scholarly journals Using factor analysis in beef cattle breeding

2019 ◽  
Vol 135 ◽  
pp. 01088 ◽  
Author(s):  
Alexey Zelenkov ◽  
Alexey Ermakov ◽  
Galina Zelenkova ◽  
Ivan Gorlov ◽  
Alexander Pakhomov ◽  
...  
Keyword(s):  
Factor Analysis ◽  
Beef Cattle ◽  
High Reliability ◽  
Average Daily Gain ◽  
Live Weight ◽  
Complex Nature ◽  
Cattle Breeding ◽  
Hereford Cattle ◽  
Daily Gain

Studies of the structure of the interaction of signs with the help of factor analysis is based on the idea of the complex nature of the phenomenon being studied, expressed in the interdependence of individual signs, determined by “internal” hidden causes, forming the specifics of a property, quality. We used the factor analysis method to study the producers’ assessments of the quality of the offspring and to test their bullsons for their own productivity of the Kalmyk and Hereford cattle breeds. The analysis included material from the work of pedigree reproducers and plants in the Kalmyk and Hereford breeds of the Rostov Region. The total number of animals included in the treatment was 96 manufacturing bulls and 272 sons bulls. As a result of the studies, the proposed breeding indices on one basis are quite suitable for the preliminary selection of bullcalves in commodity farms or in pedigree farmers for breeding beef cattle. In order to get a final assessment, we compiled new breeding indices, including two (live weight at 8 and 15 months, live weight at 15 months and average daily gain from 8 to 15 months), as well as three characteristics (live weight in 8, 15 months and average daily gain). These signs are objective, easy to account. According to the estimates obtained for individual bull-sons, it is possible by summing up the values of new factors to identify the bulls’ assessment of the quality of the offspring. Analysis of assessment materials is characterized by high reliability (P > 0.999).

GROWTH AND DEVELOPMENT OF SIMMENTAL BULLS DEPENDING ON PROGENY

2021 ◽  
Vol 1 (1) ◽  
pp. 3-10
Keyword(s):  
Growth And Development ◽  
Average Daily Gain ◽  
Live Weight ◽  
The Body ◽  
Cattle Breeding ◽  
Dairy Cattle Breeding ◽  
Breeding Selection ◽  
Productivity Indicators ◽  
Body Parameters ◽  
Daily Gain

In dairy cattle breeding, selection and breeding work is widely used in order to transfer the pedigree qualities of parents to the offspring and obtain highly productive young animals. In this regard, in the conditions of «Enbek» LLP in the Akmola region, the growth and development of young Simmental breed depending on the origin was studied. Live weight of Litera line young animals at birth was 33.4 kg, at the age of 6 months-174.9, 12 months-251.8, 18 months-387.1 kg, respectively, Wildfang bull 32.0 kg, 165.5 kg, 251.3 kg, 378.6 kg. The average daily gain between the ages of birth and 6 months was increased. With age, the body parameters, height at the withers, increased from 104.3 cm and 103.5 cm to 125.4 cm and 123.9 cm, respectively, from 6 months to 18 months of young animals. According to the physique indices, we can say that the young Simmental breed is balanced. Only some deviations of the leggy index are observed from the optimal indicators. The index of legginess decreases with age by 7.7%, with indicators of 6 months – by 57%, at the age of 18 months-by 49.3%. The extension index for the period from 6 to 18 months increased by 10.5%, respectively, for 6 months-by 103.3%, for 18 months-by 113.8%. With age and an increase in live weight, the body of young animals lengthens, its width increases, the animal becomes deeper and relatively long-legged. Depending on the origin, we suggest using the Litera bull line, taking into account the growth and development of young animals, and the productivity indicators of bulls.

