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Balice, Poland

Sokolowicz Z.,University of Rzeszow | Krawczyk J.,Dzial Ochrony Zasobow Genetycznych Zwierzat | Herbut E.,Dzial Technologii
Zywnosc. Nauka. Technologia. Jakosc/Food. Science Technology. Quality | Year: 2012

The objective of the research study was to determine the effect of layers' age on the development of quality traits of eggs from native Greenleg Partridge [Z-11] hens reared under the organic breeding conditions. The quality of consumption eggs from layers aged 36, 50, and 80 weeks was investigated. It was found that the layers' age had an effect on the increased egg and yolk weight as well as on the increased content of egg yolk and the decreased content of egg albumen in the eggs analyzed. The intensity of yolk colour increased with age of the layers. In the egg yolks from older hens, the content of vitamins A and E was higher than in the egg yolk from the younger layers. The physical features of egg shells from older layers indicated their good quality. The age was found to have no effect on the profile of fatty acids in the egg yolks. The good quality of eggs from the older Greenleg Partridge layers proves that it is reasonably and practically to utilize them in the organic breeding system during a period of two years.

Walczak J.,Dzial Technologii | Herbut E.,Dzial Technologii | Krawczyk W.,Dzial Technologii
Przemysl Chemiczny | Year: 2011

Emission of CH4, CO2 and NOx from cattle farming (136 cows, heifers and calves) were detd. by gas chromatog. and by using electrochem. and IR probes. The emissions depended on the bedding system. The highest CH4 emission was obsd. for deep sawdust bedding, the highest CO2emission for slated floor system and the highest NOx emission for beddingless system. The emissions were lower than given in the literature.

Krawczyk W.,Dzial Technologii | Herbut E.,Dzial Technologii | Walczak J.,Dzial Technologii
Przemysl Chemiczny | Year: 2011

Pure chicken manure and the manure mixed with wheat straw were stored in atm. air for 3 months in summer (July-September) and 3 months in winter (January-March) to follow the NH3 emission and changes in chem. compn. of the manures. The straw addn. resulted in a decrease in the NH 3 emission esp. in winter.

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