Proximate composition, mineral contents, hydrogen cyanide and phytic acid of 5 cassava genotypes

摘要

Five cassava genotypes Rayong 5, Kaesetsart 50 (KU50), Rayong 2, Manatee and KMUL 36-YOO2 (YOO2), were used in this study. Investigations showed that cassava contained 9.2-12.3% moisture, 1.2-1.8% crude protein, 0.1-0.8% crude lipid, 1.5-3.5% crude fibre, 1.3-2.8% ash, 80.1-86.3% carbohydrate, 1406-1465 kJ 100 g~(-1) DM and 95-135 mg g~(-1) of phytic acid. Mineral contents were 10.9-39.9, 15.2-32.3 and 9.3-54.1 mg g~(-1) for Ca, Mg and P, respectively, and 221-328, 4.7-25.8, 1.41-4.25, 0.29-1.73 and 1.2-4.44 mg g~(-1) for K, Na, Zn, Mn, Cu, and Fe, respectively. HCN content ranged from 8.33 to 28.8 mg HCN/kg dry weight basis. A linear relationship between Ca and P and carbohydrate and energy existed with correlation coefficients of 0.99 and 0.82, respectively. Phytate: total p ranged from 77% to 88% and a linear relationship existed between phytate and total p with a correlation coefficient of 0.975.