Tag Archives: milk yield

xxx S. Skuja, V. Antāne and I. Lūsis
Effects of retained fetal membranes treatments and dry period length on the subsequent lactation in cows – milk yield and somatic cell count
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Effects of retained fetal membranes treatments and dry period length on the subsequent lactation in cows – milk yield and somatic cell count

S. Skuja*, V. Antāne and I. Lūsis

Latvia University of Life Sciences and Technologies, Faculty of Veterinary Medicine, Kr. Helmaņa 8, LV3004 Jelgava, Latvia *Correspondence: santa.skuja0@gmail.com

Abstract:

Different treatment strategies in cows with retained fetal membranes (RFM) may affect subsequent lactation in various ways. Also, excessively short or long dry periods (DP) can decrease milk yield (MY), increase the risk of poor udder health, and increase the risk of RFM. This study aimed to evaluate how different treatment strategies of RFM affect subsequent lactation in cows, i.e., MY and udder health determined on the somatic cell count (SCC) bases in milk, expressed as somatic cell score (SCS). A secondary but equally important objective was to analyse the dry period length (DPL) effect on the subsequent lactation in cows. The cows from two herds were divided into three groups: group 1–healthy control; group 2–cows with RFM, removed manually and treated with intrauterine (IU) antibiotics (AB); group 3–cows with RFM, not removed, but treated IU with AB. The DP of cows was divided post factum into shortened (up to 46 days), traditional (47 to 70 days), or prolonged (over 70 days). Statistical analyses were performed using linear multiple regression and multivariate analyses. Differences were statistically significant when P <0.05. The effect of different RFM treatment strategies on MY and SCS was evaluated. There were no statistically significant effects of RFM treatments on the MY in the subsequent lactation. However, there was a tendency (P = 0.07) for SCS in standard lactation to be higher in cows in group 2. The highest economic losses, calculated from the decrease in MY, were detected in the same group. Significantly lower MY was observed in cows with a shortened DPL during the first 30 days PP (P <0.05). The DPL did not affect the SCS.

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640–649 N.A. Yurina,,, D.V. Osepchuk, M.P. Semenenko, E.V. Kuzminova and E.G. Chuprina
The study of new feed additives in the ration in newly-calved high producing cows
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The study of new feed additives in the ration in newly-calved high producing cows

N.A. Yurina¹,²,*, D.V. Osepchuk¹, M.P. Semenenko¹, E.V. Kuzminova¹ and E.G. Chuprina¹

¹Krasnodar Research Center for Animal Husbandry and Veterinary Medicine, Pervomaiskaya street 4, RU350055 Krasnodar, Russia
²Kuban State Agrarian University named after I.T. Trubilin, 13, Kalinina street, RU350000 Krasnodar, Russia

Abstract:

The paper highlights the results of a study on the combined use of the CattlePro Effect amido-vitamin-and-mineral complex and PassPro Ballans feed product in the diets of newlycalved high producing cows. The studies were carried out in the conditions of the Bolshevik collective farm of the Kalacheevsky district of the Voronezh region (Russia) according to the method of A.I. Ovsyannikov (1976) for three months after a 21-day equalizing period. During the course of the experiment, it was determined that the introduction of new feed additives into the diet leads to an increase in the consumption of dry matter by lactating animals by 1.0–6.2%. The basic fat content and protein content of milk was increased by 11.6–19.1%, and when adjusting the milk yield for 4% milk – by 9.3–17.4%. The digested feed particles in the feces were closer to normal in the cows of the experimental groups, which indicates the beneficial effect of the feed additive on the digestive processes of animals. When applying the studied feed additive, there was a certain decrease in enterobacteria and staphylococci in the samples of the rumen fluid and at the same time there was an increase in lactic acid microorganisms 1.6–2.0 times.

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1455-1462 D. Ruska, D. Jonkus and L. Cielava
Evaluation of feed conversion efficiency for different dairy cows breeds by milk yield, milk content and faecal amount
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Evaluation of feed conversion efficiency for different dairy cows breeds by milk yield, milk content and faecal amount

D. Ruska*, D. Jonkus and L. Cielava

Latvia University of Life Sciences and Technologies, Faculty of Agriculture, Institute of Animal Sciences, Liela street 2, LV-3001 Jelgava, Latvia
*Correspondence: diana.ruska@llu.lv

Abstract:

The objective of this study was to evaluation of feed conversion efficiency for Latvian Brown (LB) and Holstein Black and White (HM) dairy cows breeds to define optimal crude protein (CP) content in the feed. In the research study were completed three (A, B, C) dairy cows group (8 cows in each group) with LB and HM breed’s cows in the early lactation period, from 10 till 30 lactation days. Each groups cows were feeder with total mixed ration (TMR) with different CP content (approx. 18.0%, 17.5%, 17.0% accordingly). In the research period were controlled the amount of feed fed and regularly collected feed samples. After 21 days feeding was controlled milk yield, collected milk samples for content testing, and faecal amount and samples. Milk samples were analysed for fat, total protein (%) and urea content (mg dL-1). Milk samples for content parameters were analysed in an accredited milk quality laboratory. The statistical analyses were performed with the SPSS program package. The results acquired show that in all studied parameters were not significant differences between study groups. To evaluate the feed conversion efficiency during the study, we used the energy corrected milk (ECM) and the feed dry matter content during research and calculated the coefficient for each cow individually and on average in the study group. Milk yield, protein and faecal amount were significantly different among breeds. Milk urea content was average 28.5 mg dL-1 for all LB breed cows in all groups, for HM breeds it was 23.6 mg dL-1. These results show that LB breed cows did not converse feed proteins wholesome. Total milk and faecal amount were decreased in a group with CP 17% in feed by 10% and 7% accordingly. By using this data, the farmer may make evaluations and forecast of farming efficiency; cows breed preference and environmental threats.

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1203-1212 J. Chlebowski, M. Gaworski, T. Nowakowski and B. Matusiak vel Matuszewski
Association between body condition and production parameters of dairy cows in the experiment with use of BCS camera
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Association between body condition and production parameters of dairy cows in the experiment with use of BCS camera

J. Chlebowski¹*, M. Gaworski²*, T. Nowakowski¹ and B. Matusiak vel Matuszewski¹

¹Warsaw University of Life Sciences, Department of Biosystems Engineering, Nowoursynowska street 164, PL 02-787 Warsaw, Poland
²Warsaw University of Life Sciences, Department of Production Engineering, Nowoursynowska street 164, PL 02-787 Warsaw, Poland
*Correspondence: jaroslaw_chlebowski@sggw.pl; marek_gaworski@sggw.pl

Abstract:

Dairy production effectiveness in the farm depends on many technical, technological and biological factors. State of the dairy cow condition constitutes one of the most important element in the assessment of dairy herd and production indices. Including access to modern technical solution to assess body condition of dairy cows, i.e. BCS camera, some results of observation in the herd with 362 cows were collected to find any relationship between BCS index and milk yield per cow including 5 lactation groups and cows differed in age as well as four seasons. Basing on data collected in the period of 11 months it was found that cows with the BCS index lower than 2.9 showed the highest daily milk production. Increase in BCS index was associated with decrease in amount of produced milk per day. The statistical analysis showed significant effect of lactation period, age of animals and season on BCS results in the considered dairy cow production cycle.

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241-247 A. Laurs and J. Priekulis
Robotic milking of dairy cows
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Robotic milking of dairy cows

A. Laurs and J. Priekulis

Institute of Agricultural Engineering, Latvia University of Agriculture,J. Čakstes bulv.5, LV3001, Jelgava, Latvia; e-mail: armins.laurs@promedia.lv

Abstract:

In countries with developed dairy farming milking robots are gaining wide popularity. The first milking equipment of this kind was installed in Latvia in 2007 and found interest among partitioning animal breeders and among scientists. The main feature of the milking robots is that cows can be milked independently, without human assistance and “on demand”. The aim of our research was to state how often the cows visited the robots, and to compare the load (capacity) and quality of the obtained milk to traditional milking equipment. In our experiments, the cows visited the robots 2.9 times a day, on average. Two robots that served a group of 73 cows were loaded to 65%. Therefore, the capacity can be enlarged to 110 cows. With the use of robots, milk quality indices were higher than milking with stall-type equipment with parallel location of animals.

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