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CHEMICAL COMPOSITION AND NUTRITIVE VALUE OF RAW AND PROCESSED MANGO (MANGIFERA INDICA) SEED KERNEL

P Vasantha Kumar* and R Ravi**
*Associate Professor
Department of Animal Nutrition
Veterinary College and Research Institute
Tamil Nadu Veterinary and Animal Sciences University
Namakkal-637 002, Tamil Nadu, India.
**Professor and Head
Department of Animal Nutrition
Veterinary College and Research Institute
Tirunelveli, Tamil Nadu

International Journal of Family and Home Science Vol.8 (2) (July - Dec, 2012) (145 - 150)

Abstract

India is the largest producer of mango in the world producing about 15.0 million tons per annum. Large quantities of mango seeds are available from mango fruit processing industries and safe disposal without environmental pollution pose hardship. A study was undertaken to assess the chemical composition and nutritive value of raw and lime water treated mango seed kernel. The crude protein, ether extract, crude fibre, total ash, nitrogen free extract, calcium, phosphorus, total tannins, NDF, ADF, hemi-cellulose, cellulose, lignin content (% DM) of raw mango seed kernel (MSK) were 5.70, 13.30, 2.27, 2.46, 76.27, 0.21, 0.40, 5.80, 25.97, 5.22, 20.75, 3.50 and 1.83, respectively. The gross and AME content (kcal / kg) were 4886 ± 64.0 and 2550 ± 53.0, respectively. Among the three methods employed viz. soaking in water for 24 h, boiling in water for 30 min and lime water treatment for 12 hours to detoxify the tannins, lime water treatment of MSK at the ratio of 1:7 (w/v) was found to be better which reduced the tannin content by 50.0 % and increased the ME value (kcal per kg) of MSK to 2697 ± 47.0 from 2550 ± 53.0 .

Key words: Mango seed kernel, chemical composition, tannin, lime water

India is the largest producer of mango (Mangifera indica) in the world producing about 15 million tons per annum and contributing 50 % of total mango production worldwide. During processing of mangoes, peel and stones are available as wastes (40-50 % of fruit weight) and safe disposal of these by-products without environmental pollution pose hardship to the industry. Mango Seed Kernel (MSK) in the stones is available to the tune of 7.5 lakh tonnes per annum in our country (Barman and Rai, 2003). The MSK containing high levels of nitrogen free extract (75 %) and ether extract (12.0 %) with low (2.5 %) level of crude fibre (Barman and Rai, 2004) could serve as an alternate energy source in the ration of animals. However, high level of total phenols and tannins (mainly hydrolysable gallotannins) limits the utilization as animal feed (Barman and Rai, 2006). Attempts have already been made to reduce the level of tannins by soaking / boiling in water (Diarra et al., 2010; Dakare et al., 2012). Detoxification of tannins by soaking or boiling in water leads to more dry matter and nutrient losses which necessitate alternative methods of detoxification. Hence, this study was undertaken to find out the chemical composition and nutritive value of raw and processed (lime water treated) mango seed kernel.

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