Prospects for the utilization of Senna obtusifolia products as protein supplements for poultry
2021
Diarra, S.S.
The scarcity and high cost of conventional ingredients are major factors limiting the growth of the poultry industry globally. This has driven research into alternative ingredients for poultry feeding. Senna obtusifolia or cassia, a widely distributed shrub, is invasive in many regions of the world. The seeds and leaves of the plant are moderate protein sources with the protein having an acceptable amino acid profile, especially essential amino acids. This nutritional profile of Senna obtusifolia products (seeds and leaves), coupled with their availability make them potential protein supplements for poultry feeding; however, the presence of several antinutritional factors (ANFs) (Oxalate, phytate, saponins, tannins and haemagglutinins) hinders their fullest use in the diet. In recent years, there has been increasing research interest into processing techniques to reduce the ANFs content and make these products safe for poultry feeding. Depending on birds age, fermented Senna seed meal may be included in the diet of broilers and cockerels up to 200 g/kg without compromising birds’ performance but raw meal as low as 50 g/kg exerts antinutritional effects. More research is needed into maximum utilization of Senna products to reduce cost of production on smallholder to medium scale poultry farms. Newer processing methods will need to be developed in response to the increasing market price of conventional protein sources.
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