Effect of first lactation milk yield on efficiency of cows in herds with different production levels

Sawa, Anna; Krężel-Czopek, Sylwia

doi:10.5194/aab-52-7-2009

Cited by 17 publications

(22 citation statements)

References 9 publications

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“…In the study of Sawa and Krężel-Czopek (2009) coefficient of correlation between the first lactation milk yield and lifetime milk yield was 0.452, which was significantly higher than the one reported in or study. Highly significant relationships were shown for the percentage of fat (0.622) and protein (0.570) content (Table 4).…”

Section: Resultscontrasting

confidence: 64%

“…The lifetime milk performance of cows is dependent on many factors (Heinrichs and Heinrichs, 2011;Sawa and Krężel-Czopek, 2009), inter alia, on the initial phase of the use of animals and the age at first calving (Bach, 2011;Berry and Cromie, 2009;Cozler, et al, 2008;Ettema and Santos, 2004;Januś and Borkowska, 2012;Nilforooshan and Edriss, 2004;Sitkowska and Mroczkowski, 2005). The early age at first mating, course of pregnancy and beginning of milking, have a huge impact on the animal's body and its future efficiency (Berry and Cromie, 2009;Cozler, et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

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Relationship between primiparas first 100-days lactation and their lifetime milk production in Polish Holstein-Friesian Cattle

Sitkowska¹,

Piwczyński²,

Lach³

et al. 2015

j. cent. eur. agric.

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The aim of this study was to identify the relationship between the lifetime performance of cows and their performance during the first 100 days of lactation. The studied material consisted of breeding documentation for 2,347 Holstein-Friesian cows, that were used for milk production between 1995 and 2010, in the Pedigree Breeding Centre in Osięciny. Such parameters as milk yield, fat (kg, %) and protein content (kg, %) were taken into consideration while analysing the results for the first 100 days of lactation and the lifetime milk performance. The study included only animals that had already been culled. Results indicate that the factors affecting the primiparas milk production during the 100-day lactation are as follows: herd, year and season of first calving as well as the age at first calving. It was proven that the sources of variation in the lifetime performance, in terms of the milk yield, fat and protein content, were: herd, year of first calving, age at first calving and the level of milk yield during the first 100 days of primiparas lactation. It was observed that the season of first calving did not significantly affect milk performance traits throughout the cows productive life. The calculated correlation coefficients, mainly of weak relationship between levels of the lifetime performance and the 100-day performance, showed a moderate positive correlation between the percentage content of fat and protein in milk in both periods.Keywords: age at first calving, lifetime performance, predicting, primiparas StreszczenieCelem badań było określenie związku między poziomem wydajności życiowej krów oraz ich wynikami w ciągu pierwszych 100 dni laktacji. Badanie przeprowadzono na podstawie dokumentacji hodowlanej dotyczącej 2,347 krów holsztyńsko-fryzyjskich, które były użytkowane mlecznie w latach 1995 -2010, w Ośrodku Hodowli Zarodowej w Osięcinach. Zebrano informacje dotyczące produkcyjności mleka, tłuszczu (kg,%) i białka (kg,%). Wzięto pod uwagę wyniki z pierwszych 100-dni laktacji i wydajności życia. Do badania włączono tylko zwierzęta, które zostały już wybrakowane ze stada. Analizy wykazały, że czynnikami wpływającymi na poziom cech mleczności pierwiastek, podczas laktacji 100-dniowej, były: stado, rok pierwszego wycielenia, sezon pierwszego wycielenia oraz wiek pierwszego wycielenia krów. Udowodniono, że źródłem zmienności użytkowości życiowej w zakresie wydajności mleka, tłuszczu i białka były stado i rok pierwszego wycielenia, wiek pierwszego wycielenia oraz poziom wydajności mlecznej podczas pierwszych 100-dni laktacji pierwiastek. Stwierdzono, że sezon pierwszego wycielenia nie wpłynął znacząco na poziom cech mleczności w całym okresie produkcyjnym krów. Obliczone współczynniki korelacji, na ogół o słabych zależnościach między poziomem wydajności 100-dniowych i życiowych, wykazały umiarkowane dodatnie zależności między procentową zawartością tłuszczu i białka w mleku w obu badanych okresach.Słowa kluczowe: pierwiastki, przewidywanie, wiek pierwszego wycielenia, wydajność życiowa Detailed ...

