The growth and carcass quality of bacon pigs reared to different weights at 56 days old

1962 ◽  
Vol 4 (1) ◽  
pp. 13-24 ◽  
Author(s):  
T. G. Boaz ◽  
F. W. H. Elsley
Keyword(s):  
Weight Gain ◽  
Live Weight ◽  
Carcass Quality ◽  
Weaned Pigs ◽  
Live Weight Gain ◽  
Rate Of Growth ◽  
Feed Utilisation

Two experiments are described to investigate the effect of different weights of pigs at 56 days of age on live-weight gain, efficiency of feed utilisation and bacon carcass quality.1. In Experiment I a comparison was made between 32 pairs of weaners, reared on the sow, which weighed 31·0 1b. and 45·4 1b. respectively at 56 days of age. After separation into heavy and light groups the pigs were group fed to bacon weight.The heavy weaners reached 200 1b. eighteen days earlier than the light weaners but this difference was due completely to the slower rate of growth to 50 1b. live-weight. The heavy weaners required 3·59 1b. of meal per 1b. live-weight gain from 56 days of age to bacon weight compared with 3·50 1b. for the light weaners but there was no difference in efficiency of feed utilisation during the period taken to grow from 50 to 200 1b. There were no significant differences between the carcasses apart from an increased flare weight in the light weaners.2. In the second experiment both suckled and early-weaned pigs were reared to 30, 40 and 50 1b. at 56 days of age and then fed individually to 200 1b.The number of days taken to reach 200 1b. was 168·6 for the 50 1b. pigs, 176·6 for the 40 1b. pigs and 182·1 for the 30 1b. pigs; there were no differences due to the methods of rearing. The efficiency of feed utilisation from 56 days to 200 1b. was not affected by method of rearing but as weight increased from 30 to 50 1b. at 56 days, the meal required for a pound of subsequent live-weight gain increased from 3·06 to 3·24 1b.The number of days to increase from 50 to 200 1b. live-weight was 110·4 for the 50 1b. pigs, 109·3 for the 40 1b. and 106·3 for the 30 1b. pigs, again there being no differences due to the methods of rearing. There were no differences in efficiency of feed utilisation from 50 to 200 1b.Neither weight at 56 days nor method of rearing markedly affected the quality of the carcass but there was an indication that 56-day weight caused greater differences in the early-weaned treatments than in the suckled treatments.

The value of Australian sorghum for fattening pigs

1950 ◽  
Vol 40 (1-2) ◽  
pp. 84-92 ◽  
Author(s):  
R. Braude ◽  
K. G. Mitchell ◽  
K. L. Robinson
Keyword(s):  
Weight Gain ◽  
Fish Meal ◽  
Live Weight ◽  
First Grade ◽  
Carcass Quality ◽  
Food Utilization ◽  
Live Weight Gain ◽  
Maize Meal ◽  
Fattening Pigs

1. At two centres, Hillsborough and Shinfield, forty-eight pigs in four groups were fattened on rations containing Australian sorghum. The control ration consisted of 30%, wheatfeed, 30% barley meal, 30% maize meal and 10% fish meal. In the three experimental rations either barley meal or maize meal or both were replaced by sorghum.2. The rations containing 30% of sorghum proved to be equal to the control ration as far as live-weight gain of the pigs and the efficiency with which they utilized food was concerned. When 60% of the ration consisted of sorghum there were indications that both rate of gain and food utilization suffered.3. Some aspects of carcass quality suffered when either sorghum alone or sorghum plus maize formed 60% of the ration. The quality of the control carcasses, although quite good by present-day standards, would not qualify for first grade when commercial grading is re-introduced.4. Bacon produced on rations containing up to 60% sorghum had no off-taste or unpleasant flavour.5. In general, the value of sorghum in the ration of fattening pigs was found to be about equal to that of maize.

A note on goitre in lambs grazing rape (Brassica napus)

1967 ◽  
Vol 9 (1) ◽  
pp. 131-133 ◽  
Author(s):  
A. J. F. Russel
Keyword(s):  
Weight Gain ◽  
Brassica Napus ◽  
Neonatal Mortality ◽  
Live Weight ◽  
Carcass Quality ◽  
Forage Crops ◽  
Live Weight Gain ◽  
Thyroid Glands ◽  
Lamb Growth

Forage crops of the genus Brassica are known to contain goitrogens which under certain conditions can cause severe incidences of neonatal mortality in lambs and goitre in older sheep (Shand, 1952; Sinclair and Andrews, 1958, 1959, 1961; Andrews and Sinclair, 1962).In the course of studies of certain aspects of lamb growth it was noted that lambs grazing rape (Brassica napus) had heavier thyroid glands than comparable lambs grazing grass. Pipes, Premachandra and Turner (1958) found that a degree of hypothyroidism increased the rate of fattening and influenced the carcass quality of cattle, and in view of this and other evidence it was decided to test the hypothesis that changes in the weight of the thyroid glands of lambs grazing rape were associated with changes in the rate of live-weight gain.

