The Effect of Production System on Fatty Acid Composition in Beef Meat of Cika Young Bulls

The aim of the study was to determine chemical and fatty acid composition in meat of Cika bulls fattened in two production systems. Eight bulls were semi-intensively fattened with a total mix ratio (TMR), while ten were grazed without cereals supplementation. Housed bulls were slaughtered at the age of 20.0 months while grazed bulls were slaughtered at the age of 23.5 months. Samples of M. longissimus dorsi located between the 7th and 8th rib were used to determine the chemical and fatty acid composition. Data were analysed using the GLM procedure of the SAS/ STAT. Model 1 was used to test the effect of production system on the chemical composition of meat. Model 2 was used to test the effects of production system and the intramuscular fat content nested within the production system as linear regression on the fatty acid composition. Significant differences were determined in intramuscular fat (14.54 vs. 8.57 g/kg, P = 0.015) and in dry matter content (231.85 vs. 239.49 g/kg, P = 0.032) in beef meat of TMR fed and in grazed bulls, respectively. Beef meat of grazed bulls contained significantly lower palmitic acid (19.87 vs. 21.03 wt.%, P = 0.002), oleic acid (26.18 vs. 30.01 wt.%, P = 0.007) and MUFA (29.88 vs. 33.80 wt.%, P = 0.010) and higher α-linolenic (3.33 vs. 1.45 wt.%, P = 0.014), EPA (1.40 vs. 0.57 wt.%, P = 0.002), DPA (1.84 vs. 1.06 wt.%, P = 0.001), PUFA (21.42 vs. 19.43 wt.%, P = 0.047) and n-3PUFA (6.80 vs. 3.24 wt.%, P = 0.001) compared to TMR fed bulls

VPLIV KRMI DODANEGA SELENA NA NJEGOVO VSEBNOST V TKIVIH IN NA RAST KUNCEV

U krmnu smjesu koju su dobivale ženke bijele novozelandske pasmine u zadnjem tjednu bređosti i u laktaciji, što je već sadržavala 0.194 ppm selena (K), dodato je 0.1 (A), odnosno 0.3 ppm (B) selena u obliku Na₂SeO₃. Dodatak selena u skupinama A i B pozitivno je utjecao na povećanje mase plodova u zadnjem tjednu bređosti (K=36.25 %, A=57.8% B=56.4%) te značajno na razvoj tjelesne mase mladih kunića u skupini A (K = 343.6 g, A = 436.2 g, B = 373.5 g). Sadržaj selena u krvi majke u drugom tjednu pao je na najnižu razinu, u trećem tjednu premašio je vrijednosti prvog tjedna (K= 1.06/0.74/1.22, A = 0.94/0.93/1.12, B= 1.13/0.89/1.15 μg.g⁻¹ ST). U jetrima mladih kunića koncentracija selena na 21. dan bila je značajno veća u varijanti B (K= 1.97, A= 1.89, B= 2.18 μg.g⁻¹ ST), na 30. dan statistički je postupno rasla razmjerno s dodatkom selena (K= 1.95, A=2.20, B 2.54 μg.g⁻¹ ST). U bubrezima slika je bila manje jasna, u usporedbi s vrijednostima u jetrima utvrđene su više koncentracije selena, najviša pak na 30 dan u skupini B (3.22μg.g⁻¹ ST).0.1(A) and 0.3 ppm (B) respectively of selenium in the form of Na₂SeO₃ were added to the feed mixuter that was fed to female New Zealand White rabbits in the final stage of gestation and in lactation period. The addition of selenium in groups A and B had a positive effect on the increase of body mass of fetuses in the last week of gestation (K=36.25%, A=57.8%, B=56.4 %) and a significant effect on the development of body mass in young rabbits in group A (K=343.6 g, A=436.2 g, B=373.5 g). The content of selenium in mother\u27s blood decreased in the second week to the lowest level, but in the third week it exceeded the values from the first week (K=1 .06/0.74) 1.22, A=0.94/0.93/1.2, B=1.13/0.89/1.15 μg.g⁻¹ DM). In the liver of young rabbits the concentration of selenium was significantly higher in group B (K=1.97, A=1.89, B=2.18 μ.g⁻¹ DM) at age 21 days, while at age 30 days it increased proportionally with the supply of selenium (K=1.95, A=2.20, B=2.54μ.g⁻¹ DM). ln kidneys the situation was not so clear since the concentration of selenium was higher in comparison with liver, and the highest value was determined at age 30 days in group B (3.22μg.g⁻¹ DM).V krmno mešanico, ki smo jo pokladali samicam pasme beli novozelandec v zadnjem tednu brejosti in v lakaciji in ki je že vsebovala 0.1 94 ppm selena (K), smo dodali 0.1 (A) oziroma 0.3 ppm (B) selena v obliki Na₂SeO₃. Dodatek selena je v skupinah A in B pozitivno vplival na povečanje mase zarodkov v zadnjem tednu brejosti (K=36.25%, A=57.8 %, 8=56.4 %) in značilno na razvoj telesne mase mladičev v skupini A (K=343.6 g, A=436.2 g, B=373.5 g). Vsebnost selena v krvi mater se je v drugem tednu znižala na najnižjo raven, v 3. tednu pa je presegla vrednosti 1. tedna (=1.06/0.74/1.22, A=0,94/ 0.93/1.12, B=1.13(0.89/1.15 μg.g⁻¹ SS). V jetrih mladičev je bila koncentracija selena na 21. dan značilno višji pri različiti B (K=1.97, A=1.89, B=2.18 μg.g⁻¹ SS), na 30. dan pa se je statistično stopnjevala sorazmerno z oskrbo s selena (K=1.95, A=2.20, B=2.54 μg.g⁻¹ SS). V ledvicah je bila slika manj jasna, v primjerjavi z vrednostmi v jetrih so bile ugotovljene višje koncentracije selena, najvišja pa na 30. dan v skupini B(3.22 μg.g⁻¹ SS)

