Production performance of laying hens is related to strain and stocking density
KE Anderso and K. Jenkins of the Department of Poultry Science at the University of North Carolina in the United States published their findings in the International Journal of Poultry Science, which studied feeding rations, trough spacing, and stocking density. The effect of egg production, quality and size distribution on two brown-shell hens.
A step-up protein (SUP) feeding system can reduce feed consumption (FC) and reduce body weight (BW), but the egg production and total egg production of SUP hens and the hens of the step-down protein (SDP) program The equivalent or more, the researchers explained.
The SUP regimen resulted in a decrease in egg weight, which may be due to a decrease in BW during laying hens. Because of the decline in BW under the SUP system and a slight decrease in FC, BW and egg weight (EW), it may have an economic advantage. Therefore, the purpose of this trial was to evaluate the impact of the SUP regime on the subsequent productivity of brown-shell hens and the effect of feeder spacing and stocking density on performance.
For two brown shell eggs, Hyland Brown (HB) and Nick 'Brown Nick' (BN) use three different diets, the common SDP system, the SUP system: low-energy chick material for 9 weeks (SUP9) and SUP Institution: Low energy chick material for 12 weeks (SUP12).
The SUP9 and SUP12 feeding regimes resulted in significantly lower BW and feed conversion rates for hens than for the SDP regimen and shorter sternal lengths for hens than for SDP hens.
There was no significant difference in egg production between the three systems, but the SUP12 group hens had a lower feed conversion rate but the highest survival rate.
The 13.6 cm feeding trough interval resulted in a poor feed conversion rate in the SUP12 group hens.
The feeding space of 482 square centimeters per hen resulted in a significant improvement in egg production. Each hen produced 37 eggs and the survival rate of the flock increased by 8.1%.
Only stocking density affected egg income and feed costs and egg income and feed cost were higher for hens raised in a space of 482 square centimeters, at $2.39 and $0.21, respectively.
The researchers believe that the surface differences shown in this study appear to be primarily related to strain differences and stocking densities. This study demonstrates that SUP low-protein, low-energy chick diets can be used as part of a feeding diet that reduces the weight of the birds and leaves no problems with the chickens entering the laying period.
Feeding the hens did not result in a decline in the economic return of the laying stage. This article provides a lower stocking density for the hens and increases the income of each hen, Anderson and Jenkins conclude.
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