Using Suffolk sheep for improving lamb production from sub-tropical Egyptian sheep:2. Lamb and fattening performance

1978 ◽  
Vol 90 (1) ◽  
pp. 131-137 ◽  
Author(s):  
A. S. El-Shobokshy ◽  
A. M. Aboul-Naga
Keyword(s):  
Body Weight ◽  
Weight Gain ◽  
Birth Weight ◽  
Live Weight ◽  
Carcass Quality ◽  
Live Weight Gain ◽  
Fattening Performance ◽  
Body Weights ◽  
Better Than

SUMMARYLamb and fattening performance and carcass quality of Suffolk x local Ossimi cross-bred lambs are discussed. 1369 cross-bred lamb records over the period from 1957 to 1970 were available for the study. The lambs of 50–59% Suffolk were the best cross-bred group with an advantage of 7–7, 14–2 and 17–1% over the native Ossimi lambs in birth weight, 120-day and yearling body weights, respectively. Generally, lamb performance declined as the Suffolk breeding was increased. However, breed groups variation was not statistically significant, except for birth weight.Seventy-one weaned male lambs, 4 months of age, from three breed groups: 70–90% Suffolk, 35–45% Suffolk and local Ossimi, were fattened for 16 weeks using two levels of feeding. The two Suffolk cross-bred groups gained slightly more body weight than the local Ossimi. After 8 weeks of fattening, the 35–45% Suffolk lambs gained significantly more weight than the local lambs. However, the local lambs were more efficient in converting food to live-weight gain.The carcass quality of the Suffolk cross-bred lambs was better than the local lambs, and the advantage was greater for the high Suffolk breeding group.

Single cereal diets for bacon pigs: 2. The effect of methods of storage and preparation of barley on performance and carcass quality

1970 ◽  
Vol 12 (1) ◽  
pp. 1-6 ◽  
Author(s):  
D. J. A. Cole ◽  
G. W. Dean ◽  
J. R. Luscombe
Keyword(s):  
Weight Gain ◽  
Propionic Acid ◽  
Dry Matter ◽  
Live Weight ◽  
Chromic Oxide ◽  
Carcass Quality ◽  
Apparent Digestibility ◽  
Live Weight Gain ◽  
Feeding Value

SUMMARYBarley which had been stored after treatment with 0·8 % propionic acid was incorporated into pig diets in either the milled or the rolled form and its feeding value compared with that of barley stored dry and then ground, and of moist barley stored anaerobically and then rolled. The pigs were fed from 50 to 200 lb live weight on the four diets. Their performance was not affected by the method of storage of the barley, but those given rolled barley required 11% more dry matter per unit of live-weight gain than those given milled barley. There were no significant differences between the treatments in carcass measurements, or in apparent digestibility coefficients as measured by the chromic-oxide method.

scholarly journals Comparison of a Plantain-Chicory Mixture with a Grass Permanent Sward on the Live Weight Gain and Meat Quality of Lambs

Animals ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 2275
Author(s):  
Romina Rodríguez ◽  
Oscar Balocchi ◽  
Daniel Alomar ◽  
Rodrigo Morales
Keyword(s):  
Climate Change ◽  
Weight Gain ◽  
Meat Quality ◽  
Production Systems ◽  
Live Weight ◽  
Temperate Grasslands ◽  
Live Weight Gain ◽  
Final Weight ◽  
Sheep Production

Under the predicted conditions of climate change, the productivity of temperate grasslands may be affected by drought stress, especially in spring and summer. In this scenario, water-deficit-tolerant species such as plantain and chicory are interesting alternatives for use in sheep production systems. In this study, we compared a mixture of plantain and chicory herbage (PCH) with a grass-based permanent sward (GBS) on the weight gain and meat quality of lambs finished on these grasslands. Fifteen weaned lambs (31.3 kg and 4 months of age) were assigned to each treatment for seven weeks in late spring and live weight gain (LWG), carcass and meat quality were evaluated. There was a tendency (p = 0.09) in final weight (40.3 ± 0.8 kg) and live weight gain (173 ± 10 g/d) to be higher in PCH compared to GBS. Carcass weight, dressing percentage and meat quality in terms of pH, color and tenderness did not differ (p > 0.05) and were considered to be of good quality. We concluded that both swards result in comparable lamb performance and good meat quality.