Comparison of 2 growth patterns during the growing period in fattening bulls. 3. slaughter characteristics, carcass composition and meat quality

1993 ◽  
Vol 1993 ◽  
pp. 217-217
Author(s):  
A. Clinquart ◽  
C. Van Eenaeme ◽  
T. Van Vooren ◽  
J. Van Hoof ◽  
L. Istasse
Keyword(s):  
Meat Quality ◽  
Food Restriction ◽  
Early Stage ◽  
Average Daily Gain ◽  
Live Weight ◽  
Growth Patterns ◽  
Carcass Composition ◽  
Growing Period ◽  
Daily Gain

The degree to which growth patterns are modified after a period of food restriction affects the compositional changes of the carcasses(Carstens et al., 1992), furthermore, the growth rate has a direct effect on the physical properties of meat (Fishell et al., 1985). The objective of this experiment was to evaluate the effects of a severe food restriction at a early stage of maturity on the slaughter characteristics and meat quality of Belgian Blue bulls.Twelve Belgian Blue bulls (dual purpose type) weighing 233 kg were offered two different planes of nutrition during the growing period. Six bulls (Group-) received a restricted diet so that their average daily gain was 0.34 kg/d (Group+) during 202 days. By contrast six other bulls were given a more conventional growing diet and their average daily gain was 1.13 kg/d. Both Groups were fattened with similar diet and slaughtered when the live weight was close to 600 kg. Carcass weight was measured and killing-out proportion calculated, the composition of the carcass was estimated after dissection of ribs 7, 8, 9 removed 48 h post-mortem.

The growth and development of heifers of Alatau breed at different technologies of rearing

2020 ◽  
pp. 43-49
Author(s):  
S. Abugaliev ◽  
L. Bupebaeva ◽  
M. Baybatyrova ◽  
N. Matkerimov ◽  
K. Matkerimova
Keyword(s):  
Dairy Products ◽  
Systematic Approach ◽  
Average Daily Gain ◽  
Live Weight ◽  
Cost Effective ◽  
Cattle Breeding ◽  
Dairy Cattle Breeding ◽  
Young Cattle ◽  
The Republic ◽  
Daily Gain

At the present stage of economic development of the Republic of Kazakhstan dairy cattle breeding should be competitive, highly productive and cost-effective, which contributes to ensuring the country’s independence from imports of dairy products. The formation of milk productivity of future cows begins with the preparation of cows for calving and the purposeful rearing of replacement young cattle, based on the achievements of scientific and technical progress, a systematic approach to the production of high-quality products. The researches have been carried out in the farm “Tauelsizdik” in the Eskeldinsky district in the Almaty region in the Republic of Kazakhstan. According to the results of the research, the average daily gain of live weight in 3 months of the post-embryonic period was 458,9±71,9 g in heifers have reared in narrow-sized pens, and 682,2±44,6 g in heifers have reared in group pens. At 3 months of age the live weight of heifers at rearing in narrow-sized pens has reached 76,5±2,5 kg in narrow-sized pens, and 98,3±1,7 kg in group pens (P < 0,001). The data of the experiment have convincingly shown the effectiveness of rearing heifers in group pens. The live weight of heifers at birth was 36,4±1,1 kg, at one month of age – 54,2±1,6 kg, at 2 months of age the live weight increased to 70,2±2,1 kg, at 3 months of age to 87,4±3,3 kg, at 4 months of age to 116,8±3,5 kg, at 5 months of age to 132,7±4,2 kg and at 6 months of age to 157,4±4,6 kg. The indices of lengthiness, chest, hip-chest and blockiness increased up with age, while the indices of high-leg and overgrown decreased down. For example, the lengthiness index has increased with age from 90 to 97 %, the chest index from 62 to 70, and the high-leg index has decreased from 59 to 54, overgrowth from 109 to 108 %.

scholarly journals ВЛИЯНИЕ КАЧЕСТВА И УРОВНЯ ПРОТЕИНА В РАЦИОНАХ НА ИНТЕНСИВНОСТЬ РОСТА БЫЧКОВ НА ОТКОРМЕ

2019 ◽  
pp. 102-108
Author(s):  
D.G. Pogosyan
Keyword(s):  
Higher Education ◽  
Growth Rate ◽  
Educational Institution ◽  
Average Daily Gain ◽  
Live Weight ◽  
Federal State ◽  
Bull Calves ◽  
E Mail ◽  
Daily Gain

