S. L. Abdurrahaman, S. A. Abubakar, F. A. Hamza, A. M. Umar, I. R. Muhammad


An experiment was conducted to evaluate the ensiling quality of Rice straw (RS) using graded levels of Molasses, Salt and Urea as additives. Rice straw collected from the University Farm after harvest in 2016 growing season was chopped to 2 – 3 cm sizes, mixed with the three additives at 5g, 7.5g and 10g each. Nine treatments; T1 (RS + 5g Molasses), T2 (RS + 7.5g Molasses), T3 (RS + 10g Molasses), T4 (RS + 5g Salt), T5 (RS + 7.5g Salt), T6 (RS + 10g Salt), T7 (RS + 5g Urea), T8 (RS + 7.5g Urea) and T9 (RS + 10g Urea) were replicated three times and then ensiled for 21 days. The results revealed significant (p<0.05) difference in all parameters evaluated. The result on pH showed a linear increase with the exception of T3 (RS + 10g molasses). The pH varied from 4.04 in T3 (RS + 10g Molasses) to 7.02 in T9 (RS + 10g Urea).  In terms of physiochemical characteristics T1 (RS + 5g molasses), T2 (RS + 7.5g molasses) and T3 (RS + 10g molasses) resulted in better quality silage with very sweet to sweet aroma, yellowish green to pale yellow colour, high  DM (90.76 - 93.35%),  OM (89.55  - 92.05%),  CF (29.06  - 37.32%) and  NFE (53.52  - 62.71%), with moderate %CP (6.16  - 6.56%), %EE (0.53  - 1.77%), %NDF (53.52  - 62.71%) and ash (1.21  - 1.30%) content. T4 (RS + 5g Salt), T5 (RS + 7.5g Salt) and T6 (RS + 10g Salt) results in silage with putrid to pleasant aroma, light to dark brown colour low CP (5.47 - 5.61%), %DM (88.60 - 91.93%) and Ash (0.81 - 1.85%) contents. While T7 (RS + 5g Urea), T8 (RS + 7.5g Urea) and T9 (RS + 10g Urea) had significantly (p<0.05) highest crude protein (9.40 - 14.18%), Ash (1.50 - 1.88%) and metabolisable energy (2143.54 - 2478.98 kcal/kg) among the treatments evaluated. Addition of additives to rice straw silage improved the silage physiochemical qualities and farmers should add molasses or urea at 7.5% for better silage production.


Molasses, Salt, Urea, Physiochemical, Ensiling Quality and Rice straw

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