›› 2018, Vol. 45 ›› Issue (8): 2135-2146.doi: 10.16431/j.cnki.1671-7236.2018.08.012

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Nutritional Value of Cassava and Its By-products and Their Application in Animal Production

CUI Yiyan, TIAN Zhimei, LI Zhenming, MA Xianyong   

  1. State Key Laboratory of Livestock and Poultry Breeding, Guangdong Public Laboratory of Animal Breeding and Nutrition, Guangdong Key Laboratory of Animal Breeding and Nutrition, The Key Laboratory of Animal Nutrition and Feed Science(South China) of Ministry of Agriculture, Institute of Animal Science, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China
  • Received:2018-01-24 Online:2018-08-20 Published:2018-08-15

Abstract:

Cassava is resistant to drought and easy to manage.Its stem,leaf,root and industrial by-products are rich with nutrients,which is a good non-conventional feed.The contents of crude protein,crude fat,ash,Ca,Fe, Zn and Mn in cassava leaves are rich.Compared with cassava leaves,cassava roots have a lower level of crude protein,crude fat,minerals and vitamins that is a good source of energy.Cassava residues are mainly composed of the skin and broken cells wall of cassava,which have very low content of crude protein,but rich with crude fiber,neutral detergent fiber,acid detergent fiber,mineral and amino acids.Ca,P and amino acids in cassava residue are imbalanced.The species,growth conditions,harvest methods,harvest time,processing technology will affect the nutrients contents of cassava and its by-products.Cassava contains cyanide,tannin,phytic acid and other anti-nutritive factors.Cyanide is the most important factor limiting cassava applications.Cyanide can bind cytochrome C oxidase,block the mitochondrial electron transport chain,inhibit aerobic respiration,and cause central nervous system depression and death.Tannin and phytic acid can combine with protein,which hinder the digestion and absorption of nutrients.Cassava can be detoxified by the physical and chemical methods,such as boiling, baking and drying,as well as fermentation,breeding and so on.Cassava and its by-products can be widely used in animal production, and have no adverse effects on animal's growth performance and meat quality.The development and utilization of unconventional feed is beneficial to alleviate the shortage of feed resources and reduce the cost of breeding.The nutritional value,anti-nutritional factors and detoxification methods,as well as its application in animal production of cassava and its by-product were introduced in order to provide theoretical basis and references for the comprehensive utilization of cassava in livestock and poultry breeding.

Key words: cassava; cassava leaf; cassava residue; cyanide

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