involving 912 calves. All calves were purchased British Friesian male (bull) calves.Calves on the ad libitum system showed improved live-weight gains of 9·4 kg at 3 weeks, 8·8 kg at 5 weeks and 7·5 kg at 8 weeks, compared with the conventional system. The consumption of milk replacer powder was higher in ad libitum trials at 29·4 kg cf. 12·5 kg by bucket but intake of pelleted dry feed was lower on the ad libitum system at 50·7 kg cf. 71·3 kg to 8 weeks. Calf appearance scores were significantly improved on the ad libitum system which gave the main improvement in performance in the first 3 weeks.

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