Effects of supplementing maize and grass silages with barley, and maize silage with urea or ammonia, on the intake and performance of fattening bulls

1980 ◽  
Vol 31 (3) ◽  
pp. 243-250 ◽  
Author(s):  
K. Aston ◽  
J. C. Tayler
Keyword(s):  
Weight Gain ◽  
Dry Matter ◽  
Live Weight ◽  
Metabolizable Energy ◽  
Dry Matter Intake ◽  
Carcass Quality ◽  
Maize Silage ◽  
Live Weight Gain ◽  
Grass Silage ◽  
Ad Libitum

ABSTRACT1. Experiment 1. Six treatment groups of one British Friesian and four South Devon × British Friesian bulls, initially 432 kg mean live weight and aged 491 days, were offered individually maize or grass silage ad libitum plus 0, 5 or 10g barley dry matter per kg live weight daily for 80 days. The silages had similar digestible dry matter and estimated metabolizable energy contents but the grass silage contained more ammonia and acetic, propionic and butyric acids. Mean values for groups receiving respectively maize and grass silage diets were for dry-matter intake 17·7, 20·3, 20·4 and 13·0, 16·6, 18·7 g/kg live weight and for live-weight gain 1·00, 1·32, 1·46 and 0·65, 0·98, 1·22kg/day. Significantly more maize than grass silage dry matter was eaten when the silages were given alone and dry-matter intakes, live-weight and carcass gains were greater for maize silage diets. Dry-matter intake, live-weight and carcass gains, efficiency of feed use and carcass quality significantly improved when barley was given.2. Experiment 2. Six groups of five British Friesian bulls, initially 418 kg mean live weight and aged 474 days, were offered individually maize silage ad libitum with either urea or one of two quantities of aqueous ammonia mixed in at the time of feeding, plus 0 or 5 g barley dry matter per kg live weight daily for 90 days. The urea and ammonia-treated silages contained 125, 124 and 148 g crude protein per kg dry matter respectively, with pH values of 3·8, 3·9 and 4·3, and when given alone or with barley mean daily intakes (g dry matter per kg live weight) were 17·1, 18·6 for urea-treated silage diets, and 17·8, 18·8 and 16·9, 19·1 respectively for ammoniatreated silage diets. Live-weight gains were 0·69, 0·94, 0·63, 1·09, 0·64 and 1·07 kg/day. Ammonia treatment had no effect on intake or live-weight gain. Live-weight and carcass gains and carcass quality improved when barley was given.3. The maize silage offered in Experiment 1 contained similar metabolizable energy but more starch than that in Experiment 2 and was used more efficiently for live-weight gain.

Hexoestrol implantation of steers fattened at pasture II. Effects on empty weight, carcass weight and carcass quality

1964 ◽  
Vol 6 (1) ◽  
pp. 57-71 ◽  
Author(s):  
F. E. Alder ◽  
J. C. Tayler ◽  
J. E. Rudman
Keyword(s):  
Weight Gain ◽  
Live Weight ◽  
Carcass Weight ◽  
Carcass Quality ◽  
Live Weight Gain ◽  
Herbage Intake ◽  
Winter Grazing

The first paper of this series (Alder, Tayler and Rudman, 1964) described experiments carried out over 4 years on the effects of hexoestrol on live-weight gain and herbage intake in grazing steers. The 52 steers used weighed between 750 and 1,100 lb. initially and included four pairs of twins. The experiments lasted between 55 and 124 days and involved both summer and winter grazing. This paper is concerned with observations made on the animals after slaughter.

scholarly journals Influence of Selection and Genetic Parameters of the Eco-genotype of Mother Cows of the Aberdeen Angus Breed on the Breeding Value of Offspring

2020 ◽  
pp. 24-29
Author(s):  
В.М. Габидулин ◽  
С.А. Алимова ◽  
Х.Х. Тагиров
Keyword(s):  
Weight Gain ◽  
Genetic Parameters ◽  
Live Weight ◽  
Comprehensive Assessment ◽  
Breeding Value ◽  
Rank Distribution ◽  
Live Weight Gain ◽  
Complex Index ◽  
Experimental Part

