Repozytorium ZUT

Repozytorium ZUT jest cyfrową usługą, która gromadzi, przechowuje i udostępnia materiały cyfrowe utworzone przez społeczność akademicką Zachodniopomorskiego Uniwersytetu Technologicznego w Szczecinie




 

Najnowsze publikacje

PozycjaOpen Access
Effect of lactation number and average daily milk yield in complete lactation on the dry period length of Polish Holstein -Friesian cows
(Wydawnictwo Uczelniane Zachodniopomorskiego Uniwersytetu Technologicznego w Szczecinie, 2023) Salamończyk, Ewa; Siedlce University of Natural Sciences and Humanities, Faculty of Agrobioengineering and Animal Husbandry, Institute of Animal Science and Fisheries, Siedlce, Polan
The aim of the study was to determine the effect of average daily milk yield in complete lactation and lactation number in cows producing at least 8,500 kg of milk in 305-day lactation on the length of the dry period before the next lactation. A total of 1,965 complete, extended lactations in Polish Holstein-Friesian cows subject to use value assessment were analysed. The average complete-lactation daily milk yield was shown to influence the length of the dry period. The average dry period length was 44 days. Dry period length decreased in successive milk-yield groups, from 50 days (average daily yield up to 25 kg of milk) to 28 days (average daily yield over 35 kg in complete lactation). Thus it was confirmed that as milk yield increased, it was more difficult to end lactation. The shortest dry period (only 25 days) was recorded in the youngest cows (second and third lactation) with the highest average daily milk yield in complete lactation (>35 kg). In the oldest cows, i.e. those in their sixth lactation and higher, no statistically significant differences were shown in the length of the dry period depending on daily yield
PozycjaOpen Access
Grain yield and morphological characteristics of spring triticale plants as affected by cultivar as well as multinutrient fertiliser type and rate
(Wydawnictwo Uczelniane Zachodniopomorskiego Uniwersytetu Technologicznego w Szczecinie, 2023) Rzążewska, Emilia; Gąsiorowska, Barbara; Siedlce University of Natural Sciences and Humanities, Faculty of Agrobioengineering and Animal Husbandry, Institute of Agriculture and Horticulture, Siedlce, Poland; Vocational State School of IgnacyMościcki in Ciechanów, Faculty of Engineering and Economics, Ciechanów, Poland
A field experiment was conducted in Borki-Wyrki, Zbuczyn Gmina (commune), from 2017 to 2019. The objective was to assess yield performance and morphological characteristics of two spring triticale cultivars as affected by multinutrient fertiliser type and rate, the fertilisers being Polifoska 6 and Polifoska Krzem. Three experimental factors were tested: spring triticale cultivar – Milewo and Dublet, mineral fertiliser type – Polifoska 6 and Polifoska Krzem, and mineral fertiliser rate –0 kg∙ha−1, 140 kg∙ha−1, 280 kg∙ha−1, 420 kg∙ha−1. Spring triticale plant development and yield performance were significant affected by experimental factors, that is cultivar, fertiliser type and rate, were shown to influence these characteristics. Superior yields were produced by cv. Dublet compared with cv. Milewo. Cultivars fertilised with Polifoska Krzem produced higher grain yields than Polifoska 6. An increase in fertiliser rate was followed by higher grain yields. Spring triticale cultivar as well as multi-nutrient fertiliser type and rate significantly affected ear length. Significantly longer ears were developed by cv. Milewo. Longer ears were developed by cereal plants fertilised with Polifoska 6. Similarly, higher fertiliser rates had a beneficial effect on ear length. Fertiliser rate contributed to a significant increase in plant height compared with unamended control. Cv. Milewo plants were significantly higher than cv. Dublet plants.
PozycjaOpen Access
Nutritional problems of large and giant breed dogs. Part II. Adult dogs
(Wydawnictwo Uczelniane Zachodniopomorskiego Uniwersytetu Technologicznego w Szczecinie, 2023) Kępińska-Pacelik, Jagoda; Biel, Wioletta; Department of Monogastric Animal Sciences, Division of Animal Nutrition and Food, West Pomeranian University of Technology in Szczecin, Poland; Department of Monogastric Animal Sciences, Division of Animal Nutrition and Food, West Pomeranian University of Technology in Szczecin, Poland
The subject of dog nutrition is gaining popularity due to the growing awareness of the caregivers. Although there are foods dedicated to dogs of different breeds available on the market, caregivers relatively rarely wonder what they really differ from each other and what significance it has for animals. Many dogs are fed the same food for extended periods of time. The product designated as a complete/maintenance food is, according to legal regulations, balanced in such a way that it can be the only source of food for the animal, without leading to nutrient deficiencies. A dog’s digestive tract has not changed for hundreds of years, but the physiology of dog nutrition depends on the size of the breed. Dogs of small, medium, large and giant breeds, despite the fact that they belong to one species, have different nutritional needs. These differences must be taken into account in order to meet the needs as best as possible. The smaller the dog, the greater the digestive volume, and vice versa. The diet of large and giant breed dogs should be enriched with functional additives supporting the work of the joints. This need results from the fact that representatives of large and giant breeds, due to their size and large body weight, are particularly exposed to excessive strain on the elbows and hips.
PozycjaOpen Access
Polymorphism in the GHRL Gene and Milk Production Traitsin Jersey Cattle
(Wydawnictwo Uczelniane Zachodniopomorskiego Uniwersytetu Technologicznego w Szczecinie, 2023) Śpiewak, Magdalena; Kowalewska, Inga; Department of Genetics, Faculty of Biotechnology and Animal Breeding, West Pomeranian University of Technology, Szczecin, Poland; Department of Genetics, Faculty of Biotechnology and Animal Breeding, West Pomeranian University of Technology, Szczecin, Poland
The aim of this study was to assess potential relationships between GHRL 4491A˃G genotypes and selected milk production traits, including milk yield, protein and fat content, and protein and fat yield. The study involved 180 Jersey cows. Genotypes of individual animals were determined using the ACRS and PCR-RFLP methods. The allele frequencies were as follows: A – 0.98 and G – 0.02. The conducted research revealed statistically significant relationships (P ≤ 0.05) between GHRL genotypes and milk protein content, and tendencies were observed regarding the association of genotypeswith analyzed milk production traits.
PozycjaOpen Access
Monitoring Proposal of the Red Swamp Crayfish Procambarus clarkii (Girard, 1852)
(Wydawnictwo Uczelniane Zachodniopomorskiego Uniwersytetu Technologicznego w Szczecinie, 2023) Wróblewski , Paweł; Faculty of Animal Breeding, Bioengineering and Conservation, Warsaw University of Life Sciences, Warszawa, Poland
Invasive alien species are one of the major problems in Polish fauna and flora. They can displace native species and cause economic losses. Such animals as red swamp crayfish have a wide tolerance to changing living conditions, which means that their range of occurrence increases over time. The current area of red swamp crayfish in Poland includes several locations, but reports indicate that this species inhabits many other reservoirs. It is very important that the red swamp crayfish population is regularly monitored, which may limit the number of this crustacean in Polish waters.