Effects of dietary n-3 polyunsaturated fatty acids and ... - FINS

1 st WorkshopXIII International Feed Technology Symposiumcontradictory effect on blood serum protein (poultry); no sure effect on egg yolk lipidsand fatty aids composition (laying hens).The comparison of experimental results from feeding the additive BIOPRO as probioticin sires` diets showed that: the great relative effect was obtained on the blood level ofMg; both the levels of blood total protein and P were increased; no effect was obtainedon the level of Ca and the blood glucose had tendency to lower; there was positivecorrelation between levels of Zn both in the blood and sperm.The shortage and continuous price enhancement of traditional nutritive substances in theanimals diets calls for search of their alternative. In Bulgaria the research in this area isinsufficiently. There are not investigations for rabbits. In this respect is interesting tostudy the dry distillers grain of wheat (DDGW), produced by Geo Milev Ltd, IskarStation, Sofia, as a source of crude protein (CP) - 26% and crude fiber (CF) -13% as wellas the meadow hay and wheat straw as main sources of crude fibers in the growingrabbits diets. Our experimental work goes on with other kind of dry distillers` grain.Iodine, a requisite substrate for the synthesis of thyroid hormone, is known to causepathological conditions when its intake is excessive or deficient. We examinedbiological effect of Iodine in biological active form from Jodis concentrate produced byUkraine. Our experimental results by poultry and rabbits showed sure effects on level ofproduction, mortality, reproductive capacity and biochemical changes of the bloodparameters.Our conclusions here are in agreement with biological sensible concept of animal healthand quality of animal products influenced by nutrition.Key words: animal, nutrition, additives, BIO-PRO, OVOCAP, DDGW, plant extract,Tribulus terrestris, Jodis concentrateINTRODUCTIONAlthough the world`s population is expected to grow by only 25% in the next 20 years,an increase of 50% in the demand for food of animal origin is projected. The decrease inabsolute and per capita land area available for agricultural use will result in less areaavailable for producing feed and to increased competition between humans and animalsfor energy and nutrients. In this context it is an important task of the science of animalnutrition to discover and exploit new resources, particularly product which cannot beused directly by humans (e.g. high-fiber organic substances) or which are consideredundesirable or unsuitable for human consumption (offal and other food industry byproducts).Whereas the utilization of conventional feedstuffs and nontraditionalbyproducts in animal nutrition was once an extremely economic model for recycling, inthe recent years doubts have arisen, due to the occurrence of BSE and the discovery ofdioxins in the feed. In EU agricultural policy has in part responded to these issues withnew regulations. But it is very doubtful it can be considered ecologically responsible,economically reasonable or in the long time politically justifiable to use byproductsconsidered valuable by nutritionists as fuel or to dispose of them as waste. Such a trendmay be tenable for short tine in Europe, but it will not be acceptable worldwide,particularly in regions where feed supplies are scare.75