Cassava Leaf Silage and Cassava Peel As Dry Season Feed for West African Dwarf Sheep.

Abstract

The study was undertaken to evaluate the effect of feeding cassava leaf silage (CLS)
and cassava peels (CP) on performance characteristics and some haematological parameters of
West African Dwarf (WAD) sheep. Nine sheep were randomly allotted into three treatments, with
three sheep per treatment. The control diet (T1) consisted of grass, while sheep in (T2) and (T3)
were fed with CLS and CP at 1.5% of their body weight, respectively for a period of seven weeks.
The average daily weight gain, body length, withers height and heart girth were measured at
weekly intervals. In addition, blood samples were collected at the beginning and end of the
experiment and analyzed for PCV, WBC, Lymphocyte and Neutrophil count. Statistical analysis
showed that animals fed with CP had a significant weight gain (P<0.05), while there was no
significant difference in wither height, body length and heart girth, respectively. However, there
was a significant differences (P<0.05) in the haematological parameters measured. No mortality
was recorded during the experiment.

Keywords : cassava leaf silage, growth performance, haematology, WAD sheep.

Full text

© 2013. Anaeto, M., Sawyerr A.F., Alli, T.R., Tayo, G.O., Adeyeye, J.A. & Olarinmoye, A.O. This is a research/review paper,
distributed under the terms of the Creative Commons Attribution-Noncommercial 3.0 Unported License
http://creativecommons.org/licenses/by-nc/3.0/), permitting all non commercial use, distribution, and reproduction in any
medium, provided the original work is properly cited.
Global Journal of Science Frontier Research
Agriculture and Veterinary Sciences
Volume 13 Issue 2 Version 1.0 Year 2013
Type : Double Blind Peer Reviewed International Research Journal
Publisher: Global Journals Inc. (USA)
Online ISSN: 2249-4626 & Print ISSN: 0975-5896
Cassava Leaf Silage and Cassava Peel as Dry Season Feed for
West African Dwarf Sheep
By Anaeto, M., Sawyerr A.F., Alli, T.R., Tayo, G.O., Adeyeye, J.A.
& Olarinmoye, A.O.
Babcock University
Abstract -
The study was undertaken to evaluate the effect of feeding cassava leaf silage (CLS)
and cassava peels (CP) on performance characteristics and some haematological parameters of
West African Dwarf (WAD) sheep. Nine sheep were randomly allotted into three treatments, with
three sheep per treatment. The control diet (T1) consisted of grass, while sheep in (T2) and (T3)
were fed with CLS and CP at 1.5% of their body weight, respectively for a period of seven weeks.
The average daily weight gain, body length, withers height and heart girth were measured at
weekly intervals. In addition, blood samples were collected at the beginning and end of the
experiment and analyzed for PCV, WBC, Lymphocyte and Neutrophil count. Statistical analysis
showed that animals fed with CP had a significant weight gain (P<0.05), while there was no
significant difference in wither height, body length and heart girth, respectively. However, there
was a significant differences (P<0.05) in the haematological parameters measured. No mortality
was recorded during the experiment.
Keywords :
cassava leaf silage, growth performance, haematology, WAD sheep.
CassavaLeaf Silage and Cassava Peel as Dry Season Feed for West African Dwarf Sheep
Strictly as per the compliance and regulations of :
GJSFR-D Classification : FOR Code: 110202, 070199

