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《Acta Agrestia Sinica》 2017-04
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Effects of Treatment Methods on the Hydrocyanic Acid Content and Nutrient Composition of Cassava Roots

TIAN Jing;ZHU Lin;DONG Zhao-xia;WANG Xiao-ya;ZHANG Jian-guo;College of Forestry and Landscape Architecture,South China Agricultural University/Guangdong Engineering Research Center for Grassland Science;  
Cassava(Manihot esculenta Crantz)roots are rich in starch,and could substitute for corn as the source of energy feed.Cassava roots generally contain a large amount of cyanogenic glucosides,which would limit their application in livestock diets.It is necessary to study the detoxifying technique of cassava.In this paper,four detoxification methods of boiling,drying,microwave heating and ensiling were compared.The results showed that:boiling and drying were better than the others in reducing cyanogenic glucosides of cassava roots.Detoxification rates of either boiling for 25 min or drying for 12 hwere up to81.7%.Detoxification rate of microwave heating for 6 min was 78.8%.While ensiling at 30℃ and 40℃for 56 dremoved over a half of HCN Although the former three methods had high detoxification rate,they consumed a lot of energy,especially for that boiling result in a great loss of nutrients.Boiling for 15 min reduced crude protein by 17%,water soluble carbohydrates by 24.9%,starch by 11.8%,and the losses would further increase with the increased time from 15 to 25 min.Ensiling was a low cost method due to requiring less energy and preserving nutrients well.
【Fund】: 十二五国家科技支撑计划(2011BAD17B02-05)资助
【CateGory Index】: S533
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