В статье представлены и обобщены результаты многолетних исследований по изучению влияния качества и уровня протеина в рационах на интенсивность роста бычков. В проведённых исследованиях установлено, что улучшение качества протеина в рационах откармливаемых бычков молочных пород в разные периоды роста за счёт снижения распадаемости протеина в рубце на 2,5-6,9 способствует увеличению среднесуточного прироста живой массы молодняка на 2,5-16,4 . Увеличение уровня протеина в рационах интенсивно откармливаемых бычков голштинской и абердин-ангусской пород в возрасте от 3 до 12 месяцев в 1,5 раза за счёт повышения скармливания концентратов позволяет существенно повысить среднесуточный прирост живой массы молодняка на 47 и 30 соответственно.Federal State Budgetary Educational Institution of Higher Education Penza State Agrarian University ,Russia, t. (8412) 62-81-51, e-mail: pogosyan.d.gpgau.ru The article presents and summarizes the results of many years of research on the influence of the quality and the level of protein in diets on the growth rate of bull-calves. The studies found that improving the quality of protein in the diets of fattening bull-calves of dairy breeds at different growth periods due to a decrease in protein disintegration in the rumen by 2.5-6.9 contributed to an increase in the average daily gain in live weight of young animals by 2.5-16.4 . An increase in the protein level in the diets of intensively fed calves of Holstein and Aberdeen Angus breeds aged from 3 to 12 months by 1.5 times due to increased feeding of concentrates significantly increased the average daily gain in live weight of young animals by 47 and 30 , respectively.

Features of the infl uence of feed protein supplement Biovitel on the growth and development of steers of Hereford breed

2020 ◽  
pp. 10-17
Author(s):  
E. Kokshanov ◽  
R. Fatkullin
Keyword(s):  
Growth And Development ◽  
Average Daily Gain ◽  
Live Weight ◽  
Feed Additive ◽  
Control Group ◽  
Intensive Rearing ◽  
Feed Protein ◽  
Daily Gain ◽  
Experimental Group

One of the ways to increase meat resources is to improve the condition of livestock on farms in the Russian Federation. This is due to the fact that when the fatness of the animal increases, the meat yield in the carcass increases. The purpose of the researches was to establish the features of the infl uence of the feed protein additive Biovitel on the growth and development of steers of Hereford breed. In order to achieve this purpose two groups of steers-analogs of Hereford breed (control and experimental) at the age of 6 months per 10 head in each have been formed. The time of the experiment was: the preparatory period of 22 days and the main one 275 days. Steers of the control group have received the main farm ration, and steers of the experimental group have received the main ration and feed protein additive Biovitel for 30 days with 10-days interval at the dose of 100 g per head during the sixth month. The results of researches on the infl uence of the feed protein additive Biovitel on the growth and development of steers of Hereford breed have been refl ected in the article. The addition of the feed additive Biovitel to the main ration of the experimental group of steers helped them to achieve a higher live weight and higher average daily gains under the same environments of feeding and housing in all age periods. By the end of the experiment (15 months) the experimental group of steers have reached the live weight of 430,2 kg, which was higher by 19,9 kg or 4,9 % compared to the control group of steers. In order to improve the quality of beef and increase its production more intensive rearing of steers of Hereford breed with the use of feed protein additive Biovitel has been justifi ed. The recommended dose is 100 g per head. This dosage allows you to achieve the average daily gain of 967,5 g and the average live weight of 430,2 kg by 15 months of age, reduce the prime cost and increase the profi tability of beef production.

