Effect of lactation number, year, and season of initiation of lactation on milk yield of cows hormonally induced into lactation and treated with recombinant bovine somatotropin

Mellado, Miguel; Antonio-Chirino, E.; Meza-Herrera, César A.; Véliz-Deras, Francisco Gerardo; Arévalo, J. R.; Mellado, Jesús; Santiago, Á. de

doi:10.3168/jds.2011-4152

Cited by 53 publications

(45 citation statements)

References 38 publications

(43 reference statements)

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“…Moreover, the evolution of the milk yield along the productive life of our organic HolsteinFriesian cows was very similar to that observed in their conventional counterparts. Milk yield production along the productive life has been well studied (Ray et al, 1992;Mellado et al, 2011;Ríos-Utrera et al, 2013): the increase of milk yield with increased parity is due to differences in the control of tissue mobilization between primiparous and multiparous cows (Wathes et al, 2007); lower consumption of feed per day of primiparous cows than multiparous cows (Dado & Allen, 1994), and increasing body size of older cows over that of firstlactation animals (Mellado et al, 2011). In general it is assumed that milk yield per lactation increased significantly until 3 rd lactation and is maximum between 4 th and 5 th lactation (Ray et al, 1992;Gader et al, 2007;Ríos-Utrera et al, 2013).…”

Section: Discussionmentioning

confidence: 99%

Holstein-Friesian milk performance in organic farming in North Spain: Comparison with other systems and breeds

et al. 2017

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Organic systems are highly dependent on the environment and require animals well adapted to local conditions. In Spain, organic dairy farmers are not satisfied with the productive performance of their herds and ask for technical advice to obtain suitable animals for organic systems. The milk productive performance (milk yield, nutritional composition, and somatic cell count) of Holstein-Friesian cows in organic farming in North Spain compared with conventional farms has been analysed. When breed diversity was present in the same organic farm, Holstein-Friesian milk performance was compared with other breeds and/or crosses. Holstein-Friesian cows in organic farming produce slightly less milk than grazing conventional cows, but milk was similar in composition and somatic cell count across systems. The limited data from organic farms where breed diversity exists indicate that Holstein-Friesian cows produce numerically more milk than other breeds and crosses but with statistically lower protein content. Considering that in Spain organic milk production is mostly used for liquid milk consumption and that the payment system is based only on milk volume, Holstein-Friesian cows would better fit the farmer interests than other breeds or crosses. However, in addition to productive performance, reproductive efficiency, animal health and consumer's preferences should be fully considered when selecting a breed for organic production. If Holstein-Friesian was the selected breed, efforts should be made to identify cows within the breed that are best adapted to organic conditions. New productive, reproductive, nutritional and economic studies would be needed to develop a genetic merit index for organic systems.Additional key words: dairy cattle; milk composition; crosses; suitability; production systems.Correspondence should be addressed to Marta López Alonso: marta.lopez.alonso@usc.esAbbreviations used: DCR (dairy control record); FS (farm system); LG (lactation group); SCC (somatic cell count).

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Section: Discussionmentioning

confidence: 99%

Holstein-Friesian milk performance in organic farming in North Spain: Comparison with other systems and breeds

et al. 2017

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“…The number of modeled lactations was highest for L1 and then decreased thereafter (Table 2); this is probably an artifact of the voluntary early culling typical of intensive production dairy herds (15,23) . The incomplete gamma function represented most (89.8 %) of the studied lactations, but all the L1 and L2 lactations had good fit (P<0.05).…”

Section: Resultsmentioning

confidence: 99%

Estimación Tier II de emisión de metano entérico en hatos de vacas lactantes en Querétaro, México

López

Escobar

Azpiri

et al. 2016

Rev. Mex. Cienc. Pecu.