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Section: Resultscontrasting

confidence: 64%

Section: Introductionmentioning

confidence: 99%

Relationship between primiparas first 100-days lactation and their lifetime milk production in Polish Holstein-Friesian Cattle

Sitkowska¹,

Piwczyński²,

Lach³

et al. 2015

j. cent. eur. agric.

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“…These results suggest that primiparous cows under both LF and HF management may continue to support high production and energetic efficiency with body reserves throughout lactation. This is further supported by Sawa and Krężel-Czopek (2009), who stated that higher-yielding first-lactation cows demonstrated longer calving intervals, likely due to an increased allocation of resources to milk production.…”

Section: Discussionmentioning

confidence: 68%

Biological efficiency profiles over the lactation period in multiparous high-producing dairy cows under divergent production systems

et al. 2015

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Abstract. The study examined variation in energetic-efficiency profiles among production systems and cow parities. Further, the correlation between cows' body condition score (BCS) and energetic efficiency over the lactation period was determined. Biological efficiency was defined using four measures of production efficiency and two measures of energetic efficiency. The following were measures of energetic efficiency: the net energy intake required to produce 1 kg milk solids (NE in / MS) and the proportion of net energy utilized for milk production after accounting for maintenance (NE lact / (NE in − NE m )). Seven years of data were gathered from a total of 595 Holstein-Friesian cows in a long-term genetics × feeding-management interaction project. Two feeding regimes -High forage (HF) and Low forage (LF) -were applied to each of two genetic lines (Control (C) and Select (S)), giving four dairy production systems: Low Forage Control (LFC), Low Forage Select (LFS), High Forage Control (HFC) and High Forage Select (HFS). LFS was the most efficient system using all measures. Variation in the rate and scale of change at which the cows' energetic efficiency declined over lactation was significantly different (P < 0.001) amongst different dairy production systems and parities. Loss of efficiency over the lactation period was lower in Select cows than in Control cows and increased with parity. The trajectory of energetic-efficiency profiles was influenced by cow genetic line, and yet the level of the efficiency profile was influenced by the feeding regime. There was a strong relationship between BCS and energetic efficiency. Continued in situ monitoring of cows' biological efficiency may enable optimal management of dairy systems.

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“…Cow lifetime performance characteristics may include length of productive life, number of lactations, number of lifetime milking days, lifetime productivity and mean lifetime productivity in a certain period of time, for example, per day (Sawa and Krężel-Czopek, 2009;Ahlman et al, 2011;Heinrichs and Heinrichs, 2011). The aforementioned indicators are to a large extent complementary and their combined use provides a comprehensive evaluation of lifetime dairy performance.…”

Section: Introductionmentioning

confidence: 99%

Associations between strain, herd size, age at first calving, culling reason and lifetime performance characteristics in Holstein-Friesian cows

Adamczyk

Makulska

Jagusiak

et al. 2017

Animal

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Cow longevity and lifetime performance traits are good indicators of breeding effectiveness and animal welfare. They are also interrelated with the economics of dairy herd. Unfortunately, a high milk yield is often associated with deteriorated cow health and fertility and, consequently, with an increased culling rate. This situation, observed also in the Polish population of Holstein-Friesian cattle, inspired us to undertake a study on the associations between some factors and lifetime performance characteristics. The data set consisted of the records on 135 496 cows, including 131 526 of the Black and White strain (BW), and 3970 of the Red and White strain (RW) covered by performance recording and culled in 2012. It was found that cows of the BW strain and those from the largest herds (>100 cows) reached higher lifetime and mean daily energy-corrected milk (ECM) yields than cows of the RW strain and those from smaller herds culled at a similar age. Cows youngest at first calving (<2.0 years) were characterised by the highest lifetime ECM yield. It indicates that heifers can be bred even when they are younger than 15 to 16 months with no significant negative effect on their later performance. Infertility and reproduction problems (39.6%) and udder diseases (15.5%) constituted the most frequent reasons for cow culling. Cow longevity and lifetime productivity were considerably affected by the interactions between the studied factors.

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Effect of first lactation milk yield on efficiency of cows in herds with different production levels

Cited by 17 publications

References 9 publications

Relationship between primiparas first 100-days lactation and their lifetime milk production in Polish Holstein-Friesian Cattle

Relationship between primiparas first 100-days lactation and their lifetime milk production in Polish Holstein-Friesian Cattle

Biological efficiency profiles over the lactation period in multiparous high-producing dairy cows under divergent production systems

Associations between strain, herd size, age at first calving, culling reason and lifetime performance characteristics in Holstein-Friesian cows

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