The impact of vermiculite on macroand micro-morphological indicators of the intestine and blood of geese

Age-related macro- and micro-morphological patterns of changes in the intestine and blood indicators of Lindovsky geese after the application of vermiculite were studied. There were recorded patterns of increase in the mass and length of different intestine areas in accordance with asynchronicity, heterochrony and age-related adaptation. The application of the feed additive had an effect on the growth and structural differentiation of the membranes of small and large intestines. The mucous membranes of 20-day old geese of the test group were 2-4 % higher than that in the control group. An increase in the thickness of the mucous membranes was mainly due to an increase in the height of surface epithelium and the size of folds by 6-13%, lamina propria and submucosa. The depth of crypths and their diameter also increased. The number of goblet cells in the surface epithelium and at the top of folds and intestinal villi grew. Unlike the control group, the test group was characterized by a decrease in the height of intestinal villi on average by 13.5%, and an increase in the width by 17.9%. Vermiculite had no destructive effect on the morphological indicators of the intestinal membranes. The parietal mucous layer of the geese of the test group had high sorption properties, since it contained active protein substances, including pancreatic and intestinal enzymes, immunoglobulins and substrate-binding proteins. A dose of 5.0 g/kg bw had a positive impact on hematological indices - an increase in the hemoglobin content in 20-30-day old geese and qualitative changes in erythropoiesis. The total protein content in the blood serum of the geese of the test group was relatively high, it indicated their productivity. At the same time, the level of alkaline phosphatase in the geese of the test group was lower than that in the control group. It is a favorable indicator of the development of the musculoskeletal system and it is accompanied by the activation of metabolic processes.

тонкий, толстый кишечник, гуси Линдовской породы, интенсивный рост массы и длины кишечника, стенка кишечника, ворсинки, покровный эпителий, кровь, small and large intestines, Lindovsky geese, increase in the mass and length of the intestine, intestinal wall, villi, surface epithelium, blood

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