Cassava Leaf Silage and Cassava Peel as Dry
Season Feed for West African Dwarf Sheep
Anaeto, M. α, Sawyerr A.F. σ, Alli, T.R. ρ, Tayo, G.O. , Adeyeye, J.A. ¥ & Olarinmoye, A.O. §
Abstract -
The study was undertaken to evaluate the effect of
feeding cassava leaf silage (CLS) and cassava peels (CP) on
performance characteristics and some haematological
parameters of West African Dwarf (WAD) sheep. Nine sheep
were randomly allotted into three treatments, with three sheep
per treatment. The control diet (T1) consisted of grass, while
sheep in (T2) and (T3) were fed with CLS and CP at 1.5% of
their body weight, respectively for a period of seven weeks.
The average daily weight gain, body length, withers height and
heart girth were measured at weekly intervals. In addition,
blood samples were collected at the beginning and end of the
experiment and analyzed for PCV, WBC, Lymphocyte and
Neutrophil count. Statistical analysis showed that animals fed
with CP had a significant weight gain (P<0.05), while there
was no significant difference in wither height, body length and
heart girth, respectively. However, there was a significant
differences (P<0.05) in the haematological parameters
measured. No mortality was recorded during the experiment. It
can be concluded that CLS and CP are good feed resources
for maintaining sheep during the dry season.
Keywords : cassava leaf silage, growth performance,
haematology, WAD sheep.
I. Introduction
Nigeria is currently the world’s largest producer
of cassava crop (IITA, 2005). Peasant farmers mostly
grow cassava as a primary staple food but cassava is
also being used as a cash crop to produce industrial
ethanol, starches, tapioca, and livestock feeds.
Ruminants can be fed not only on cassava tuber, but
also the stem, leaves, peel and various by-products of
tuber processing such as residues from starch, “garri”
and “fufu”.
Hydrogen cyanide (HCN) toxicity is considered
to be a limiting factor in using high level of cassava
leaves in the diets of monogastric animal. However,
ruminants can neutralize the harmful effects of HCN
through the activities of rumen microbes and can
therefore utilize cassava leaves more efficiently.
According to Limon, 1992; Kayouli & Lee (2000)
silage making is an appropriate method to conserve
cassava leaf as feed for use during dry season feeding.
The introduction of cassava leave silage to
smallholder farmers in Indonesia was reported by
Marjuki et al (2008), in Malawi IITA (2004) but the use of
cassava leave as forage plant has not been popular in
Nigeria. Cassava peels form the bulk of residue from
cassava root after post harvest and processing. It is a
good source of energy in ruminant feeding systems,
serving either as the main basal diet or as a
supplement.
Many researchers have reported that dietary
components have measurable effects on the blood
hence blood constituents are widely used in nutritional
evaluation and survey of human and animals. The
general objective of this study was to evaluate the effect
of cassava leaf silage and dried cassava peels on
performance of WAD sheep and on some blood
components.
II. Materials and Methods
a)
Experimental Location
The study was carried out at Babcock University
Poultry and Livestock Farm located in Ilara-Remo of
Ikenne local government area of Ogun state. This region
is in the rainforest zone of Nigeria with an annual rainfall
of about 1500 mm and mean temperature of 27ºC. Ilara
is in the south-west geopolitical zone of Nigeria and falls
on latitude of 6º54’N of the equator and longitude
3º42’E of Greenwich.
b)
Management of the Experimental Animals
Nine WAD sheep having an average body
weight of between 8.67 and 9.33 kg were used for the
seven weeks feeding trial. The sheep were tagged and
allowed 14 days adjustment period before the onset of
the study. All the animals were treated for external and
internal parasite with ivermectin according to their body
weight (1ml per 25kg). Oxtetracycline L.A. injection
(200mg/ml) was administered as prophylaxis.
c)
Experimental Diets and Method of Feeding
The cassava leaf silage was prepared by cutting
about 30 cm of the cassava top. It was sun dried for 24
heep are valuable domestic animals in the tropical
livestock production system. Sheep in the tropics
account for approximately 34% of the total
population of the world grazing ruminants and represent
a valuable resource in most developing world. (Njidda
and Kibon, 2004). The lack of good nutritive feed during
dry season is partly responsible for low productivity and
reproduction. Thus, sheep can be sustained with
cassava leaf silage and cassava peels during difficult
months of the dry season.
S
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©20
13 Global Journals Inc. (US)
Author
α σ ρ¥ §
:School of Agriculture and Industrial Technology,
Babcock University, Ilishan-Remo, Ogun State, Nigeria.
E-mail : manaeto@yahoo.com
Ѡ
Ѡ

