Effect of different levels of the dried poultry manure as NPN source on the nutritive value of wheat straw silage for lamb feeding
journal of kerbala university,
2007, Volume 3, Issue 4, Pages 215-221
AbstractThis experiment was conducted by using15 local Arabi lamb ,to study the effect of the level of the dried poultry manure (DPM) , ( nil , low and high levels ) as a nitrogen source on the nutritive value of wheat straw silages treated with 10% molasses, The three silages were supplemented with 300g/day of concentrate. The study involved two experiments to determine the average dry matter intake of silages and the total digestibility of dry mater, crude protein and crude fiber . All silages were of good quality according to good flavor and low PH values of 4.1,4.3 and 4.5 for the untreated silage , treated silages with low and high level of DPM respectively , all of these silages were palatable through minimizing the preliminary period to less than the expected one , as well as there was no harmful signs and disorders had seen on the experimental lambs due to feeding treated silages . Chemical analysis showed a reduction in crude fiber content , especially for the DPM treated silages , which at the same time showed a noticeable increase in crude protein content . Results showed that an increasing N content of wheat straw silages due to the addition of DPM at ensiling time improved the voluntary intake of silage dry matter significantly (P< 0.01 ) and that better results ( P< 0.05 ) were obtained by using the low level of DPM as compared to the high level . Data of digestibility determinations showed a significant improvement (P<0.01) in the digestibility coefficients of dry matter , crude protein and crude fiber due to the addition of DPM at ensiling time. better digestibility ( P< 0.01) of crude fiber and crude protein were obtained as a result of using DPM at high level , but better digestibility (P<0.05)of dry matter was obtained at the low level of DPM.These results had clearly pointed out that the addition urea as a nitrogen source to silages made from roughages and plant residuals of low nutritive value could be efficiently substituted by dried poultry manure at ensiling time .
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