Black gram (Vigna mungo) husk is one such agro industrial by products available in substantial quantity in Tamil Nadu. The use of tropical legume seeds and its by-products can be limited due to the presence of one or other toxic factors including tannins. Black gram husk samples were analyzed for total tannin. The total tannin content of black gram husk ranges from 2.70 to 4.55 per cent with a mean of 3.67 ± 0.31. per cent The ground samples of black gram husk were subjected to water soaking or calcium hydroxide [Ca (OH)2] treatment to reduce the total tannins.. When overnight water soaking or calcium hydroxide treatments were carried out the total tannins content in the husk was significantly (Pï€¼0.01) reduced to 1.14 or 1.77 per cent respectively. Water soaking was more effective in reducing the total tannins than the calcium hydroxide treatment and it was cost effective and easily adopted by farming community to utilize the nutrient content in Black gram husk.
Key words : Black gram Husk, Tannin, Water soaking, Calcium Hydroxide Treatment
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