hours and then chopped about 2-4cm, sprinkled with
5% molasses and sealed in polyethylene bags. Silage
samples were taken after 30 days of ensiling and
proximate analysis of cassava silage and cassava peel
were carried out following the procedure of AOAC
(1990). The cassava peels was bought from the market.
The sheep were assigned to three dietary
treatments in a completely randomized design (CRD).
Each treatment had three sheep that were allowed to
graze freely during the day between 8:00am-12:00pm
and 14:00pm-16:00pm and upon return, were fed with
CLS (T2) or CP (T3) at 1.5% of their body weight while
the control (T1) was not given supplement. All the sheep
had access to clean drinking water. Weekly body
measurements; weight gain, withers height, body length
and heart girth were measured and recorded. Also, the
physical characteristics such as colour, mould growth,
smell and pH levels of cassava silage were evaluated.
d)
Hematological Analysis
The animals were bled from the jugular vein at
the beginning and end of the experiment and the blood
samples were kept in bottles containing Ethylene
Diamine Tetra Acetic acid (EDTA) and were sent to the
laboratory for packed cell volume (PCV), white blood
count (WBC), lymphocyte and neutrophil count.
e)
Statistical Analysis
The data obtained were subjected to Analysis of
Variance ANOVA using (SAS, 1997) and the significant
difference between treatments means were separated
using LSD test at 5% level of significance.
III. Results and Discussion
The proximate analysis of the cassava leaf
silage and cassava peel is presented in Table 1. The dry
matter and crude protein values of the cassava leaf
silage in this study are similar in values to (Marjuki et al.
2008), but the CP value is less than 24.7% reported by
(Adegbola and Okonkwo, 2002). Devendra (1997),
attributed the apparent lack of interest in the use of
cassava leaves for feeding ruminants to inadequate
appreciation of the relative high crude protein content of
the leaves. The ether extract and crude fibre of the CLS
were within the acceptable range (4.0-15.2 and 4.8-15.4)
respectively but, the ash content was lower compared to
(Smith, 1992). The dry matter and crude fibre of the CP
were similar to those reported by (Adeloye et al. 2006).
The protein content was also within the range
2.8-6.5, however, the ether extract was higher and the
ash content lower.
The silage pH value was acidic 4.36. Based on
the greenish brown colour, absence of mould and a
pleasant smell, the silage was considered to be of good
quality.
Table 1 :
Proximate analysis of cassava leaf silage and
cassava peels
Constituent % CLS CP
Dry matter 30.39 29.2
Crude protein 15.46 5.72
Crude fibre 13.86 9.8
Ether extract 4.80 9.37
Ash 2.20 2.23
The effect of the feeding experiment on the
performance of WAD sheep is shown in Table 2. The
total weight gain of the sheep in T1, T2 and T3 were
significantly different (P<0.05) from each other. The
sheep fed cassava peels (T3) gained more weight than
T2 and T1. This finding agrees with Fomunyan and
Meffeja (1987) who fed sheep on three levels of dried
cassava peels and growth rate increased linearly with
increasing dietary levels of cassava peels. Sheep on
cassava leaf silage did better than the control. The result
also agrees with Fernandez and Preston (1978), who
reported an increase in daily weight gain for ruminants
fed with cassava foliage. Feeding cassava leaf silage
has been reported to increase body weight gain
(Bunyeth & Preston, 2006; Yousuf et al 2007). The
sheep grazed on grass alone suffered a weight loss due
to scarcity of grass. Therefore, for optimum production,
grazing animals should be given supplement such as
CLS and CP during the dry season as rumen
degradability of cassava leaves and cassava peels is
high 84% and 83%. The body length, heart girth and
wither height were not significantly different. Similar
observations were reported by Ahmed (1977) who
observed no effect on the body length and withers
height of sheep fed dry cassava peel diets. There was
no mortality recorded during the feeding experiment.
Supplementing cassava leaf silage and cassava
peel did not affect the sheep as the animals were
apparently healthy and grazing freely.
Table 2 :
Performance of WAD sheep fed cassava leaf silage and cassava peels
Parameters T1 (Control) T2(CLS) T3(CP)
Initial body weight (kg) 9.33 9.00 8.67
Final body weight (kg) 8.87 11.00 11.00
Total body weight (kg) -0.66±0.88c 2.00±0.58ab 2.33±0.88a
Average daily gain (g) -13.5c 40.8ab 47.6 a
Body length(cm) 1.33±0.88 2.67±0.88 2.33±0.88
Wither height(cm) 2.67±0.33 1.33±0.67 1.00±0.58
Heart girth(cm) 1.33±0.67 1.00±0.58 1.00±0.58
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Cassava Leaf Silage and Cassava Peel as Dry Season Feed for West African Dwarf Sheep
Mortality - - -
abc: means within the same row with different superscripts are significantly different

The haematological analysis as shown in Table
3 indicates that the initial and final analysis on the pack cell volume and the white blood count were significantly
different (P<0.05).
Table 3 :
Haematological analysis of the WAD sheep fed cassava leaf silage and cassava peel
Parameters
Initials
Final
T1
T2
T3
T1
T2
T3
PCV (%)
31b
27b
31b
23a
23a
25a
WBC (x106/cm3)
5.5
a
6.06
a
7.76
a
9.83
b
11.43
b
10.23
b
Lymphocyte
68
57a
63
72
75b
65
Neutrophil
32
43
37
28
25
35
abc: means within the same row with different superscripts are significantly different(P<0.05)
There was a significantly different (P<0.05)
between the initial and final
PCV also, the white blood
count was significantly different (P<0.05). The final WBC
count although higher was within the normal range for
sheep similar to (Reece & Swenson, 2004). According to
Olorunnisomo et al 2012) the white blood cells count is
an indicator of immune response to infectious or toxic
substances in the organism and a high count is an
indication of pathogenic infection or presence of
antigens in the organism. The final lymphocyte count in
T2 was higher and the
neutrophil was relatively low.
However, the animals were apparently healthy.
This study showed that the two feeds sustained
the body weight of the animals and there was no
adverse effect on the production parameters measured
and the animals were apparently healthy. Sheep in the
control recorded a loss in body weight during the period
of experiment. It is therefore, recommended to
supplement animals with cassava leaf silage and
cassava peels during the dry
season when feed scarcity
can be a challenge.
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Yousuf, M.B., Belewu, MA, Daramola, JO., and