Humic acid supplement in laying hen diets
1999
Awut Tancho (King Mongkut's Institute of Technology Ladkrabang, Bangkok (Thailand). Faculty of Agricltural Technology. Dept. of Animal Production Technology)
Effect of humic acid supplemented feed on egg performance of laying hens was conducted. Nutrient digestibility and NPU of feed were studied in laying hen at the age of 40 weeks old. They were randomly devided into 5 groups, each group has 4 replicated and each replicate was 1 hen. Mixed feed of 16 percent protein level supplemented with 0, 0.1, 0.2, 0.3 and 0.4 percent by weight of humic acid was used for feeding. The result indicated that the humic acid supplemented feed increase the digestibility of calcium phosphorus and NPU. During the study on egg performance and egg quality of 5 groups of laying hen during 28-47 weeks old. Each group has 3 replicates and each replicate was 12 hens. Each group recieved the same feed which has been used at the first experiment. The experiment was conducted in completely randomized design (CRD). After 5 months of feeding, it was found that egg performance was significantly increased on hens fed with humic acid supplemented diet. The best egg performances and feed conversion ratio was at 0.2 percent supplemented. It was significantly better than those of non-supplemented group. Furthermore, shell weight and shell thickness were increased. The experiment concluded that humic acid supplemented feed enhanced egg performance and egg shell quality. By increasing number of egg production, shell weight and shell thickness and decreased the cost of production.
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