РОСТ И РАЗВИТИЕ ТЕЛОК ГОРСКОГО СКОТА И ПОМЕСЕЙ С РУССКОЙ КОМОЛОЙ В ДАГЕСТАНЕ

2019 ◽  
pp. 22-25
Author(s):  
M.M. SADYKOV ◽  
M.P. ALIKHANOV ◽  
A.G. SIMONOV ◽  
G.A. SIMONOV
Keyword(s):  
Beef Cattle ◽  
Growth And Development ◽  
High Efficiency ◽  
Average Daily Gain ◽  
Live Weight ◽  
Beef Production ◽  
High Quality ◽  
Young Stock ◽  
Cattle Farming ◽  
Daily Gain

Изучены рост и развитие телок помесей горского скота с русской комолой породой в горной зоне Республики Дагестан. Доказана эффективность использования высокогорных пастбищ крупным рогатым скотом. Установлено, что молодняк помесных животных по сравнению с аборигенным скотом имеет более высокую живую массу при рождении на 1,2 кг, или на 6,9. При отъеме в 8месячном возрасте помесные телки имели живую массу 156 кг против 140 кг у аборигенного горского молодняка, что на 16 кг, или 11,4 больше. В 12, 15 и 18месячном возрасте живая масса помесных телок составляла 220,2 кг, 267 и 321,4 кг, соответственно, или на 27,1 кг, 36,4 и 45,1 кг больше по сравнению с горским скотом. Среднесуточные приросты помесного молодняка в среднем за период выращивания телок составили 556 г против 475 г, то есть они были выше на 17 по сравнению с горскими аборигенными телками. Промеры статей телосложения животных тоже были в пользу помесных. Высота в холке у помесей достигала в возрасте 8 мес 85,3 см, в 12 106,5 и в 18 мес 110,5 см, а у аборигенных телок горского скота высота в холке была значительно ниже по сравнению с помесями и составляла 79,8 см, 93,4 и 103,8 см, соответственно. В 18месячном возрасте телки горского скота уступали по высоте в холке помесям на 6,7 см, или на 6,4. Исследования свидетельствуют об эффективном использовании высокогорных пастбищ Дагестана помесным скотом. Такой подход к ведению мясного скотоводства в условиях горной зоны Республики Дагестан позволит увеличить производство дешевой и высококачественной говядины.Growth and development of hill cattle heifers and their cross breeds with Polled Russian breed are researched. Efficiency of utilizing mountain grass is proved. It is ascertained that cross breed young stock live weight at birth exceeds that of native ones by 1,2 kg or 6,9. Cross breed heifers at ablactation had live weight of 156 kg at 8month age versus 140 kg of native ones, which is 16 kg or 11,4 higher. Live weight of 12, 15, and 18month cross breed heifers was 220,2 kg, 267 kg, and 321,4 kg, respectively, which is 27,1 kg, 36,4 kg, and 45,1 kg greater in comparison with mountain cattle. Average daily gain of cross breed animals was 556 g versus 475 g, which is 81 g or 17 higher in comparison with mountain heifers. Shoulder height of cross breed heifers was at the age of 8 months 85,3 cm, 12 months 106,5 cm, and 18 months 110,5 cm, while mountain cattle height was sufficiently lower in comparison with cross breeds and was 79,8 cm, 93,4 cm, and 103,8 cm, respectively. At the age of 18 months mountain heifers were inferior to cross breeds by 6,7 cm of shoulder height, which is 6,4. The study reveals high efficiency of utilizing Dagestan mountain grass by cross breed cattle. Such approach to beef cattle farming provides for increase of cheap and high quality beef production.

