Effect of Age at First Calving and First Lactation Milk Yield on Productive Life Traits of Syrian Shami Cows

Almasri, Obaida; Abou-Bakr, S.

doi:10.21608/ejap.2020.104022

Cited by 4 publications

(3 citation statements)

References 15 publications

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“…Both 305-day milk yield and milk yield per day of life in Slovak Spotted cows were similar to these traits in Jersey cows (Boothby et al, 2020) and markedly higher than in Syrian Shami cows (Almasri et al, 2020). An increase of 305-day milk yield agreed with findings of Bujko et al (2020) for cows of the same breed.…”

Section: Resultssupporting

confidence: 69%

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Effect of grazing on lifetime performance and longevity of Holstein and Slovak Spotted cattle

Huba¹,

Oravcová²,

Pavlík³

et al. 2023

JCEA

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The objective of the study was to analyse longevity and lifetime performance traits in dependence on access to grazing (G). Data of Holstein and Slovak Spotted dairy cows (143,566 and 30,412 heads culled between 2006 and 2019) were included. Within each breed, three groups of cows were considered: (1) cows not grazed throughout their entire life, (2) cows seasonally grazed as heifers (in summer), (3) cows seasonally grazed throughout their entire life (in summer). Eight (four longevity and four lifetime milk performance) traits were analysed. General Linear Model with fixed factors: G, herd nested within G, culling year, and cow's age at first calving as covariate was applied. Cows of group (1) had the highest 305-day milk yield: 8,005.0±7.1 kg (Holstein) and 5,985.3±13.0 kg (Slovak Spotted) and lifetime milk yield: 18,408.5±59.4 kg (Holstein) and 18,237.2±129.1 kg (Slovak Spotted). Holstein cows of group (1) had the highest length of productive life (882.4±2.5 days) and number of lactations (2.37±0.01). The highest length of productive life (1,298.0±16.4 days) and number of lactations (3.46±0.04) were found in Slovak Spotted cows of group (3). The best lifetime performance (regardless of breed) was expected in cows not grazed; whereas, the best longevity traits were expected in Slovak Spotted cows seasonally grazed throughout their lives. Surprisingly, in Holstein cows, the best longevity traits were found in animals that were not grazed. This suggests that the living conditions of housed Holstein cows did not negatively affect their longevity.

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Section: Resultssupporting

confidence: 69%

“…Appropriate treatment and adequate nutrition enable heifers to reach reasonable body weight and age at first calving, and to manifest their lifetime potential (Almasri et al, 2020). Hence, factors of farm and local conditions were found to influence age at first calving (Castillo Badilla et al, 2011;Valchev et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Effect of grazing on lifetime performance and longevity of Holstein and Slovak Spotted cattle

Huba¹,

Oravcová²,

Pavlík³

et al. 2023

JCEA

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“…The studied traits were calculated according to Sawa et al, (2019) and Almasri et al, (2020) as follows: 1-The longevity traits:…”

Section: Studied Traitsmentioning

confidence: 99%

comparative study between Shami and Holstein cows for longevity and productive lifetime traits under subtropical conditions

Almasri,

Abou-Bakr,

Ibrahim

et al. 2023

J. Indonesian Trop. Anim. Agric.

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This study aimed to compare the longevity and productive lifetime traits between Shami and Hol-stein cows under subtropical conditions, in addition to assess the effect of age at first calving (AFC), first lactation milk yield (FLMY), year and season of first calving on the studied traits in both breeds. The available data included 495 records for Shami and 1129 records for Holstein from birth to disposal date during the period from 1982 to 2014.The studied traits were lifespan (LS), productive life (PL), cow efficiency index (CEI), number of calvings (NC), lifetime milk production (LMP), total lactation periods (TLP), lifetime daily milk production (LDMP), and total dry periods (TDP). The least squares means of LS, PL, CEI and NC were 96.3±1.80 months, 73.2±2.80 months, 64.9±0.008 % and 4.3±0.12 calving for Shami cows in respective order. The corresponding figures for Holstein cows were 66.1±1.81 months, 43.5±2.81 months, 56.4±0.012 % and 3.5±0.19 calving, respectively. The means of LMP, TLP, LDMP and TDP were 7713±563.38 kg, 787±33.43 days, 2.7±0.13 kg and 890±25.55 days for Shami cows and 14406±875.77 kg, 1049±51.96 days, 5.9±0.20 kg and 275±39.72 days for Hol-stein, respectively.The effect of breed was highly significant (P<0.01) on all studied traits. Cows for both breeds with AFC less than 24 months had more PL and NC. Also, cows with the highest average FLMY had the highest LMP, LDMP and TLP. It could be concluded that under the subtropical condi-tions, Shami cows exhibit superiority for longevity traits compared to Holstein ones.

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Genetic analysis of first lactation and lifetime performance traits in composite Vrindavani cattle: important considerations for higher milk production

Tamilarasan,

Ahmad,

Panda

et al. 2024

Trop Anim Health Prod

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Effect of Age at First Calving and First Lactation Milk Yield on Productive Life Traits of Syrian Shami Cows

Cited by 4 publications

References 15 publications

Effect of grazing on lifetime performance and longevity of Holstein and Slovak Spotted cattle

Effect of grazing on lifetime performance and longevity of Holstein and Slovak Spotted cattle

comparative study between Shami and Holstein cows for longevity and productive lifetime traits under subtropical conditions

Genetic analysis of first lactation and lifetime performance traits in composite Vrindavani cattle: important considerations for higher milk production

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