Supplementary effect of Sweet Potato (Ipomoea batatas) Silage on Growth Performance and Carcass Traits of Local Lambs Grazing Natural Pasture in Tembaro District, Southern Ethiopia

Supplementary effect of Sweet Potato (Ipomoea batatas) Silage on Growth Performance and Carcass Traits of Local Lambs Grazing Natural Pasture in Tembaro District, Southern Ethiopia



Tegene Negesse, Gebremariam Gebremichael, Mohammed Beyan



Effect of supplementing Hawassi-83 sweet potato silage
(SPS) containing 70% vine and 30% tuber on growth performance and
carcass traits of grazing lambs were evaluated through on-farm feeding
trial in Tembaro district, SNNPR, Ethiopia. Treatment diets formulated
were: T1= grazing alone; T2, T3 and T4 were grazing plus SPS
supplemented (DM basis) at 1, 2 and 4% of lamb’s body weight,
respectively. At the age of 120 days after planting, vine cuttings were
harvested at 3 cm above the ground and wilted under sunlight for 12 hrs.
The tubers and vines were then chopped and mixed at the ratio of
70%:30% ( vine:tuber) and put in an air tight linen sack lined with
plastic sheet, compacted with wooden stick, tightened with a rope and
covered with plastic sheet to ensure anaerobic fermentation and ensiled
for 30 days. Samples of natural pasture (NP) from the grazing area were
harvested at the beginning and end of the trial. Five lambs (5-6
month-old; 14.3±0.5kg) were randomly assigned to each of the four
treatment diets and fed for 84 days. Crude protein content of SPS was
14.07% and that of the NP at the beginning and end of the trial were
10.73 and 8.13%, respectively; and in-vitro DM digestibility of SPS was
84.74% and that of NP at the beginning and end of the trial were 65.4
and 51.77%, respectively. The DM intakes of lambs significantly
(p<0.05) increased from 151.4 to 620.2g/head/d as the level of
supplementation increased from T2 to T4. Average daily body weight gain
(36.7, 60.5, 87.1 and 119.5 g/head/d) among treatments (T1



http://ijeab.com/upload_document/issue_files/23%20IJEAB-OCT-2016-12-Supplementary%20effect%20of%20Sweet%20Potato%20(Ipomoea%20batatas)%20Silage%20on%20Growth%20Performance%20and%20Carcass%20Traits%20of%20Local%20Lambs%20Grazing%20Natural%20Pasture%20in%20Tembaro%20District,%20Southern%20Ethiopia.pdf



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