Abstract:
This work is conducted to evaluate the chemical composition of two
samples of sorghum straw rain-fed and irrigated, by adding urea 4%, molasses
5%, and mixture of urea and molasses 2.5% to evaluate protein, starch, fat, ash,
fiber, and moisture percentages.The Duncan multiple range test was used to test
differences between means. The samples were analyzed in the laboratory of
Ministry of Agriculture, Animal Wealth and Irrigation, Khartoum state, during
July, 2015. The results of the analysis revealed that using urea had significant
effect to increase protein percentage 15.77% in rain fed sorghum straw were
recorded, while in irrigated sorghum straw there were no significant difference,
in adding urea or molasses 16.76 % and 16.58 % respectively. The result
showed that adding molasses had significant increase of starch percentage in the
two samples of sorghum straw, but adding mixture molasses and urea decrease
starch percentage compare with control in irrigated sorghum straw, while adding
urea or molasses had the same effect in rain fed sorghum straw. Also using
molasses shown significant effect of fat percentage in rain-fed straw, while there
were no significant differences between using urea or molasses in irrigated
sorghum straw. Using molasses had significant effect to reduce Ash percentages
in both types of sorghum straw and recorded 4.25 %, and 1.75 % in irrigated and
rainy sorghum respectively, compared with other additives. The result revealed
that fiber percentage was decreased in all treatments in rain-fed sorghum straw,
but there were no significant differences between treatments in irrigated
sorghum straw. Also molasses had significant effect to increase moisture
percentage in the two samples of sorghum straw, and the other treatments had
the same effects.
