Effects of Crab Shell Supplementation in Layer Diet on Performance and Egg Quality
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Abstract
This research aimed was to investigate the appropriate percentage of crab shell supplementation in layer diet on performance and egg quality and feed cost. The experimental design was a completely randomized design (CRD). One hundred and twenty 31-week-old laying hens were assigned to four treatment diets, including 0, 3, 6, and 9% crab shell. Each treatment had three replicates with ten hens. The results showed that hen-day production, feed intake, feed efficiency, egg mass, and egg weight were not significantly different (P>0.05). The egg quality, shell thickness, eggshell strength, shell weight, yolk weight, albumen weight, and haugh unit were also not significantly different (P>0.05). However, the supplementation of crab shell was significantly different in yolk color (P<0.01). Therefore, the layer diet with 9% crab shell could improve yolk color.
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