ANTI-NUTRITIONAL CONSTITUENT OF COLOCASIA ESCULENTA ...
ANTI-NUTRITIONAL CONSTITUENT OF COLOCASIA ESCULENTA ... ANTI-NUTRITIONAL CONSTITUENT OF COLOCASIA ESCULENTA ...
A.3.1 Introduction CHAPTERA-3 RESULTS Nutritional value is the main concern when a crop is considered as a food source. Amadumbe is cultivated as a subsistence staple in parts of South Africa Information on nutritional and anti-nutritional values of processed and unprocessed Amadumbe tubers grown in KZN, South Africa is given in this chapter. A.3.2. Proximate composition The proximate composition of the two varieties of Colocasia esculenta tuber, from different locations, was determined by standard procedures. The data for the processed and the unprocessed samples are presented in Tables A3-la - A3-lc. In general, the proximate composition ofthe two varieties ofAmadumbe studied is similar to that ofall known tubers. However, differences between the two varieties, as well as between the different locations, were observed in the proximate composition values obtained. The moisture and ash contents of Amadumbe are presented in Table A3-la. Water content was high in the investigated starchy staples, which, on average, ranged between 84 and 89 per cent. The unprocessed Esikhawini varieties showed the highest moisture content 43
Table A3-1a: The moisture and ash content (g/100g DM) ofprocessed and unprocessed Amadumbe (Co/ocasia escule1ltJl) tnOOrs Esikhawini white (EW) 89 4.4 Boiled white (BW) 88 4.4 Roasted white (RW) 84 3.6 Fried white (FW) 85 4 Esikhawini purple (EP) 89 3.3 Boiled purple (BP) 88 3.2 Roasted purple (Rp) 87 4 Fried purple (FP) 85 3.2 Mtnbatnba white (MtW) 87 5.4 Mtnbatnba purple (MtP) 86 4.4 Makatini white (MakW) 87 5.4 Makatini purple (MakP) 86 4.9 The ash content of Amadumbe tubers ranged between 3.2 and 5.4 per cent of the dry weight material. The mean ash content for the unprocessed tubers was 4.6 per cent and that ofthe processed tubers, 3.7 per cent. The ash content ofAmadumbe is significant in that it contains nutritionally important minerals. The erode fat and protein content ofthe Zululand Colocasia esculenta species are shown in Table AJ-Ib. 44
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A.3.1 Introduction<br />
CHAPTERA-3<br />
RESULTS<br />
Nutritional value is the main concern when a crop is considered as a food source.<br />
Amadumbe is cultivated as a subsistence staple in parts of South Africa Information on<br />
nutritional and anti-nutritional values of processed and unprocessed Amadumbe tubers<br />
grown in KZN, South Africa is given in this chapter.<br />
A.3.2. Proximate composition<br />
The proximate composition of the two varieties of Colocasia esculenta tuber, from<br />
different locations, was determined by standard procedures. The data for the processed<br />
and the unprocessed samples are presented in Tables A3-la - A3-lc. In general, the<br />
proximate composition ofthe two varieties ofAmadumbe studied is similar to that ofall<br />
known tubers. However, differences between the two varieties, as well as between the<br />
different locations, were observed in the proximate composition values obtained.<br />
The moisture and ash contents of Amadumbe are presented in Table A3-la. Water<br />
content was high in the investigated starchy staples, which, on average, ranged between<br />
84 and 89 per cent. The unprocessed Esikhawini varieties showed the highest moisture<br />
content<br />
43
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