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RESUMENEl metano (CH 4 ) contribuye al cambio climático y su fuente antropogénica más importante es la fermentación entérica del ganado. A nivel continental el Panel Intergubernamental de Cambio Climático establece factores de emisión entérica de CH 4 por defecto (Tier I); pero las decisiones y evaluación de la mitigación necesitan estimaciones más exactas. Así, el objetivo fue calcular la emisión de metano entérico de hatos de vacas Holstein-Friesian en Querétaro, México con datos de pesaje de leche (Tier II). Las curvas de lactación se modelaron con la función gamma incompleta por lactancia y hato. Un total de 11,092 lactancias del 2007 tuvieron un rendimiento ajustado a 305 días (d) de 9,985 kg leche. La curva de lactancia fue diferente entre primíparas y multíparas; la duración de la lactancia fue 365±21 días. Durante la lactancia, la emisión entérica para primíparas y multíparas a 305 días fue 165.7±3.8 y 181.6±8.3 kg CH 4 vaca -1 ; a 365 d fue de 201.8±4.6 y 223.7±11.0 kg CH 4 vaca -1 (P<0.0025). La intensidad de emisión entérica fue semejante entre primíparas y multíparas (18 y 19 g CH 4 kg -1 leche), similar a lo reportado en la literatura para vacas de alta producción intensiva. Los registros de rendimiento fueron útiles para caracterizar el rendimiento, duración de la lactancia y el efecto de número de lactancia en su influencia sobre los estimados de intensidad de emisión entérica.PALABRAS CLAVE: Cambio climático, Factor de emisión, GEI, Mitigación, Metano. ABSTRACTMethane (CH 4 ) contributes to climatic change and livestock enteric fermentation is the most important anthropogenic source. The Intergovernmental Panel on Climate Change establishes continental default emission factors for enteric methane (Tier I); but decisions and evaluation of mitigation needs more precise estimates. Therefore, the objective was to calculate the enteric emission of Holstein-Friesian herds in Queretaro, México using milk test-day records (Tier II). Lactation curves were modeled using the incomplete gamma function according to lactation number and herd. A total of 11,092 lactations from 2007 had an average 305 d milk yield of 9,985 kg. Lactation curve was different between primiparous and multiparous; average days in milk were 365±21 d. During lactation, the primiparous and multiparous enteric emission at 305 d was 165.7±3.8 and 181.6±8.3 kg CH 4 head -1 ; at 365 d was 201.8±4.6 and 223.7±11.0 kg CH 4 head -1 (P<0.0025). Enteric emission intensity was similar between primiparous and multiparous (18 and 19 g CH 4 kg -1 milk), similar to reports in the literature for high yielding cows. Test day records were useful to characterize yield, days in milk and parity influencing the estimates of enteric emission intensity.

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“…As a result, the dairy cows can live longer and bring their genetic potential for the highest milk yield. It's known that the lactation performance of the cow increases with the age up to resulting in high performance (Fahr and Lengerken, 2003;Mellado et al, 2011). This increase can occur up to 4 to 5 lactations (Ray et al, 1992;Mellado et al, 2011).…”

Section: Results Inmentioning

confidence: 99%

“…It's known that the lactation performance of the cow increases with the age up to resulting in high performance (Fahr and Lengerken, 2003;Mellado et al, 2011). This increase can occur up to 4 to 5 lactations (Ray et al, 1992;Mellado et al, 2011). In the present study, the average of lactation numbers during the study period increased from 2.3 to 3.5, from 1.82 to 2.92 and from 1.05 to 2.16 in the farm 1, 2 and 3 (Fig.…”

Section: Results Inmentioning

confidence: 99%

The effect of using quarter individual milking system “MultiLactor” on improvement of milk performance and milk quality of different dairy cows breeds in different farms

Kaskous¹

2018

Emir J Food Agric

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Milking machine is an important factor in milk performance and milk quality during the course of milk removal in dairy cows. The purpose of the present study was to determine the effect of using quarter individual milking system “MultiLactor” (ML) on improvement of milk performance and milk quality of different dairy cows breeds in different farms. A quarter individual Milking system ML has a single guided tubes with a vacuum of 34 kPa, pulsation rate of 60 cycle/min and ration of 60 to 40%. The system has also a periodic air inlet and a sequential pulsation. In this study, milking data were collected from 170 Holstein Friesian cows (Farm 1), 130 Holstein Friesian (red) cows (Farm 2) and 54 Brown Swiss cows (Farm 3). Quantitative and qualitative milk data of these farms have been recorded by Association of milk records, Switzerland. The primary milking data of cows were collected during the period from 2010 to 2015 after using the new milking system. The data were later processed with Excel program and analyzed using the statistical analysis system (SAS). The results are presented as least square means with standard errors (LSM±SE) and the significant difference was set at (P<0.05). The daily milk yield during the study period from 2010 to 2015 increased significantly to 117% (from 34.64±1.23 to 40.51±1.00 kg/day/animal), 162% (from 20.29±1.37 to 30.88±0.65 kg/day/animal) and 151% (from 15.04±0.83 to 22.71±0.54 kg/day/animal) in farms 1, 2 and 3 respectively after using of ML milking system. Fat and protein content of the milk also increased during the same period of three breeds and farms. However, the results showed that the milking system ML had significant effects on the udder health status by reducing continuously somatic cell count (SCC) in milk by 54.81%, 51.54% and 51.66% in farm 1, 2 and 3 respectively during the study period. Furthermore, Lactation number of the cows were continuously increased in the study during the same period. In conclusion, after 5 years of using ML, it has been shown that a quarter individual milking machine was adapted to the physiological requirements of dairy farms and different breeds and the milk removal with ML brings better quantity and quality of milk in terms of improved milk performance, fat %, protein % and lower number of SCC in the milk.

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Effect of lactation number, year, and season of initiation of lactation on milk yield of cows hormonally induced into lactation and treated with recombinant bovine somatotropin

Cited by 53 publications

References 38 publications

Holstein-Friesian milk performance in organic farming in North Spain: Comparison with other systems and breeds

Holstein-Friesian milk performance in organic farming in North Spain: Comparison with other systems and breeds

Estimación Tier II de emisión de metano entérico en hatos de vacas lactantes en Querétaro, México

The effect of using quarter individual milking system “MultiLactor” on improvement of milk performance and milk quality of different dairy cows breeds in different farms

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