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The field experiments were carried out in 19941996 and were aimed at determining the nutritional value of mixtures containing Trifolium pratense L. + Lolium perenne L., Lolium multiflorum Lam., Lolium multiflorum Lam. var. westerwoldicum and Lolium x boucheanum Kunth. and Trifolium pratense L. + Festuca pratensis Huds.. Based on the botanical analysis, chemical composition and nutritional value,...
The study involved 113 emu eggs, laid by 4yrold hens kept by a Canadian breeder in Ontario. Those eggs which the shells had been damaged during transport were used for chemical assays to determine dry matter, protein, and fat contents in the yolk. The egg weight and shape index were determined as well.
Blood serum proteins of 36 males and 71 females of parental generation and of 516 progeny of various breeds of geese were separated by means of thinlayer, horizontal, alkaline polyacrylamide gel electrophoresis. In the subregion of slowmigrating prealbumin (PASG) in alkaline gel, ten different phenotypes were found. It was determined, both in the parents and the progeny, that the genes of a single,...
The study covered 97 Japanese quails of various genotypes of the protein referred to as preactin (PAK). The birds of AA genotype had a single, intensively stained, fastmigrating band; the BB genotypes had a single, slowmigrating, also intensively stained band, whereas the AB birds had two bands. The protein concentration, established basing on the area and height of peaks, was significantly higher...
The studies were carried out on 20 dairy cows assigned to two groups depending on their blood serum content of ketonic compounds. The cows of group I, which had subclinical ketosis, were administered Col press supplement to feed ration, whereas the cows of group II were the control group. Col press was applied from seven days before expected parturition through four weeks postpartum. In the blood...
Standard mineralvitamin premix (with 15 mg of Se and 150 mg of I) was applied to NKLohmann feed for the control group (C), and enriched premix, with doubled concentration of Se (30 mg·kg1) and I (300 mg·kg1), was fed to the experimental group (E) of Lohmann Brown laying hens in an egg production farm. The enriched premix contained also 50% more vitamin E (1500 mg·kg1). After four weeks of application...
The aim of this study was an analysis of the factors that influence body size and hair coat quality of standard minks (Mustela vison Sch.). The analysis covered 3837 animals belonging to three genetic groups: one domestic (native) and two groups of halfimports (one of the parents, sire, imported from Denmark or Holland).
The investigations were aimed at the determination of genetic distance among eight lines of laying hens kept in Poland and belonging to the following breeds: GreenLeg ZKF and Z11, Leghorn H22 and G99, Rhode Island Red RD2, YellowLeg Ż33, Polbar (Pb) and Sussex (Sx). The phenotype frequencies of fastmigrating prealbumin (PaF), eggyolk transferrin and ovalbumin (OvA), ovoglobulins: G3, G4 and...
The studies were carried out on the population of 14215 cows. The first lactation yield, in kg of FCM, significantly differentiated both the yields of subsequent lactations and the indices of life performance of the cows. In highproduction herds (with more than 5000 kg FCM), it is justifiable that the requirement should be met for heifer cows to reach the yield that would balance the costs of their...
The experimental group consisted of 57 young Holstein bulls kept in the Czech Republic; 35 bulls were tethered and 22 bulls were loose housed. The aim of the study was to analyse and compare the effect of different housing systems on feedlot performance, carcass value and meat quality and their mutual relationship. The overall average values were as follows: feedlot performance parameters live weight...
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