Growth of young turkeys at different levels of lysine and methionine in feed

Authors

  • O. I. Tymoshchuk ,
  • S. M. Gryshchenko ,

DOI:

https://doi.org/10.31548/poultry2024.07-08.009

Keywords:

eed, poultry, turkeys, amino acids, live weight, productivity

Abstract

The article examines the effect of using complete feed with different levels of lysine and methionine on the growth of turkeys. Experimental studies were performed on young turkeys of the BIG 6 cross-breeding meat direction. Five experimental groups of birds were formed by the method of balanced groups at the age of one day. The experiment lasted 126 days and was divided into two periods: comparative (7 days) and main (119 days). During the comparative period, the experimental youngsters consumed compound feed of the control group. In the main period of the experiment, the amount of lysine and methionine relative to the poultry feed of the control group decreased or increased proportionally by 5 and 10% according to the periods of cultivation.

It was established that different levels of lysine and methionine in compound feed for young turkeys affect its productivity in different ways. In particular, at the end of the experiment, at the age of 126 days, the highest live weight was achieved by turkeys that consumed compound feed with an increase in the amount of lysine and methionine by 5 and 10% – they outnumbered the counterparts of the control group, respectively, by 5.9 (P<0.01) and 3.6%. Poultry that received compound feed with a reduced amount of lysine and methionine were inferior to control peers by 5.6 (P<0.05) and 2.7%, respectively, according to the mentioned indicator. The description of the growth of young turkeys using mathematical methods confirmed the S-shaped ascending shape of the growth curve with high coefficients of determination for each experimental group.

It has been proven that in almost all periods of the experiment, young turkeys that consumed compound feed with a higher level of lysine and methionine prevailed in terms of average daily live weight gains of their counterparts, which were fed compound feed with a lower proportion of lysine and methionine. In general, turkeys that consumed compound feed with increased levels of lysine and methionine by 5 and 10% were characterized by higher average daily live weight gains – they exceeded control analogues by the mentioned indicator by 6.1 and 3.6%, respectively. Experimental birds that received combined feed with a reduced amount of lysine and methionine by 10 and 5% were inferior to peers of the 1st group by 5.9 and 2.7%, respectively. It was established that the relationship between different levels of lysine and methionine in compound feed for young turkeys and its average daily weight gain is described by a polynomial line with a reliable approximation coefficient R2=1. At the same time, the correlation analysis showed that there is a direct average relationship between these phenomena (rs=0.6, P<0.005).

References

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Issue

Section

Feeding