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Paperback thorn (Acacia sieberiana)

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
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Common names 

Paperback thorn, flat top thorn, umbrella thorn

Synonyms 

Acacia abyssinica sensu auct., Acacia amboensis Schinz, Acacia davyi sensu auct., Acacia purpurascens Vatke, Acacia sieberana DC., Acacia sieberiana DC. subsp. vermoesenii (De Wild.)Troupin, Acacia vermoesenii De Wild.

Related feed(s) 
Description 

Tree up to 15 m high with light-coloured bark and often with a flat crown. The leaves, 10-15 cm long have straight white thorns at their base. The branches and often the leaves are covered with yellow hairs. The flower heads are cream-coloured and spherical.

Nutritional aspects
Potential constraints 

No cases of prussic acid poisoning have been reported.

Ruminants 

The straight, often hairy pods, 8-12 cm long and 2-3 cm broad, are readily eaten by stock. The tips of young shoots are intensively browsed particularly toward the end of the dry season.

In sheep fed maize stover supplemented with acacia pods, lower growth rates were reported with Acacia sieberiana than with Acacia tortilis and Faidherbia albida and it was considered to be a less suitable protein source than those species (Tanner et al., 1990).

Palatability

In a comparison with other Acacia species (Acacia karroo, Acacia nilotica, Acacia tortilis, Acacia rhemniana) in South Africa, leaves of Acacia sieberiana were found to be the most palatable for sheep and goats (Mokoboki et al., 2011).

Nutritional tables

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).

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

Last updated on 24/10/2012 00:44:44

Main analysis Unit Avg SD Min Max Nb
Dry matter % as fed 47.3 2.5 44.4 48.8 3
Crude protein % DM 14.6 4.4 8.4 21.7 6
Crude fibre % DM 25.7 2.9 22.4 29.8 5
NDF % DM 44.6 44.0 45.2 2
ADF % DM 38.3 32.4 44.1 2
Lignin % DM 19.8 11.4 28.2 2
Ether extract % DM 4.8 1.7 3.2 6.3 4
Ash % DM 8.6 2.8 5.5 11.6 5
Gross energy MJ/kg DM 18.7 *
 
Minerals Unit Avg SD Min Max Nb
Calcium g/kg DM 18.3 7.7 11.3 25.0 4
Phosphorus g/kg DM 1.8 1.3 1.0 3.6 4
Potassium g/kg DM 9.0 6.1 3.3 15.4 3
Magnesium g/kg DM 3.4 0.8 2.9 4.3 3
 
Secondary metabolites Unit Avg SD Min Max Nb
Tannins (eq. tannic acid) g/kg DM 2.5 1
 
Ruminant nutritive values Unit Avg SD Min Max Nb
OM digestibility, Ruminant % 69.5 *
Energy digestibility, ruminants % 66.5 *
DE ruminants MJ/kg DM 12.4 *
ME ruminants MJ/kg DM 10.0 *
a (N) % 22.0 1
b (N) % 52.0 1
c (N) h-1 0.025 1
Nitrogen degradability (effective, k=4%) % 42 *
Nitrogen degradability (effective, k=6%) % 37 *

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

References

CIRAD, 1991; Fall Touré, 1991; INFIC, 1978

Last updated on 24/10/2012 00:44:44

Main analysis Unit Avg SD Min Max Nb
Dry matter % as fed 90.4 3.9 84.8 94.5 5
Crude protein % DM 12.3 3.4 8.4 17.5 5
Crude fibre % DM 23.9 3.3 20.2 26.5 3
NDF % DM 35.8 34.7 37.0 2
ADF % DM 28.4 28.2 28.5 2
Lignin % DM 5.8 1
Ether extract % DM 1.2 0.5 0.7 1.9 4
Ash % DM 5.9 2.0 4.4 9.0 5
Gross energy MJ/kg DM 18.2 *
 
Minerals Unit Avg SD Min Max Nb
Calcium g/kg DM 4.4 3.1 1.0 7.2 3
Phosphorus g/kg DM 1.8 0.4 1.4 2.2 3
Potassium g/kg DM 6.6 0.3 12.9 2
Sodium g/kg DM 0.5 1
Magnesium g/kg DM 2.2 2.1 2.4 2
Manganese mg/kg DM 17 1
Zinc mg/kg DM 30 1
Copper mg/kg DM 4 1
Iron mg/kg DM 68 1
 
Amino acids Unit Avg SD Min Max Nb
Alanine % protein 2.1 1
Arginine % protein 3.8 1
Aspartic acid % protein 19.4 1
Glutamic acid % protein 6.7 1
Glycine % protein 3.3 1
Histidine % protein 1.9 1
Isoleucine % protein 1.7 1
Leucine % protein 3.0 1
Lysine % protein 2.7 1
Methionine % protein 0.1 1
Phenylalanine % protein 1.6 1
Proline % protein 13.1 1
Serine % protein 1.3 1
Threonine % protein 1.4 1
Tyrosine % protein 0.5 1
Valine % protein 2.6 1
 
Ruminant nutritive values Unit Avg SD Min Max Nb
OM digestibility, Ruminant % 86.5 *
Energy digestibility, ruminants % 83.3 *
DE ruminants MJ/kg DM 15.1 *
ME ruminants MJ/kg DM 12.3 *
ME ruminants (FAO, 1982) MJ/kg DM 8.8 1
Nitrogen digestibility, ruminants % 57.6 1
a (N) % 68.6 1
b (N) % 25.6 1
c (N) h-1 0.033 1
Nitrogen degradability (effective, k=4%) % 80 *
Nitrogen degradability (effective, k=6%) % 78 *
 
Pig nutritive values Unit Avg SD Min Max Nb
Energy digestibility, growing pig % 52.5 *
DE growing pig MJ/kg DM 9.5 *

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

References

Blair Ralns, 1963; CIRAD, 1991; Ngwa et al., 2002; Tanner et al., 1990; Walker, 1975

Last updated on 24/10/2012 00:44:45

References
References 
Datasheet citation 

DATASHEET UNDER CONSTRUCTION. DO NOT QUOTE. http://www.feedipedia.org/node/340 Last updated on April 26, 2012, 12:39

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