Įvairių konservantų palyginamieji tyrimai

Santr. anglVytauto Didžiojo universitetasŽemės ūkio akademij

Air Protection and Cows Welfare in Uninsulated Building

Santr. anglBibliogr.: p. 317 (2 pavad.)Vytauto Didžiojo universitetasŽemės ūkio akademij

Микроклимат и гигиена неутепленного коровника

Bibliogr.: p. 253 (5 pavad.)Vytauto Didžiojo universitetasŽemės ūkio akademij

Neapšiltintos karvidės mikroklimatas ir sanitarija

Santr. angl., rusBibliogr.: p. 67-68 (9 pavad.)Vytauto Didžiojo universitetasŽemės ūkio akademij

Fusarium and Aspergillus mycotoxins effects on dairy cow health, performance and the efficacy of Anti-Mycotoxin Additive

One hundred two samples of feeds made in Lithuania, which included maize silage, grass-legume silage, hay and ensiled crimped maize were investigated during 2008-2012 for contamination with some mycotoxins. The highest concentrations of mycotoxins determined were those of deoxynivalenol (DON) – 471.0 μg/kg and aflatoxin B1 (AFB1) – 21.2 μg/kg in ryegrass silage from bales, and zearalenone (ZEA) – 625.0 μg/kg in maize silage from trenches. The present study has been carried out based on these data because animal feeds contaminated with mycotoxins can cause reduced productivity of dairy cows and health disorders in the long term. The aim of this study was to investigate the long-term exposure of toxic effects of a diet naturally contaminated with low concentrations of mycotoxins on milk composition and biochemical, hematological, immunological parameters of dairy cows and to determine the anti-mycotoxin effect of Mycofix Plus 3.E. Twenty eight clinically healthy, medium productive Lithuanian Red cows were selected. ZEA was a major contaminant found in the corn silage at concentration levels of up to 1000.0 μg/kg of dry matter. DON was the second major found in the hay at concentration levels of up to 600.0 μg/kg of dry matter. The highest concentration AFB1- 10.0 μg/kg was determined in ground barley. The Anti-Mycotoxin Additive (AMA) Mycofix Plus 3.E was given individually to 14 cows at a concentration of 40.0 g daily for 9 weeks. The present results indicate that feeds naturally contaminated with low concentration of mycotoxins produced by Fusarium spp. and Aspergillus spp. in a diet of dairy cows can have a negative influence on somatic cell count, blood parameters and immunity. The addition of an Anti-Mycotoxin Additive (Mycofix Plus 3.E) to diet of dairy cows can prevent many of these effects

Galvijų laikymas šaltuose tvartuose

Bibliogr.: p. 32 (5 pavad.)Vytauto Didžiojo universitetasŽemės ūkio akademij

Biogenic amines and mycotoxins concentrations in baled silage from organic and conventional farms

ABSTRACT The aim of the current study was to investigate biogenic amines and mycotoxins concentrations in baled silage (mainly Poaceae family grasses) prepared in organic and conventional farms and to relate these parameters to fermentative parameters. The mean dry matter (DM) content was 364.10±93.31 and 424.70±95.93g/kg in the silage from organic and conventional farms respectively. The silage samples from organic farms had 17.00% higher (P≤ 0.05) tyramine (TY) than the silage from conventional farms. Conventional farm samples were characterized by 46.00% higher histamine (HIS) (P≤ 0.05), 9.80% higher putrescine (PUT) (P≤ 0.05), 17.30% higher cadaverine (CAD) (P≤ 0.05). Aflatoxins (AFL) (total) and zearalenone (ZEN), T-2/HT-2 concentrations were higher respectively 16.00% (P≤ 0.05) and 13.40% (P≤ 0.05), 1.80% (P≤ 0.05) in the silage prepared in organic farms. Deoxynivalenol (DON) concentration was higher 42.40% (P≤ 0.05) in silage from conventional farms. Volatile fatty acids (VFA), lactic acid, ethanol, pH and ammonia nitrogen showed that the silage samples from organic and conventional farms were of good quality. Our study suggests differences in biogenic amine formation or mycotoxins content in silage from organic and conventional farming, but, overall, the measured values are too low to be relevant for animal health. Furthermore, these differences might as well be due to the difference in dry matter content and plant maturity between the organic and conventional silage samples

Ekologinio žemės ūkio taisyklės : gamyba, perdirbimas, realizacija, ženklinimas

Aut.: V. Rutkovienė, B. Bakutis, B. Bartaševičienė, H. Danilčenko, J. Kučinskas, V. Slavinskienė, A. Šaluchaitė, V. ŽekonienėVytauto Didžiojo universitetasŽemės ūkio akademij