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Sunday, August 28, 2016

RESEARCH: Cassava root meal as substitute for maize in layers ration. .

RESEARCH: Cassava root meal as substitute for maize in layers ration. The effect of replacing maize with graded levels of cassava root meal (CRM) as energy source in the diet of laying hens was evaluated during the eight weeks of feeding experiment on performance and cost benefits on layers. The fresh cassava roots were peeled, washed and grated. The grated cassava mash was poured into a sack and pressed using a hydraulic pressing machine to remove excess water. The dewatered cassava mash was broken into fine granules and was sun dried on black polyethylene sheets, after which it was milled in a hammer mill and packed in bags as cassava root meal (CRM). RESEARCH: Cassava root meal as substitute for maize in layers ration. Forty-five Nera black laying hens of 24 weeks of age were allocated to five dietary treatments, with nine birds per treatment in a completely randomized design. CRM was used to formulate the diets at 0, 25, 50, 75, and 100%. The result showed that the feed intake of birds in the control group was significantly (p<0.05) different from those fed the CRM diets. The average weight gain of layers receiving up to 50% CRM was similar to the control birds, but significantly different from layers fed 75 and 100% CRM. No mortality was recorded. Egg production per hen per day and average egg weight were significantly different (p<0.05) for birds consuming more than 50% CRM in T4 and T5. Layer feed ration was made cheaper by the replacement of maize with cassava root meal in the diets. Forty-five Nera black layers were divided according to a completely randomized design into five groups of nine birds each. The birds were habituated for 2 weeks before the beginning of the feeding experiment, when birds were 24 weeks old. The experiment lasted for 8 weeks. The processed CRM was used to formulate four diets such that maize was replaced by CRM at 25, 50, 75 and 100%, which are represented here as T2, T3, T4 and T5, whereas T1 served as the control diet without CRM. The composition of the five formulated diets is presented in Table below, layers were fed twice a day and water was provided ad libitum. Feed intake was measured daily. Individual birds were weighed before the beginning of the experiment to obtain initial body weight, and weekly thereafter. Eggs were collected twice a day and recorded. Also, 12 eggs from each treatment were weekly weighed to obtain mean egg weight. Birds were also observed for mortality. The replacement of maize by CRM up to 50:50 ratios did not significantly affect the hen-day egg production. However, CRM inclusion above 50% reduced (p<0.05) egg production and egg weight. Replacing corn by cassava up to 50% did not affect the performance of layers or egg quality and that the reduction in yolk pigmentation could be overcome by adding xanthophylls to the feed. More

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