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Reproductive capacity of repairing standard black mink females in dependence of the food enegry level during the growing period

https://doi.org/10.17238/issn2072-2419.2021.3.206

Abstract

Studying the effect of different energy levels of feeding of replacement female short-haired minks during the rearing period (July-August) on the formation of their future reproductive capacity was the aim of the research. The experiments were carried out on replacement females of short-haired standard black mink in the animal farm of the Saltykovsky Tribal Fur Farm JSC, Moscow Region. Тhe level of energy supply in July-August was specified for replacement females mink in order to study the subsequent reproductive ability. During this period, the feeding level (in terms of energy) was limited by 10.0% in the experimental group. After the end of the experiment (end of August), the minks were transferred to feeding according to the existing energy norms (2007). The content of digestible nutrients in 100 kcal of MA was: protein – 7.6-9.9 g; fat – 3.7-4.9 g; carbohydrates – 2.9-5.1 g, with a carbohydrate-fat ratio (by calorie content): 1: 1.4-4.0 during the rearing period (June-November) of replacement female minks. Two groups were formed for the subsequent assessment of reproduction indicators in the second experiment from the replacement female minks left for the tribe, in accordance with the type of feeding in July-August. It was found that the nutritional requirements of females during reproduction and lactation is covered by the carbohydrates and fat content in the diet of 13.2-16.4% and 39.1-38.1%, respectively, of the caloric content of the feed (with a ratio of 1: 2.3-3.0) and a protein level on average of 10.1-10.6 g per 100 kcal MA. The results obtained indicate that during adaptation of the short-haired mink to the existing feeding technology under the modern food base conditions, a decrease in the energy nutrition level of replacement females during the growth period in JulyAugust (by 10% below the recommended norms) satisfies the nutritional requirements for breeding growing females, ensures the formation of high reproductive ability: fertility per 6,37±0,44 puppy and output of young animals 5,24±0,43 puppies per main female. It allows to reduce feed costs by 10.3% during this period.

About the Authors

N. N. Loenko
ФГБНУ «Научно-исследовательский институт пушного звероводства и кролиководства имени В.А. Афанасьева»
Russian Federation

Candidate of Agricultural Sciences, Leading Researcher of the Department of Animal Breeding and Rabbit Breeding



V. N. Kulikov
ФГБНУ «Научно-исследовательский институт пушного звероводства и кролиководства имени В.А. Афанасьева»
Russian Federation

Candidate of Agricultural Sciences, Leading Researcher of the Department of Animal Breeding and Rabbit Breeding



I. P. Ludnov
Federal State Budget Scientific Institute «Scientific Research Institute of Fur - Bearing Animal Breeding and Rabbit Breeding named after V.A. Afanas`ev»
Russian Federation

Junior Researcher, Department of Animal Breeding and Rabbit Breeding



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For citations:


Loenko N.N., Kulikov V.N., Ludnov I.P. Reproductive capacity of repairing standard black mink females in dependence of the food enegry level during the growing period. International Journal of Veterinary Medicine. 2021;(3):206-210. (In Russ.) https://doi.org/10.17238/issn2072-2419.2021.3.206

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ISSN 2072-2419 (Print)