Основной целью настоящего исследования являлось определение влияния селекционно-генетических параметров эко-генотипа коров-матерей абердин-ангусской породы на племенную ценность потомков. Экспериментальная часть работы выполнялась в условиях одного из предприятий Курганской области. Исследования проводились на коровах-матерях (n = 20) 5-летнего возраста и потомстве – бычках (n = 20) линии быка-производителя Бисмарка 5682 австралийской селекции и их аналогов – коровах и бычках линии быка-производителя Дизайна 1015 отечественной репродукции. Бычки проходили оценку по собственной продуктивности. В результате исследований установлено, что коровы линии Дизайна имели достоверное превосходство над представительницами линии Бисмарка по живой массе на 9,8% (Р < 0,001), по высоте в крестце – на 4,1% (Р < 0,001) и по молочности – на 2,4% (Р > 0,05). По результатам испытания бычков по собственной продуктивности с 8 до 15 месяцев выявлено достоверное преимущество бычков генотипа Дизайна относительно потомства Бисмарка по живой массе на 4,3% (Р < 0,001), по интенсивности среднесуточного прироста – на 7,4% (Р < 0,001), по выраженности типа телосложения – на 8,2% (Р < 0,01). Ранговое распределение потомков по комплексному индексу выявило превосходство линии Дизайна 1015 отечественной селекции. При этом средние величины изучаемых признаков потомков обеих линий превосходили своих сверстников в среднем по стаду. Комплексная оценка быков-производителей по качеству потомства с учётом генотипа матерей позволит более качественно выявлять продолжателей родоначальников, обладающих лучшей способностью совершенствования стада при их линейном разведении. The main goal of this research was to determine the influence of the selection and genetic parameters of the eco-genotype of mother cows of the Aberdeen-Angus breed on the breeding value of offspring. The experimental part of the work was carried out in the conditions of one of the enterprises of the Kurgan region. The researches were carried out on five-year-old mother cows (n = 20) and offspring – small bulls (n = 20) of the Bismarck servicing bull line 5682 of Australian breeding and their analogues – cows and small bulls of the Design servicing bull line 1015 of domestic reproduction. Small bulls were evaluated for their own productivity. As a result of researches it was found that cows of the Design line had a reliable superiority over representatives of the Bismarck line in live weight by 9.8% (P < 0.001), in height in the rump bone – by 4.1% (P < 0.001) and in milking capacity – by 2.4% (P > 0.05). According to the results of testing small bulls on their own productivity from 8 to 15 months, a reliable advantage of small bulls of the Design genotype relative to Bismarck's offspring on live weight was revealed by 4.3% (P < 0.001), on the intensity of the daily live weight gain – by 7.4% (P < 0.001), on the severity of the physique type – by 8.2% (P < 0.01). The rank distribution of offspring according to the complex index revealed the superiority of the Design line 1015 of domestic selection. Moreover, the average values of the studied features of offspring of both lines exceeded their herdmates on average in herd. A comprehensive assessment of servicing bulls on the quality of offspring taking into account the genotype of mothers will better identify the successors of the ancestors who have the best ability to improve the herd during their linear breeding.

Protein, lysine and feed intake level effects on pig growth. III. Regression analysis and economic aspects

1970 ◽  
Vol 75 (2) ◽  
pp. 189-205 ◽  
Author(s):  
J. B. Dent ◽  
R. Blair ◽  
P. R. English ◽  
J. R. Raeburn
Keyword(s):  
Regression Analysis ◽  
Weight Gain ◽  
Multivariate Regression ◽  
Crude Protein ◽  
Live Weight ◽  
Multivariate Regression Analysis ◽  
Lean Meat ◽  
Live Weight Gain ◽  
High Profit

SUMMARYData from the experiment described in the first paper of this series were subjected to regression analysis. Lean meat and live-weight gain response to both lysine and crude protein intake was almost linear in period 1 but in later periods little response was evident. Response of live-weight gain to increased energy was continuous though diminishing in the later periods. In periods 1 and 2 lean gains showed positive though diminishing response to energy.In a multivariate regression analysis it was clear especially for younger pigs that the response to dietary lysine for both live-weight and lean meat gains is influenced by the dietary level of crude protein and the energy intake. Separate multivariate analysis for each sex indicated that females are more efficient converters of lysine and energy into live weight and lean meat. Also an interaction between sex and dietary lysine level was suggested.A methodology for an economic analysis taking the joint objectives of total cost of production, speed of grain and quality of gain is established as a basis for design of high profit system of production.

The influence of a bio-active feed supplement (hormonexa) on the performance of beef cattle

1972 ◽  
Vol 14 (2) ◽  
pp. 167-170
Author(s):  
R. Laird ◽  
J. Walker-Love ◽  
I. A. Dickson
Keyword(s):  
Weight Gain ◽  
Beef Cattle ◽  
Live Weight ◽  
Carcass Quality ◽  
Food Conversion ◽  
Feed Supplement ◽  
Live Weight Gain

SUMMARY1. Hormonexa, a bio-active feed supplement, was included at the rate of 3·1 kg per 1000 kg of the concentrate ration for finishing Hereford · Ayrshire steers.2. Live-weight gain and food conversion were unaffected by the addition of Hormonexa.3. The killing-out percentage of the supplemented animals was significantly lower and their carcass quality was slightly, but not significantly, lower than that of the control animals.

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