BREEDING BULLS GROWTH AND DEVELOPMENT IN THE CONDITIONS OF A BREEDING ENTERPRISE JSC KRASNOYARSKAGROPLEM

Bulletin of KSAU Pub Date : 2024-07-10 DOI:10.36718/1819-4036-2024-5-137-145

Firuz Mirvaliev, E. Chetvertakova

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Abstract

The purpose of research is to study the growth and development of bulls in the conditions of JSC Krasnoyarskagroplem in the Krasnoyarsk Region. Objectives: to study changes in live weight, linear measurements and body composition indices during ontogenesis. The object of the study is bulls of the Holstein (red-motley) (n = 11) and red-motley (n = 4) breeds aged from one to five years. Study period: 2014–2019. Calculation of absolute growth, taking body measurements, and calculation of indices were carried out according to generally accepted methods. Holstein bulls at all age periods exceeded red-motley bulls in height at the withers and oblique length of the body. Bulls of the red-motley breed in chest width at one year of age exceeded Holstein sires by 3.25 %; at 1.6 years – by 13.8 (P > 0.95); in the 2-year period – by 14.1 (P > 0.999); in a 3-year-old – by 7.59; in a 4-year-old – by 6.1; in a 5-year-old – by 9.7 % and metacarpal girth: by 3.1; 2.4; 1.3; 4.5 % (P > 0.95), by 2.4 and 1.2 %, respectively. The variabi-lity of traits in bulls of the Holstein and red-motley breeds was characterized by a low degree at all age periods, which indicates the homogeneity of the population and high stability of exterior qualities. Calculation of indices characterizes red-motley bulls as compact with a low-set body, having a long body and a deeper chest. Holstein bulls have higher legs. Red-mottled breed and Holstein bulls have a pronounced milk type.

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种公牛在 JSC Krasnoyarskagroplem 育种企业条件下的生长和发育

研究目的是研究公牛在克拉斯诺亚尔斯克地区克拉斯诺亚尔斯克股份公司（JSC Krasnoyarskagroplem）条件下的生长发育情况。目标：研究公牛在生长发育过程中活体重、线性测量值和身体成分指数的变化。研究对象为 1 至 5 岁的荷斯坦（红毛丹）公牛（11 头）和红毛丹公牛（4 头）。研究时间：2014-2019 年。绝对生长量的计算、体格测量和指数计算均按照公认的方法进行。各年龄段的荷斯坦公牛在肩高和身体斜长方面均超过红毛丹公牛。红毛丹种公牛 1 岁时的胸宽比荷斯坦种公牛大 3.25%；1.6 岁时大 13.8（P > 0.95）；2 岁时大 14.1（P > 0.999）；3 岁 - 增加 7.59%；4 岁 - 增加 6.1%；5 岁 - 增加 9.7%；掌骨周长：分别增加 3.1%、2.4%、1.3%、4.5%（P > 0.95）、2.4% 和 1.2%。荷斯坦和红毛丹品种的公牛在所有年龄段的性状变异程度都很低，这表明种群的同质性和外部品质的高度稳定性。根据指数计算，红毛丹公牛体型紧凑，身体低矮，身体较长，胸部较深。荷斯坦公牛的腿较高。红毛丹种公牛和荷斯坦公牛的奶型明显。

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Bulletin of KSAU

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