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Dissertations / Theses on the topic 'Milking frequency; Milk yield'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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1

Hardin, Diana Kaitlyn. "Local regulation of increased milk yield due to early lactation increased milking frequency." Thesis, Virginia Tech, 2015. http://hdl.handle.net/10919/55122.

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Increased milking frequency (IMF) during early lactation increases milk yield not only during the IMF period, but also after the cow is returned to twice daily milking (2X). The increase in yield is locally regulated within the gland; however the mechanism for the increase in yield is unknown. The objective of this study was to demonstrate a difference in milk and component yield, both during the IMF period and throughout the remainder of lactation, and examine potential local mechanisms driving the increase in production. Eight multiparous dairy cows were assigned to unilateral frequent milki
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2

Sorensen, Annette. "Manipulation of lactation persistency to achieve extended lactation in dairy cows." Thesis, University of Glasgow, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.327578.

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3

Tate, Kaley Renee. "Evaluating the duration of increased milking frequency during early lactation for increased yield through lactation." Thesis, Virginia Tech, 2018. http://hdl.handle.net/10919/96263.

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Increasing the milking frequency of early lactation dairy cows increases their milk yield, both during increased milking and after the cows are returned to a normal twice-daily milking schedule. When milked four times a day (4X) for only the first twenty-one days of lactation, the right udder half produces 3 kg/d more milk than the left half, which is milked only two times a day (2X) over the course of lactation (Hale et al., 2003). Alterations to this increased milking frequency (IMF) approach have been investigated in order to maximize production of the animals and determine the most effic
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4

Puthenparampil, Alex Abraham. "Effects of Milking Frequency on Milk Yield, Composition and Indices of Mammary Gland Metabolism in Lactating Dairy Cows." Thesis, The University of Arizona, 2009. http://hdl.handle.net/10150/193425.

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Six primiparous Holstein cows were assigned to a half udder design (n=6) 40 days prior to parturition. Beginning at parturition, one udder half was milked once daily (24hr interval) and the other four times daily (6hr interval). Udder halves were biopsied at days 15, 60, 120, and 230 of lactation for mammary tissue to perform mitochondrial staining and apoptosis studies. Increasing the milking frequency from 1x to 4x elevated the 4x udder half milk yield at early (d1-45) (P<0.0001), mid (d46-150) (P<0.0001) and late (d151-230) (P<0.0001) lactation. Milk protein percent (P= 0.013), lactose perc
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5

Melin, Martin. "Optimising cow traffic in automatic milking systems : with emphasis on feeding patterns, cow welfare and productivity /." Uppsala : Dept. of Animal Nutrition and Management, Swedish University of Agricultural Sciences, 2005. http://epsilon.slu.se/200563.pdf.

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6

Österman, Sara. "Extended calving interval and increased milking frequency in dairy cows : effects on productivity and welfare /." Uppsala : Dept. of Animal Nutrition and Management, Swedish Univ. of Agricultural Sciences, 2003. http://epsilon.slu.se/a383.pdf.

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7

Gott, Paige N. "Impact of milk cessation method on intramammary infections at calving and milk yield and quality in the subsequent lactation." The Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1449095578.

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8

Salama, Ahmed A. K. (Ahmed Abdel-Rahman Kamal). "Modifying the Lactation Curve in Dairy Goats: Effects of Milking Frequency, Dry Period, and Kidding Interval." Doctoral thesis, Universitat Autònoma de Barcelona, 2005. http://hdl.handle.net/10803/5668.

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Se utilizaron 79 cabras Murciano-Granadinas en 4 experimentos para estudiar los efectos de la frecuencia de ordeño, la omisión del secado y el intervalo entre partos sobre la producción de leche. En el Exp.1, 32 cabras se ordeñaron una (1X, n=17) o dos veces diarias (2X). 1X redujo la leche un 18% respecto a 2X, siendo la reducción mayor al principio de lactación. Las cabras de <4 partos perdieron mas leche que las >4 partos en 1X. La leche de las cabras 1X contuvo mas sólidos totales, grasa y caseína que la leche de las cabras 2X, aunque el porcentaje de proteína y el RCS no varió. En el Exp
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9

Reyes, Sánchez Nadir. "Moringa oleifera and Cratylia argentea : potential fodder species for ruminants in Nicaragua /." Uppsala : Dept. of Animal Nutrition and Management, Swedish University of Agricultural Sciences, 2006. http://epsilon.slu.se/200601.pdf.

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10

Vanbergue, Élise. "Les facteurs de variations de la lipolyse spontanée du lait de vache et mécanismes biochimiques associés." Thesis, Rennes, Agrocampus Ouest, 2017. http://www.theses.fr/2017NSARB291/document.

