Pyrethrum marc (Pymarc) as a potential substitute for fish meal in compounded dairy ration in Kenya.
2004
Waweru, J. M. | Abdulrazak, S. A. | Onyango, T. A. | Ondiek, J. O. | Fujihara, T., Egerton University, Njoro(Kenya).
The study was conducted in Ngongongeri Farm of Egerton University to find ouot effects of Pyrethrum Marc (PM) substituting graded proportion of nitrogen provided by fish meal (FM) in a compound ration, in terms of intake, digestibility and milk yield and composition. Twenty-five lactating Friesian dairy cows grazing on a Rhodes grass pasture(basal diet) were randomly allocated to five treatments diets and supplemented with five different compounded concentrates replacing 0(control, RT1), 25 (RT2), 50 (RT3), 75 (RT4) and 100 (RT5) per cent of the FM nitrogen. Lactation days were used as covariant in the analysis of data using GLM procedure of SAS computer package. Supplementation with treatment diets, done @ 2.0 kg/day, did not affect significantly (P0.05) the intake and digestibility of DM and OM. Daily milk yield and its protein content differed (P0.05) among the dietary groups, and ranged from 12.27 to 10.00 kg/d for milk yield and 3.26 to 3.02 for milk protein content in RT1 to RT5, respectively. The responses were attributed to the change in the quality and quantity of amino acids absorbed in the small intestines. However, there was no effect of replacement on lactose and butter fat content to the milk. It was concluded that pymarc could be used effectively by replacing 25 per cent nitrogen of FM in a compounded dairy ration.
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