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Ekologiczny chów kur jako czynnik kształtujący jakościowe cechy żółtka jaja

Gornowicz E., Lewko L., Szablewski T.

Journal of Research and Applications in Agricultural Engineering

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2013

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Vol. 58, nr 3

161--164

PL

Celem badań przeprowadzonych w Instytucie Zootechniki PIB była ocena jakości żółtek jaj konsumpcyjnych pochodzących od krajowych kur stad zachowawczych, utrzymywanych zgodnie z wymogami rolnictwa ekologicznego. Materiał badawczy stanowiły jaja pochodzące od kur czterech ras zachowawczych: sussex, rhode island red (RIR), żółtonóżka kuropatwiana i zielononóżka kuropatwiana. Przeprowadzone badania wykazały, iż jaja niosek utrzymywanych systemem ekologicznym charakteryzowały się żółtkami o cechach odpowiadających preferencjom konsumentów (intensywne i równomierne wybarwienie, mniejszy udział tłuszczu – żółtonóżka kuropatwiana). Parametry te są ważnym czynnikiem kształtującym popyt na jaja.

EN

The aim of the study conducted at the National Research Institute of Animal Production was to estimate the egg yolk quality from domestic conservative flocks of hens kept in accordance with the requirements of ecological farming. The research materials consisted of hen eggs from four conservative flocks: sussex, rhode island red (RIR), greenleg partridge, yellowleg partridge. Studies have shown that the characteristic of egg yolk of the birds kept in ecological system meet the expectations of consumers (intense and uniform colour, lower fat content - yellowleg partridge). These parameters are an important factor affecting the supply of eggs.

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Effect of heat stress on biochemical parameters of hens

Havlicek Z., Slama P.

Proceedings of ECOpole

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2011

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Vol. 5, No. 1

57--60

EN

The objective of this paper was to evaluate the effects of high temperatures on biochemical parameters of hens. Heat stress generally causes a decrease in feed intake. The hypothesis that feed intake, egg production, egg quality measures, acid-base status (pH, pCO2, HCO3 –) of hens would be influenced by the high temperature period was tested. Twenty four Isa Brown hens at 60 weeks of age were used in this experiment and hens were randomly separated into 2 equal groups. Each group contains 12 hens. First control group was housed at 20.1÷21.2°C and 60÷65% relative humidity. Experimental group was housed for 2 weeks at 20.5°C and 60÷65% relative humidity in experimental box, and then exposed to 27°C and 60% for 4 week, and then allowed to recover for 2 week at 20.5°C and 60% relative humidity. All production parameters and egg quality were significantly affected by heat stress. Feed intake during first week heat period was significantly reduced (18%). In three next weeks, feed intake was increasing with reduction 14.5%, 8% and 9.5%, respectively. Blood pH values were significantly lower from 3rd week of exposure. Blood pH had these values: 1st week 7.372, 2nd week 7.371, 3rd week 7.380 and 4th week 7.289.

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Rozwój krajobrazu kulturowego w otoczeniu jeziora Lednica na Wysoczyźnie Gnieźnieńskiej

Makohonienko M., Makowiecki D.

Landform Analysis

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2011

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Vol. 16

32-38

EN

The paper presents development of cultural landscape in Central Great Poland, in the Ostrów Lednicki settlement complex during the Early Medieval times in the light of vegetation history and faunal records. The destruction of hornbeam forests The differences in vegetation cover between areas of moraine upland and outwash plains was demonstrated. Archaeozoological studies showed the dominant role of pig and cattle in the Early Medieval animal economy. Relatively high representation of hare remains among wild animals, corresponds with palaeobotanical data and confirms the dominance of open, cultural landscape

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Charakterystyka frakcji fosfolipidowych izolowanych z żółtek jaj pochodzących od kur Lohmann Brown i zielononóżki kuropatwianej

Gładkowski W., Chojnacka A., Kiełbowicz G., Pisarski B., Trziszka T., Wawrzeńczyk C.

Przemysł Chemiczny

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2009

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T. 88, nr 5

432-435