The effect of humic acids on the natural resistance of the body of broiler chickens and the quality of their meat

K. Korsakov¹, I. Simakova¹*, A. Vasilyev¹, S. Lifanova² and L. Gulyaeva²

¹Federal State Budgetary Educational Institution of Higher Education Saratov State Agrarian University named after N.I. Vavilov, Department of Veterinary Medicine, Biotechnology and Food Technology, Sokolovaya street, 335, RU410000 Saratov, Russia
²Federal State Budgetary Educational Institution of Higher Education Ulyanovsk Agrarian University named after P.A. Stolypin, Department of Food Production Technology, Noviy Venets Boulevard, 1, RU432017 Ulyanovsk, Russia
*Correspondence: simakovaiv@yandex.ru

Abstract:

The aim of the work is to study the effectiveness of the concentration of humic acids of Reasil Humic Vet feed additive on the increase of the feed bioavailability for poultry and the probability of its negative impact on the safety and marketable characteristics of the final product. Studies were conducted on the basis of the Saratov State Agrarian University in two similar groups of broiler chickens ‘Cobb 500’, 100 heads each. Poultry feeding consisted of the same complete feed, but the drinking water for the broilers of the experimental group was enriched by humates in the amount of 0.5 ml L^-1. Based on the data obtained by daily weighing of the poultry and considering the feed intake, a positive trend of the influence of the feed additive on the average daily weight gain and feed conversion per unit of production was noted. The results of slaughter and anatomical cutting of broiler carcasses revealed that metabolic processes were more active in the body of an experimental poultry, reflected in the intensive growth of muscle tissue and fat deposition, which contributed to an increase in the yield of edible parts from carcasses by 9.9%. Studies of composition of broiler blood indicate non-toxicity of the recommended concentration of humates in the feed additive, its stimulation of non-specific resistance of the organism, contributing to the functioning of the immune system and the development of internal organs and, as a consequence, ensuring the safety of the products obtained from them.

Key words:

body resistance, humic acid, live weight, muscle and adipose tissue, Reasil Humic additive, Safety

The effect of sapropel extracts on microflora and physicochemical parameters of Dried Distillers’ Grain

D. Nsengumuremyi¹*, N.V. Barakova¹, V.A. Romanov¹, A.S. Mityukov² and A.V. Guzeva²

¹Saint Petersburg National Research University of Information Technology, Mechanics, and Optics, Department of Food Biotechnology (Vegetable stock), Lomonosova street 9, RU191002 St. Petersburg, Russia
²Federal State-funded Scientific Establishment, ‘Russian Academy of Sciences (RAS) Limnology Institute’ (INOZ RAN), Syevasťyanova street 9, RU196105 St. Petersburg, Russia
*Correspondence: nsedanco@yahoo.fr

Abstract:

This article is devoted to the effect of ultradispersed humate sapropel extracts, obtained from air-dry samples of sapropel, from Seryodka deposit (Pskov region, Russia) by alkaline extraction under the action of ultrasonic radiation, on microbial and physicochemical parameters of Distillers’ grain (DG) during storage. At the end of the distillation, wet DG was divided and treated with sapropel extract. The untreated sample served as a control. Both (treated and untreated) were then dried to 10% moisture content. Microbial and physicochemical parameters (moisture content, pH, titrable acidity (TA), acid value (AV) of fats) were assessed before storage of dried DG. A similar experiment was repeated after one week of storage but on microbial load. The microbial counts ranged from 2.3 × 10⁴ CFU g^-1 (untreated) to 1.77 × 10⁴ CFU g^-1 (treated) before storage while 2.5 × 10⁴ CFU g^-1to 2.18 × 10⁴ CFU g^-1 accounted for after a week of storage. The pH had increased from 4.5 ± 0.1 to 6.1 ± 0.1 before and after treatment respectively. TA likewise decreased from 3.2 ± 0.4 to 2.03 ± 0.06%. The results showed that sapropel extracts had effects on microflora and physicochemical parameters of DDG.

Key words: