Effect of the supplemental PROLINBOR, boron and linolenic acid-enriched protein concentrate, added to layer diets on egg quality

Summary The experiment used 288 Roso SL-2000 layers aged 60-66 weeks. The layers were reared according to the standard technology, in two-tier cages, with free access to the feed and water. The layers were assigned to four groups (one control and three experimental variants, differing by the dietary energy and protein source of the compound feed (15.11% CP, 4.48% EE, 11.80 MJ/kg ME) as follows: the control group received corn germs (47% oil), while the experimental groups received PROLINBOR type 0.1 (V1), type 0.04 (V2) and type 0.03 (V3). All diets were isocaloric, isoprotein and contained similar levels of total sulphur amino acids, of available calcium and phosphorus. The experiment monitored the following parameters: laying percentage, average egg weight, proportion of egg components (yolk, egg white and shell weight). Twelve average yolk samples were constituted from each laying, and assayed for dry matter, protein, fat, ash, vitamin E, fatty acids profile and cholesterol level. Egg shell samples were assayed for calcium and ash levels. The results have shown that the boron and linolenic acid-enriched protein concentrate, PROLINBOR, had a beneficial influence on yolk cholesterol.