Autor: Nogalski, Z. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Assessment of the nutritional value of Sida hermaphrodita (L.) Rusby (Virginia fanpetals): chemical composition of herbage and silage
Autorzy:: Borsuk, M.
Purwin, C.
Baranowska, M.
Antoszkiewicz, Z.
Nogalski, Z.
Mazur-Kusnirek, M.
Powiązania:: https://bibliotekanauki.pl/articles/1192717.pdf
Data publikacji:: 2021
Wydawca:: Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Tematy:: Sida hermaphrodita
Virginia fanpetals
herbage
silage
chemical composition
nutritional value
polyphenols
amino acids composition
Opis:: Sida hermaphrodita as a crop plant could be used as raw material for the production of forage. The aim of this study was to evaluate the overall nutritional value of fresh and ensiled biomass of Sida hermaphrodita, harvested in the bud formation stage. The chemical and amino acid composition, fatty acid profile, concentrations of minerals and polyphenols of herbage and silage were determined. Additionally fermentation products were assessed in silage. Herbage contained crude protein (CP) of 182 g kg-1 dry matter (DM), neutral detergent fiber (NDF) of 375 g kg-1 DM and lignin content in NDF (L/NDF) was 8.88. Nitrogen fractions changed as a result of ensiling (P<0.010), non-protein nitrogen (NPN) from 274 g kg-1 total nitrogen (TN) in herbage to 683 g kg-1 TN in silage, and neutral detergent-insoluble nitrogen (NDIN) from 74.6 g kg-1 TN in herbage to 79.5 g kg-1 TN in silage. Silage was characterized by intensive lactic fermentation (114 g kg-1 DM) and pH of 4.30. It contained CP of 176 g kg-1 DM, NDF of 378 g kg-1 DM, and L/NDF (11.3) was higher than in the herbage. The CP of Sida hermaphrodita silage had a high content of essential amino acids (AAs) Lys, Thr, Val, Leu and Phe (3.98, 4.19, 4.55, 7.14 and 4.00 g 100 g-1 CP, respectively). Sida hermaphrodita silage was characterized by the highest K (6.262 g kg-1DM) content among macronutrients, and the highest content of Fe (40.88 mg kg-1 DM) and Mn (33.01 mg kg-1 DM) among micronutrients. Polyunsaturated fatty acids (PUFAs) predominated in the ether extract herbage and silage, and their proportion was three-fold and seven-fold higher than the proportion of monounsaturated fatty acids (MUFAs), respectively. Herbage had high quercetin content (652 µg g-1 DM), which decreased by 45% during the ensiling. Changes in the chemical composition suggest that this crop plant can be preserved by ensiling. The results of this study indicate that Sida hermaphrodita can be used for producing high-quality silage for ruminants.
Źródło:: Journal of Elementology; 2021, 26, 1; 249-260
1644-2296
Pojawia się w:: Journal of Elementology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Wartość rzeźna wolców mieszańców mięsnych w zależności od intensywności opasu i wieku zwierząt w momencie uboju
Slaughter value of crossbred beef steers as depending on fattening intensity and slaughter age of animals
Autorzy:: Nogalski, Z.
Pogorzelska-Przybylek, P.
Wielgosz-Groth, Z.
Sobczuk-Szul, M.
Purwin, C.
Winarski, R.
Niedzwiedz, J.
Powiązania:: https://bibliotekanauki.pl/articles/827829.pdf
Data publikacji:: 2013
Wydawca:: Polskie Towarzystwo Technologów Żywności
Opis:: Wolce, w porównaniu z buhajkami, wolniej przyrastają i gorzej wykorzystują pasze, ale ich mięso zawiera więcej tłuszczu śródmięśniowego, jest jaśniejsze, bardziej kruche i charakteryzuje się większą wodochłonnością. Celem podjętych badań było określenie wpływu intensywności opasu oraz wieku zwierząt w momencie uboju na wartość rzeźną wolców mieszańców mięsnych uzyskanych z krzyżowania krów rasy polskiej holsztyńsko-fryzyjskiej z buhajami rasy limousine. Wolce opasano intensywnie do wieku 15 lub 18 miesięcy i półintensywnie do wieku 18 lub 21 miesięcy. Najcenniejsze tusze uzyskano z wolców opasanych intensywnie do wieku 18 miesięcy. Charakteryzowały się one najwyższą masą tuszy (321,1 kg) i dobrym jej uformowaniem (klasa R systemu EUROP) oraz największą masą pięciu najcenniejszych wyrębów (104,69 kg). Mięso tych zwierząt zawierało najwięcej tłuszczu śródmięśniowego (4,71 %), co odpowiada zmieniającym się preferencjom konsumentów. Ponadto wykazano, że opas wolców do wieku 21 miesięcy wiąże się ze wzrostem otłuszczenia tusz i znaczącym zmniejszeniem udziału najcenniejszych wyrębów w tuszy.
