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Not AvailableInadequate supply, exorbitant prices and diversion towards using cereal grains forbiofuel production, particularly maize, has led to a constant search for alternativeenergy sources for poultry and other non-ruminant species. The abundantavailability of cassava in certain regions makes it a good alternative to maizeand other cereal grains. Cassava root meal is rich in carbohydrate but low inprotein and all other nutrients, whereas, cassava leaf meal is a moderate sourceof protein. Results of studies to evaluate the replacement of cereals with cassavaproducts in poultry feed show wide variability due to differences in origin, variety,plant maturity at harvest, ecological conditions of plant growth and processingmethods. Cassava products contain a wide range of cyanogenetic glycosides,particularly linamarin and lotaustralin. The level of hydrocyanic acid releasedfrom the cyanogenetic glycosides limits the utilization of cassava, but with properprocessing, the dietary inclusion level of cassava meal can be increased for economicpoultry production. This paper reviews the nutrient composition of cassava and itsuses as a substitute for more conventional ingredients in poultry dietsNot Availabl

Variation in nutrient composition of cassava pulp from Thailand

Cassava (tapioca) is a starchy tropical tuber crop that is used as an energy source in animal diets. In the regions in which it is grown, most cassava is fed to animals in the form of whole tubers. In Thailand and other parts of south-east Asia, cassava tubers are processed further into chips or pellets for local animal feeding and for export to other parts of the world, including Australia. Cassava is also used for starch production, and in Thailand more than 10 million tonnes of cassava are used for this purpose per anum. A fibrous residual material known as cassava pulp, which constitutes 30% of the mass of the original tuber, is obtained as a by product of this process. About 1.5–2.0 million tonnes of cassava pulp are produced per year. As the starch extraction process is not very efficient, the pulp contains bout 50% starch on a dry basis (Ukita et al., 2006). However, the composition of the pulp differs between regions and according to the extraction and postextraction processes used. Cassava pulp is commonly fed to ruminant animals, but its nutritive value for nonruminant species such as poultry and pigs is unclear