Effect of Reduced Dietary Crude Protein with Balanced Limiting Amino Acids on Egg Weight and Reproductive Performance of Swarnadhara Layers

Beena C. Joseph, Jayanaik ., C. S. Nagaraja


A study was conducted in Swarnadhara (SD) layers to find out the effect of reducing crude protein
(CP) with supplementation of limiting amino acids to compensate the deficiency of CP. Egg weight
and reproductive parameters such as fertility, hatchability, number of saleable chicks and day one
old chick weight were studied in 240 SD layers in a completely randomized design in 5 treatments
with 6 replications of 8 birds in each. The control diet (T1) was based on corn soy bean meal
formulated with 16% CP and 2700 Kcal ME following the ICAR (2013) specifications recommended
for improved native chicken breeds. The diets T2 to T5 were made isocaloric to control and
composed with 15.5, 15.0, 14.5 and 14.0% CP, respectively. The levels of limiting amino acids namely
methionine, lysine, threonine and tryptophan were met as that of control by adding synthetic
preparation wherever necessary. Egg weight showed similar effects in all treatments at 32, 36 and
40 weeks of age. Reproductive parameters were recorded in four consecutive hatches and were
statistically analyzed. Results showed similar performances in T1, T2, T3 and T5, but were different
in T4 in terms of fertility, hatchability and number of saleable chicks. There was no significant
difference in progeny chick weight among different treatment groups indicating amino acid
supplementation supported equal performance in low CP diets in all the reproductive parameters.


Swarnadhara layers, Dietary Crude Protein, Limiting amino acids, Egg weight, Reproductive performance

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DOI: https://doi.org/10.21887/ijvsbt.v12i4.7684


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