EVALUATION OF A CHITOSAN–DRY WHEY-BASED COMPLEX FEED ADDITIVE ON GROWTH PERFORMANCE, HEMATOLOGICAL STATUS, AND SORPTION–PROTECTIVE EFFECTS IN BROILER CHICKS
Keywords:
chitosan, chitin, dry whey powder, broiler chick, growth rate, live body weight, average daily gain, hematological indicators, hemoglobin, erythrocytes, total protein, globulins, sorption–protective effect, poultry production.Abstract
In intensive poultry production, rapid growth, high stocking density, and variability in feed raw-material quality create conditions in which maintaining intestinal stability, reducing toxic load, and optimizing growth outcomes become key management priorities. Biologically based feed additives that combine protective and nutritional functions are therefore of particular practical interest. Chitosan is a natural biopolymer derived from chitin and is characterized by sorption, bioadhesive, and “coating” properties that may strengthen protective–adsorptive mechanisms along the gastrointestinal tract; dry whey powder, in turn, provides high-biological-value protein and essential amino acids that can improve the nutritional completeness of broiler diets. In this study, a chitosan + dry whey powder complex was administered to Cobb cross broiler chicks via drinking water from 7 days of age at doses of 40, 60, and 80 mg per bird per day. Growth performance (body weight dynamics and average daily gain), survivability, and selected hematological–biochemical blood indicators were assessed under vivarium conditions. The results indicated that supplemented groups demonstrated improved growth parameters compared with the control, while metabolic markers remained within physiological ranges. The 60 mg dose showed a relative advantage in growth intensity, whereas the 80 mg dose was interpreted as more appropriate from the standpoint of survivability and sorption–protective orientation. Overall, the findings support the need to justify dose selection according to targeted production goals (maximal growth vs. enhanced preservation and protection) when implementing additives derived from secondary food-industry resources.
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