Print ISSN: 2077-5822

Online ISSN: 2618-1479

Keywords : silage

Effect of Substitution of Urea With Different Type and Levels of Ruminant Manure on Nutritive Value of Rice Straw Silage

Ali Ameen Saeed; Saja Intisar Abid

Al-Qadisiyah Journal For Agriculture Sciences, 2019, Volume 9, Issue 2, Pages 206-214
DOI: 10.33794/qjas.2019.167059

This study was conducted in Nutrition Lab. to investigate the effect of the type and level of substitution of urea with ruminant manure, M (sheep, cow and buffalo) on basis of nitrogen (N) content on the nutritive value of rice straw silage (RSS). Accordingly silages were nominated as, S-RSS, C-RSS and B-RSS. Urea (U) was substituted with dried manure at 6 combinations, 100:0, 90:10, 80:20, 70:30, 60:40 and 50:50 of U:M. Silage samples were prepared by treating chopped straw with pre-treated solution contained 10% low quality debis and 2% urea. Results showed that lower (P˂0.01) DM loss (11.4%) was observed in S-RSS, and with addition of urea only (3.6%).
Samples of S-RSS and C-RSS recorded higher (P˂0.01) Fleig points (Fp) as compared with those prepared by the addition of B-RSS, 60.42, 55.58 and 49.59 respectively. Reduction (P˂0.01) in this parameter was noticed in samples prepared with a combination of 100:0. Aerobic stability (AS) was a reduced (P˂0.01) in samples prepared by addition of S-RSS by 15 and 13 hours in comparison with samples of C-RSS and B-RSS respectively. Samples prepared with combination of 100:0 were prior (P˂0.01) as compared with other samples.
Results also showed an increase (P˂0.01) in in vitro digestibility of organic matter (IVOMD) in samples of S-RSS in comparison with samples prepared by addition of C-RSS and B-RSS, 49.99, 44.59 and 42.77% respectively. Samples prepared with combination of 100:0 recorded lower (P˂0.05) in vitro digestibility of dry matter (IVDMD) as compared with combinations of 70:30 and 60:40 of U: M, 40.52, 45.36 and 45.94% respectively.

The Effect of Addition Urea and Ensiling Period on The Quality and Chemical Composition of Wheat Straw Silages

Ali A. Saeed

Al-Qadisiyah Journal For Agriculture Sciences, 2012, Volume 2, Issue 2, Pages 1-14
DOI: 10.33794/qjas.2012.68150

An in vitro experiment is conducted to study the effect of adding urea (0, 1.5
and 3% on dry matter, DM basis) and period of ensiling (15, 30, 45 and 60 days)
on the quality and chemical composition of wheat straw (WS) silages. All
samples are treated with 10% of molasses.
Results have shown that the addition of urea at the lower rate alters the color of
silages from yellow to greenish yellow with the appearance of fermented fruit
odor in samples ensiled for 60 days, but doubling urea level alters the color to
dark yellow and brown as the ensiling period is proceeded with the appearance
of ammonia odor.
The estimated Fleig points decline due to increasing the level of urea, but the
proceeding of ensiling period increases these points. pH of silages are increased
(P<0.01) due to urea treatment but it decreases (P<0.01) due to proceeding of
ensiling period.
Regarding the compositional changes, results have shown that the addition of
urea decreases (P<0.01) crude fiber (CF) and nitrogen free extract (NFE)
contents, but it increases (P<0.01) crude protein (CP) content. Proceeding
ensiling period decreases (P<0.01) CF and increases CP (P<0.05) and NFE
(P<0.01). Generally , better results are accomplished at the lower level of urea
and 60 days of ensiling.