Nutritional evaluation of Zambia indigenous soy bean (Glycine max) and sunflower (Helianthus annuus) as protein sources in poultry and pigs diets

摘要

Results are given from 2 trials at the School of Agricultural Sciences Commercial Farm of the University of Zambia in Lusaka [date not given]. In the first trial 1-week-old Arbor Acres broiler chickens were fed a soyabean cake (SBC) or a sunflower meal (SFM) diet (n=60 for each treatment) for 7 weeks. There were no differences between groups in voluntary feed intake. Average daily weight gain of SBC chickens was higher than that of SFM chickens (P<0.05) as was N retention (P<0.05). Carcass DM and CP were higher (P<0.05) in SBC chickens, but ash, ether extract, Ca and P were the same as SFM. In trial 2, 12 Large White X Landrace barrows, 1-2 months old, were used. Voluntary feed intake was higher on the SBC diet than the SFM and daily liveweight gains were 0.526 and 0.284 g/head, respectively (P<0.05). Nutrient digestibility was higher (P<0.05) for the SBC diet. It is concluded that soyabean cake and sunflower meal can be used for broilers without adverse effect on growth rate and body conformation. However, for growing pigs soyabean cake is a better protein source than sunflower meal in the tropical environment of Zambia.