THE EFFECT OF LYSINE CONCENTRATION AND THE RATIO OF METHIONINE TO THREONINE IN FEED ON THE PRODUCTIVE QUALITIES OF LAYING QUAIL

Abstract

A study was conducted to assess the effect of lysine levels and the ratio of methionine to threonine in the diet on the productive performance of laying quails aged 6-26 weeks.
In accordance with the experimental design, at 42 days of age, four groups of 30 birds each (24 females and 6 males) were formed from replacement young stock.
The control group of laying quails consumed the basic diet (BD) – a complete loose feed (lysine – 1.1%, methionine – 0.5%, threonine – 0.75%).
The diet of the experimental groups was as follows: in the second experimental group, the methionine content was increased by 0.5%; in the third experimental group, the threonine content was increased by 0.5%; in the fourth experimental group, the methionine and threonine content was increased by 0.5% simultaneously.
The basis for the compound feed of all groups was: soybean meal – 30%, wheat – 33%, corn – 25%, sunflower oil – 2%, other feed materials and additives – 5%. The birds' needs for trace elements, vitamins, and other biologically active substances were met by adding 0.5% premix intended for adult birds to their diet. The only difference between the compound feeds was the concentration of methionine and threonine.
The results of the study showed that the highest productivity indicators were observed in the laying quails of the experimental group, in whose diets the threonine level was increased by 0.5 g per 1 kg of compound feed.