THE EFFECT OF THE HEIGHT AT THE RUMP ON A LIVE WEIGHT AND AVERAGE DAILY GAINS

2016 ◽  
Vol 1 (3) ◽  
pp. 60-63
Author(s):  
Хакимов ◽  
Ismagil Khakimov ◽  
Живалбаева ◽  
Almagul Zhivalbaeva
Keyword(s):  
Correlation Coefficient ◽  
Average Daily Gain ◽  
Live Weight ◽  
High Gain ◽  
Average Correlation ◽  
Local Conditions ◽  
High Positive Correlation ◽  
Hereford Cattle ◽  
Factor Regression ◽  
Daily Gain

The purpose of the study – improvement of breeding and productive qualities of Hereford cattle by insemination bulls form the canadian selection. It is established that in young Hereford beef cattle between live weight and height at the sacrum and between the height at the sacrum and average daily gains there are mainly medium and high positive correlation (from 0.35 to 0.73) . Regression analysis has shown that the change in height in the sacrum on 1 cm, causes the increase of live weight of animals from 1.55 kg in animals of different lines and produktivity gain of calves from 7.67 g to amounted to 23.87g. The highest coefficient of the time average correlation coefficient of between the height at sacrum and live weight setlen in the group of heifers, obtained a bull from the absolute 49S, and the highest co-factor regression between these two traits in heifers obtained from a bull of a Wide Load 391W. The same trend holds when comparing groups correlation coefficient and regression between the height at the sacrum and average daily gain. It is noted that calves of all groups are well adapted to local conditions, and have high gain.

scholarly journals Fattening heifers on continuous pasture in mountainous regions – implications for productivity and meat quality

2013 ◽  
Vol 58 (No. 8) ◽  
pp. 360-368 ◽  
Author(s):  
M. Velik ◽  
I. Gangnat ◽  
R. Kitzer ◽  
E. Finotti ◽  
A. Steinwidder
Keyword(s):  
Beef Cattle ◽  
Average Daily Gain ◽  
Live Weight ◽  
Good Growth ◽  
Omega 3 ◽  
Beef Tenderness ◽  
Mountainous Regions ◽  
Growing Period ◽  
Carcass Performance ◽  
Daily Gain

Economical and ecological issues as well as consumer demand for sustainably produced agricultural food rise the trends to fatten beef cattle on pasture during the grazing season. However, particularly for mountainous regions, implications of turning beef cattle on pasture remain unclear concerning animal performance and product quality. Therefore, the present study was conducted to compare short grass grazing with a semi-intensive indoor fattening system in the Alps. Charolais &times; Simmental heifers of about 300 kg live weight were either fattened on continuous pasture (3&ndash;6 mm sward height) and finished in barn (Pasture group) or solely raised in barn on a grass silage-based diet with 2 kg concentrates (Indoor group). Animals were slaughtered at 550 kg live weight. Results showed that continuous pasture with a finishing period in barn allowed as good growth and carcass performance as fattening in barn. Over the whole experiment, average daily gain was 993 g/day in the Pasture group and 1026 g/day in the Indoor group. During the growing period, daily gain was numerically lower in the Pasture group than in the Indoor group (767 g and 936 g, respectively). Carcass fatness of pasture fed animals was lower but within the desirable threshold. Water holding capacity, meat colour, and shear force, an indicator for beef tenderness, were unaffected by feeding practices, but fat colour was more yellow in the Pasture group. Furthermore, meat from animals fattened on pasture had lower intramuscular fat contents and enhanced proportions of nutritionally valuable omega-3 fatty acids and conjugated linoleic acids. &nbsp;

scholarly journals Performance of finishing beef cattle fed different diets containing whole-crop maize silage or sugarcane silage

2011 ◽  
Vol 40 (3) ◽  
pp. 682-689 ◽  
Author(s):  
Juliano Roman ◽  
Clóves Cabreira Jobim ◽  
Flávio Dutra de Resende ◽  
Gustavo Rezende Siqueira ◽  
Marcelo Henrique de Faria ◽  
...  
Keyword(s):  
Beef Cattle ◽  
Average Daily Gain ◽  
Subcutaneous Fat ◽  
Live Weight ◽  
Feed Conversion ◽  
Maize Silage ◽  
Subcutaneous Fat Thickness ◽  
Fat Thickness ◽  
Finishing Beef Cattle ◽  
Daily Gain

