Nutrition value of beta-mannanase treated coconut meal and effect on growth performance in broilers
2001
Chatchai Sanguansook | Saisamorn Lumyong | Suchon Tangtaweewipat | Chartchai Khanongnuch
Beta-mannanase produced by Bacillus subtilis 5H was used to digest coconut meal (CM), yielding manno-oligosaccharides (MOS) about 12 percent of dried CM. The enzymatic treated CM (ETCM) showed a markedly reduction in crude fiber (CF) from 34.53 to 20.53 percent, while lipid content and nitrogen free extract (NFE) were increased from 18.75 to 29.25 percent and 37.61 to 43.10 percent when compared with non-enzymatic treated CM (NTCM), respectively. Metabolizable energy (ME) value of ETCM was also increased significantly from 3.22 to 3.75 kcal/g. The effect of either ETCM and NTCM incorporated into broiler diets were determined in completely randomized design (CRD). A total of 300, 7 day-old broiler chicks were randomly allotted to five treatments, each treatment having three replicates. Each group of bird was randomly fed as following: Control diet, ETCM incorporated at 15, and 20 percent and NTCM incorporated at 15 and 20 percent in the diets, respectively. The ME content of all diets was adjusted to be 3.20 kcal/g. It was found that there was no significant difference (P0.05) in body weight gain (2.18, 2.15, 2.11, 2.13 and 2.12 kg, respectively). The feed consumption decreased (4.80, 4.42, 4.38, 4.45 and 4.49 kg, respectively, P0.05) when fed with the diets containing ETCM and NTCM, but feed conversion rate (FCR) was improved significantly (P0.05) when compared to the control diet. It is concluded from this experiment that the ETCM could be used to substitute in the broiler diets at level of 15 and 20 percent without any adverse remark.
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