Steers, in comparison with bulls, grow slower and poorer covert feed, but their meat contains more intramuscular fat and its colour is lighter; it is more tender and characterized by a higher water-holding capacity. The objective of this research study was to determine the effect of fattening system and age at slaughter on the slaughter value of 46 crossbred beef steers produced by mating Polish Holstein-Friesian cows with Limousine bulls. The steers were fattened intensively to the age of 15 or 18 months, and semiintensively to the age of 18 or 21 months. The most valuable carcasses were produced from steers fattened intensively to the age of 18 months. They were characterized by the highest weight (321.1 kg), the best conformation (R class in the EUROP system), and the highest weight of their five most valuable cuts (104.69 kg). The meat of those animals had the highest intramuscular fat content (4.71%), and this fact meets the changing preferences of consumers. In addition, it was proved that the fattening of the steers to the age of 21 months was associated with an increase in the carcass fatness and with a significant decrease in the per cent content of the most valuable cuts from carcass.
Źródło:: Żywność Nauka Technologia Jakość; 2013, 20, 3
1425-6959
Pojawia się w:: Żywność Nauka Technologia Jakość
Dostawca treści:: Biblioteka Nauki

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Tytuł:: The effect of grass silage quality and supplementary concentrate levels on feed intake and fattening performance of crossbred steers
Autorzy:: Purwin, C.
Wyżlic, I.
Nogalski, Z.
Sobczuk-Szul, M.
Pogorzelska-Przybyłek, P.
Lipiński, K.
Wierzbowska, J.
Starczewski, M.
Michalski, J. P.
Powiązania:: https://bibliotekanauki.pl/articles/962834.pdf
Data publikacji:: 2016
Wydawca:: Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Opis:: Grass silage is the basic component of diets for winter or year-round feeding of beef cattle in Central and Northern Europe, but its quality can vary considerably. The aim of this study was to determine whether the quality of silage influences the fattening performance of crossbred steers and whether higher intake of supplementary concentrate improves performance in steers fed silage of lower quality. The experiment was conducted on 52 crossbred steers with the initial body weight of 300 kg, produced by crossing Polish Holstein-Friesian dairy cows with Charolais, Limousin and Hereford bulls. The animals had ad libitum access to one of two types of grass silages (of higher and lower quality), and silage intake was recorded individually. Supplementary concentrate consisted of crimped triticale grain (785 g kg-1), rapeseed meal (190 g kg-1) and a mineral-vitamin premix for beef cattle (25 g kg-1). Concentrate was administered at two levels of 1.9 and 2.4 kg dry matter per day. The animals were housed in a free-stall system and feed intake was recorded individually. The fattening period lasted 65 days. Live weight gains were higher (P < 0.0001) in the group of steers fed high feed value grass silage than in the group administered low feed value grass silage. Steers fed silage supplemented with a higher level of concentrate were characterized by higher live weight gains (P < 0.0001) than those receiving silage with a lower level of concentrate. Average daily gains were similar in steers fed lower-quality silage with a higher level of concentrate and in those offered higher-quality silage with a lower level of concentrate (0.972 and 0.975 kg, respectively). It can be concluded that a comparable level of fattening performance can be achieved in steers fed low feed value silage supplemented with a higher amount of concentrate and in animals receiving high feed value silage supplemented with a lower amount of concentrate.
Źródło:: Journal of Elementology; 2016, 21, 4
1644-2296
Pojawia się w:: Journal of Elementology
Dostawca treści:: Biblioteka Nauki

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