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White yam (Dioscorea rotundata)

IMPORTANT INFORMATION: This datasheet is pending revision and updating; its contents are currently derived from FAO's Animal Feed Resources Information System (1991-2002) and from Bo Göhl's Tropical Feeds (1976-1982).

Datasheet

Description
Click on the "Nutritional aspects" tab for recommendations for ruminants, pigs, poultry, rabbits, horses, fish and crustaceans
Common names 
Igname blanche, white Guinea yam, igname blanc, igname de Guinée, guinea yamswurzel, weißer Guinea yam, ñame blanco, ñame guineo blanco
Species 

Dioscorea rotundata Poir. [Dioscoreaceae]

Feed categories 
Related feed(s) 
Description 
The most popular yam in West Africa. The stem of this variety is round without wings and prickly at the base. The white flesh of the tubers produces a mealy starch. The tubers store well.
Nutritional aspects
Pigs 
The peelings are fed to pigs.
Nutritional tables
Tables of chemical composition and nutritional value 

Avg: average or predicted value; SD: standard deviation; Min: minimum value; Max: maximum value; Nb: number of values (samples) used

IMPORTANT INFORMATION: This datasheet is pending revision and updating; its contents are currently derived from FAO's Animal Feed Resources Information System (1991-2002) and from Bo Göhl's Tropical Feeds (1976-1982).

Main analysis Unit Avg SD Min Max Nb
Dry matter % as fed 17.7 1
Crude protein % DM 11.2 1
Crude fibre % DM 9.5 1
Ether extract % DM 1.2 1
Ash % DM 9.8 1
Gross energy MJ/kg DM 16.8 *
 
Pig nutritive values Unit Avg SD Min Max Nb
Energy digestibility, growing pig % 75.2 *
DE growing pig MJ/kg DM 12.6 *

The asterisk * indicates that the average value was obtained by an equation.

References

Oyenuga, 1968

Last updated on 24/10/2012 00:45:22

Main analysis Unit Avg SD Min Max Nb
Dry matter % as fed 26.2 1
Crude protein % DM 5.9 1
Crude fibre % DM 2.4 1
Ether extract % DM 0.5 1
Ash % DM 4.3 1
Gross energy MJ/kg DM 17.1 *
 
Amino acids Unit Avg SD Min Max Nb
Arginine % protein 7.5 1
Cystine % protein 0.8 1
Glycine % protein 1.5 1
Histidine % protein 2.1 1
Isoleucine % protein 3.3 1
Leucine % protein 5.2 1
Lysine % protein 3.5 1
Methionine % protein 0.9 1
Phenylalanine % protein 4.7 1
Threonine % protein 3.4 1
Tyrosine % protein 3.3 1
Valine % protein 4.4 1
 
Pig nutritive values Unit Avg SD Min Max Nb
Energy digestibility, growing pig % 86.3 *
DE growing pig MJ/kg DM 14.8 *

The asterisk * indicates that the average value was obtained by an equation.

References

Oyenuga, 1968; Peters et al., 1960

Last updated on 24/10/2012 00:45:22

Main analysis Unit Avg SD Min Max Nb
Dry matter % as fed 24.1 1
Crude protein % DM 4.4 1
Crude fibre % DM 1.5 1
Ether extract % DM 0.3 1
Ash % DM 2.8 1
Gross energy MJ/kg DM 17.2 *
 
Pig nutritive values Unit Avg SD Min Max Nb
Energy digestibility, growing pig % 87.7 *
DE growing pig MJ/kg DM 15.1 *

The asterisk * indicates that the average value was obtained by an equation.

References

Oyenuga, 1968

Last updated on 24/10/2012 00:45:22

References
References 
Fetuga, B. L. ; Oluyemi, J.A., 1976. The metabolizable energy of some tropical tuber meals for chicks. Poult. Sci., 55 (3): 868-873 web icon
Oyenuga, V. A., 1968. Nigeria's foods and foodstuffs. Ibadan, University Press
Peters, F. E. ; Tomono, M. ; Wills, P. A., 1960. Composition of some South Pacific foods. Food Res., 25: 211-228 web icon
Smith, O. B. ; Idowu, O. A. ; Asaolu, V. O. ; Odunlami, O, 1991. Comparative rumen degradability of forages, browse, crop residues and agricultural by products. Livest. Res. Rural Dev., 3 (2): 59-66 web icon
4 references found
Datasheet citation 

DATASHEET UNDER CONSTRUCTION. DO NOT QUOTE. https://www.feedipedia.org/node/543 Last updated on March 16, 2010, 17:13

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