The objective of the present study was to evaluate the performance of beef cattle in feedlots fed diets containing either whole-crop maize silage or sugarcane silage, and with different formulations. Five diets were evaluated: MSF - diet containing whole-crop maize silage, with fixed formulation during feedlot period; MSV- diet containing whole-crop maize silage, with variable formulation according to feedlot phase; SCSF - diet containing sugarcane silage with fixed formulation; SCSV- diet containing sugarcane silage, with variable formulation; SCSV/MSV- SCSV diet in initial half of fedlot and MSV diet in final half of feedlot period, respectively. It was used a complete random experimental design, with five treatments and three replicates (pens). It was used 285 steers at 36 months of age, with an initial body weight of 362.4 kg. Diets with whole-crop maize silage promoted greater intake of dry matter (10.5 kg and 2.4% BW) compared with diets containing sugarcane silage (10.1 kg and 2.3% BW). There was no effect of the silages on average daily gain (1.348 kg/animal/day) and live weight at slaughter (481.2 kg BW). SCSV/MSV diet promoted the worst feed conversion (8.0 kg DM/kg BW). Animals fed diets composed of whole-crop maize silage presented greater weight of hot carcass, of carcass yield and subcutaneous fat thickness (262.1 kg, 54.1% and 6.2 mm) compared with the animals fed sugarcane silage (252.5 kg, 52.7% and 4.8 mm). The use of sugarcane silage in diets for finishing beef cattle is feasible and the adjustment of formulation during confinement period does not influence performance of the animals. Replacement of sugarcane silage by whole-crop maize silage during the feeding period affects negatively feed conversion.

scholarly journals Beef cattle production in established integrated systems

2017 ◽  
Vol 38 (5) ◽  
pp. 3241 ◽  
Author(s):  
Érick Lemes Gamarra ◽  
Maria Da Graça Morais ◽  
Roberto Giolo de Almeida ◽  
Natália Aguiar Paludetto ◽  
Mariana Pereira ◽  
...  
Keyword(s):  
Beef Cattle ◽  
Average Daily Gain ◽  
Live Weight ◽  
Forage Yield ◽  
Integrated Systems ◽  
Cattle Production ◽  
Forage Production ◽  
Yield Difference ◽  
Beef Cattle Production ◽  
Daily Gain

The aim of the current study is to assess three integrated systems presenting different eucalyptus tree densities due to animal and forage production. The following integrated systems were assessed: crop-livestock-forest with 357 eucalyptus trees ha-1 (ICLF1); crop-livestock-forest with 227 eucalyptus trees ha-1 (ICLF2); and crop-livestock with 5 remnant native trees ha-1 (ICL). The randomized block experimental design was applied in a split-plot scheme with four replicates. The Average Daily Gain (ADG, g animal-1day-1) and the live-weight gain per area (LWG, kg ha-1) were applied to analyze animal performance, which was set by weighing the animals every 28 days (the animals previously fasted for 16h). Forage yield was higher in ICL during fall and winter; in summer, it did not differ from ICLF2. There was no forage yield difference between the ICL and ICLF2 systems in any of the assessed seasons; summer was more productive in ILPF1 than other seasons. The highest leaf crude protein contents (CP) in summer was recorded in systems ICLF1 and ICLF2, and the highest value recorded in fall was found in ILPF1; the lowest was found in ILP. On the other hand, the highest leaf NDF contents in summer were found in ILP. The highest ADG were found in summer. The highest LWG values recorded for the ICL and ICLF2 systems were collected in summer and fall; there was no difference in any of the three systems in winter. The LWG was higher in all system in summer. The ICLF2 emerged as the system (with trees) most appropriate for beef cattle production. Despite the shading interference on forage production, such condition is compensated by the best nutritional contents such as CP. The ICLF2 system allowing an annual LWG of 83% in relation to the ICL system during the fifth year of establishment of the systems.

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