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La lipolyse est une réaction enzymatique qui influence négativement les qualités organoleptiques et technologiques du lait. La lipolyse spontanée (LS) correspond à la part de la lipolyse qui dépend de l’animal et du système d’élevage. La LS résulte de l’action de la lipoprotéine lipase (LPL) et de ses cofacteurs sur les globules gras (GG). L’objectif de la thèse a été de comprendre les variations de LS à l’échelle zootechnique et à l’échelle du lait. Les vaches (VL) ont pu être classées en 2 groupes selon leur phénotype : « susceptible » et « non susceptible » à la LS, confirmant l’importance
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11

Krauß, Michael. "The Influence of Management Strategies on the Water Productivity in Dairy Farming and Broiler Production." Doctoral thesis, Humboldt-Universität zu Berlin, 2017. http://dx.doi.org/10.18452/18560.

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Die Wasserproduktivität in der Tierhaltung ist von vielen Faktoren abhängig. Die Futterproduktion hat den größten Anteil am Wasserbedarf von tierischen Produkten. Weitere Einflussfaktoren sind die Leistung, die Reproduktion und der Gesundheitsstatus der Tiere, das Management und die Haltungsbedingungen. In dieser Arbeit sollte untersucht werden, wie sich diese Faktoren auf die Wasserproduktivität von Milch und Geflügelfleisch in Nord-Ost-Deutschland auswirken. Zehn unterschiedliche Futtermittel wurden hinsichtlich ihres Wasserbedarfes untersucht. Aus diesen Futtermitteln wurden die Rationen fü
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12

Shabangu, Nomthandazo Petronella. "Milk yield and quality, nitrogen metabolism and rumen fermentation parameters in dairy cows fed different level of dietary concentrate and live yeast." Diss., 2015. http://hdl.handle.net/11602/624.

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MSCAGR (Animal Science)<br>Department of Animal Science<br>The overall objective of this study was to investigate the effects of level of dietary concentrate and live yeast (LY) on milk yield, milk composition, rumen fermentation and nitrogen metabolism in lactating dairy cows. Four primiparous Holstein dairy cows in early lactation (average weight 500 ±9 kg and 20 days in milk (DIM)) were used in a 4 x 4 Latin Square design for a period of 44 days. The animals had seven days of adaptation to the treatments and four days for measurements. The treatments were, Low concentrate to forage (C:F) di
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13

VRBOVÁ, Aneta. "PLODNOST KRAV CHOVANÝCH V TECHNOLOGIÍCH S AUTOMATIZOVANÝM DOJENÍM." Master's thesis, 2012. http://www.nusl.cz/ntk/nusl-136831.

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level of cattle breeding is putting growing demands on milk production and it is closely related with fertility. The aim of this work was based on data analysis to determine fertility of dairy cows bred in modern technology in the context of the quality of nutrition, stabling and milk production and determine the level of the relationship between fertility and milk production. Monitoring herds proceeded in two breeds from May 2010 to December 2011. The data was obtained from the reports for monitoring performance, and the accompanying sheets cattle and T4C program (Time for Cows), which record
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14

Shen, Pai-Han, and 沈培華. "Association of Growth Hormone Genotype, Mitochondrial DNA D-loop Genotype, and Milking Speed with Milk Yield and Quality in Dairy Cow." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/57233649314650575641.

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碩士<br>國立屏東科技大學<br>畜產系所<br>96<br>The purpose of this study was to study the effects of bovine growth hormone gene (bGH), mitochondrial DNA (mtDNA) D-loop polymorphisms, and milking speed (MS) on milking performances of Holstein cattle in Taiwan. Milking procedure is one of the important sections in dairy cattle management. Furthermore, quantity and quality improvement, as well as cost reduction are the final goals of dairy industry. A total of 279 Holstein cows were genotyped for bGH-intron 3-T1557C point mutation using PCR-RFLP via MspI enzyme, and furthered evaluated for milking performanc
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15

KOZELKOVÁ, Jitka. "VLIV POČTU DOJENÍ NA UŽITKOVOST A PLODNOST PLEMENIC DOJENÝCH POMOCÍ ROBOTŮ." Master's thesis, 2011. http://www.nusl.cz/ntk/nusl-52792.

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The aim of this thesis was to analyze the effect of milking frequency per day on milk efficiency and fertility during the course of lactation. The observation of dairy Holstein cattle herd took place in agricultural company Brloh (Blanský les Region) from January 2010 to February 2011. There were observed 55 dairy cows: Holstein cattle (75 %), share cross cows with race Czech Pied cattle (22 %) and Fleckvieh cattle (3%). Microsoft Excel has been used for processing the statistic data. For results evaluation, some basic statistic characteristics have been counted. Differences between the groups
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