Assessment of the Adaptive Stability of the Holstein Cows in the Conditions of the Ecological Plasticity in Northern Steppe of Ukraine (original) (raw)
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Polish Journal of Natural Science, 2010
The cows were divided into three groups, based on herd size: group I of up to 20 cows, group II of 21-50 cows and group III of more than 50 cows. Additional criteria for the above division were the number of successive 305-day lactations and full lactations as well as the length of inter-calving intervals. The objective of this study was to determine the effect of herd size on the yield and proximate composition of milk in active cattle populations in farms in northeastern Poland over a ten-year period, taking into account lactations of normal length and full lactations, inter-calving interval (ICI) duration and lifetime cow productivity. The average yield over 305-day lactations was 6579 kg milk (6723 kg FCM), 273 kg fat (4.15%), 213 kg protein (3.24%), 309 kg lactose (4.70%) and 841 kg dry matter (12.78%). Cows in the largest herds (> 50 head) were characterized by the highest productivity, and cows in the smallest herds (≤ 20 head)-by the lowest. The latter produced milk with the highest fat content (4.16%) and the lowest protein content (3.21%). In herds comprising more than 50 animals, cows with the longest ICI (> 525 days) were marked by the highest milk production in full lactations (11 010 kg). As regards lifetime productivity, the highest values were noted in cows used for 3.44 years in the smallest herds (19 809 kg milk). In the largest herds cows were used for the shortest period of time (3.31 years), and their lifetime productivity reached 17 185 kg milk.
QUANTITATIVE AND QUALITATIVE STUDY OF MILK PRODUCTION OF GRAY STEPPE CATTLE IN ROMANIA
Researches were carried out on a number of 122 Grey Steppe breed females grouped into 8 groups: 3 groups in cattle unit increase: SCDCB Dancu Iasi (38 heads), USAMV Cluj (4 heads), Roua-Group Ialomiţa (3 heads), and 5 lots in Neamt population households (Tazlău - 6 heads, Tupilaţi-7 heads) and Tulcea (39 heads in Chilia Veche, Letea -18 heads and Pardina -7 heads), aiming the mean quantitative and qualitative of characters milk production. Data were exctracted of primary records of farms and direct measurements being statistically processed using SPSS 19 program, and statistical significance was done using ANOVA test. Quantitative milk production in cows Grey Steppe is now higher than in the production of this breed highlighted in studies over time, so the value of 1244 kg milk, registered in 1961, today it amounts to more than 2000 kg milk, which shows the high potential of this breed on milk production, modest to specialized breeds in milk production and even mixed. The average percentage of fat present values between 4.48 and 4.63% in specialized units and values less than 4.15 to 4.33% in the household population with significant statistical differences between values.
Relationship between production and reproduction traits dairy cows of Slovak spotted breed
SUMMARY: The aim this work was to evaluate relationships between production and reproduction traits in herds of Slovak spotted breed in the period 1990-2010 the results for 6 938 cows: milk, fat and proteins in kg and reproduction traits: age at first, second, third calving and calving interval. The basic statistic analysis were analysed using the SAS version 9.1. In the first lactation of dairy cows produced 4 003.5 kg of milk, 170.9 kg of fat and 133.3 kg of proteins. An increase of traits milk production in the second lactation was 11.3 - 12.1 % for milk traits. In the third lactation a slight increase in traits of milk production was achieved in comparison with the previous one, with a range of 4.6 % - 5.6 %. Mean age at first, second and third calving in data set were 945.0, 1 348.3 and 1 748.6 days. Average length between first and second calving was 415.5 days and between second and third calving was 408.3 days. Results of relation between kgs of milk by groups were higher va...
Milk Production in Commercial Cattle Dairy Farms in Kosova
2009
A study research was carried out in comercial dairy farms in Kosovo with the aim to contribute to the understanding of the situation of milk production and factors affecting milk productivity. Seventeen dairy cattle farms were selected for the study. The fresh milk samples were collected and record analyses were done according to the International Committee for Animal Recording using the A4 standard method, and were carried out from August 2007 till September 2008. Meanwhile, 4694 milk samples from 461 individual cows were collected. Depending on the cow breed, daily milk yield was very different (P < 0.0001) ranging from 18.92 0.22 to 12.34 0.53. Effect of the farm and lactation number was also very significant (P < 0.0001), showing that there are huge managment variation from farm to farm (for about 14.87 kg/day) and during different lactations (16.91 0.26 to 18.43 0.24 kg/day). According to this study, although in generaly milk yield was very much constant, in some months o...
The aim this work was to evaluate relationships between traits of milk production and reproduction traits in breeding herds of Slovak spotted breed in the period 1992-2010 the results for 10 514 Slovak cows. The basic statistic analysis were analysed using the SAS version 9.1. In the first lactation of dairy cows produced 4 685.18 kg of milk, 193.82 kg of fat and 156.51 kg of proteins. Correlation between evaluated traits of milk production and age at first calving were lower negative and statistically high significant (P<0.0001), scilicet between kgs of milk age at first calving = - 0.06731and correlation between milk in kg with calving interval 1 (r= - 0.06945) and with calving interval 2 (r= - 0.04554) were statistically high significant (P<0.0001). The analyses by the effect on age of first calving was the highest effect of HYS R2= 0.4478 and on calving interval was the highest effect of HYS R2= 0.1526.
2020
The study aimed to examine the analyses a chosen group of the Slovak Spotted dairy cows. Within the group we focused on the problematic of utility pointers evaluation, we analysed the milk production of various breed types, years of birth giving, paternity of the descendants and the order of lactation. Moreover, we assessed the mutual correlation dependence between milk production pointers and weight of various factors on milk, fats, proteins and lactose production. The highest amount of produced milk in kg due to breed type measure was in S0 type. Evaluating the year of birth giving, the milk production was the highest between the years of 2010-2016 in a herd of dairy cows at farm reaching 8,341 kg of milk. Milk production pointers such as milk production in kg, fats in kg, proteins in kg and lactose in kg are in a mutual correlation relationship that is highly statistically resulted P ≤ 0.001.
2015
Lithuanian farm animal genetic resources have a selective, economic, scientific, ecological, cultural, and historical importance to the Republic of Lithuania, and are an important part of global biodiversity. In Lithuania, now we have more than 20 cattle breeds of which 4 breeds are local: Lithuanian Black and White, Lithuanian Red (modern breeds), Lithuanian Light Grey and Lithuanian White Backed (indigenous). However due to the rapid agricultural development, highly productive and specialized cattle supplanted local breeds, which appeared on the verge of extinction. Only after forming relict gene-stocking herds and starting to breed by pure breeding, indigenous breeds were retained (Baltrėnaitė et al., 2003). As the old indigenous cattle breeds were poorly studied, our research was directed to analyze changes of reproductive performance and productivity parameters of indigenous, Lithuanian Light Grey and White Backed, cows. Data analysis showed that number of lactations of Light G...
Proceedings of the …, 2011
The increasing of cattle number from livestock ecosystems is a major objective in achieving feeding security of the human population. By the same time, the sustainable development of livestock is tightly linked to the protection, conservation and development of human useful animal species biodiversity. In this study are presented the comparative results from specialty literature about cows breading, depending on the exploitation technology and factors that influence milk production. By the same time, comparisons are made between the mode of cows maintenance at national and international level with existing conditions in Vrancea County in Romania, regarding the applicability of possible strategies of reorganization of exploitation technologies for milk cattle, according to race, ecological zone, size of holdings and form of property.