Selenium uptake and Se compounds in Se-treated buckwheat

In field experiments, tartary buckwheat and hybrid buckwheat were foliarly sprayed with an aqueous solution of sodium selenate (20 mg Se L–1). In treated plants, the selenium content was significantly higher than in controls, irrespective of the plant part and taxon of buckwheat. The highest average Se concentrations in hybrid and tartary buckwheat were found in seeds. The main Se species found in seeds was Se methionine. Selenium-sprayed plants had higher photochemical efficiency of photosystem II in both taxa and higher electron transport system activity in hybrid buckwheat, suggesting a positive effect of Se on physiological characteristics. Because of the concentration of Se in both buckwheat taxa and selenomethionine as the dominant species of Se, Se-enriched buckwheat is a potential source of dietary Se for animals and humans

ODREĐIVANJE ŠEĆERA U SIROVINAMA ZA KRMNE SMEŠE I U KRMNIM SMEŠAMA

ESTABLISHING OF SUGAR INRAW MATERIALS FOR FEED MIXTURES AND IN FEED MIXTURE

The Effect of Production System on Fatty Acid Composition in Beef Meat of Cika Young Bulls

The aim of the study was to determine chemical and fatty acid composition in meat of Cika bulls fattened in two production systems. Eight bulls were semi-intensively fattened with a total mix ratio (TMR), while ten were grazed without cereals supplementation. Housed bulls were slaughtered at the age of 20.0 months while grazed bulls were slaughtered at the age of 23.5 months. Samples of M. longissimus dorsi located between the 7th and 8th rib were used to determine the chemical and fatty acid composition. Data were analysed using the GLM procedure of the SAS/ STAT. Model 1 was used to test the effect of production system on the chemical composition of meat. Model 2 was used to test the effects of production system and the intramuscular fat content nested within the production system as linear regression on the fatty acid composition. Significant differences were determined in intramuscular fat (14.54 vs. 8.57 g/kg, P = 0.015) and in dry matter content (231.85 vs. 239.49 g/kg, P = 0.032) in beef meat of TMR fed and in grazed bulls, respectively. Beef meat of grazed bulls contained significantly lower palmitic acid (19.87 vs. 21.03 wt.%, P = 0.002), oleic acid (26.18 vs. 30.01 wt.%, P = 0.007) and MUFA (29.88 vs. 33.80 wt.%, P = 0.010) and higher α-linolenic (3.33 vs. 1.45 wt.%, P = 0.014), EPA (1.40 vs. 0.57 wt.%, P = 0.002), DPA (1.84 vs. 1.06 wt.%, P = 0.001), PUFA (21.42 vs. 19.43 wt.%, P = 0.047) and n-3PUFA (6.80 vs. 3.24 wt.%, P = 0.001) compared to TMR fed bulls