The Effects of Adding Urea or Urea + Molasses in Some Sorghum Varieties Harvested at Dough Stage on Silage Quality and Digestible Dry Matter Yield

Authors : Murat DEMİREL

Pages : 29-37

View : 25 | Download : 14

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :The aim of this study was to evaluate the effects of the addition of 0.5% urea or 0.5% urea plus 4% molasses into some sorghum varieties insert ignore into journalissuearticles values(Gözde, P-988, Grazer and Grass-II); harvested at the dough stage on silage quality, in vitro dry matter insert ignore into journalissuearticles values(DM); digestibility and digestible DM yields. Triplicate silage samples from each variety and treatment group, a total of 36 silage samples, were prepared in 1 l mino-silos and incubated for 90 days. Silage DM and crude protein insert ignore into journalissuearticles values(CP); levels ranged from 29.56 to 33.46%, and from 7.16 to 12.63%, respectively. Addition of urea or urea + molasses increased CP, and urea + molasses increased DM but decreased the NDF content of all silages insert ignore into journalissuearticles values(P < 0,05);. Silage pHs were between 4.08 and 4.71, and the addition of urea and urea + molasses increased silage pH insert ignore into journalissuearticles values(P < 0,05);. Lactic, acetic and butyric acid concentrations of silages, on DM bases, ranged from 3.50 to 8.01%; from 0.58 to 1.44% and from 0.01 to 0.14%, respectively. The addition of urea and urea + molasses increased the lactic acid and decreased the propionic acid concentration of silages insert ignore into journalissuearticles values(P < 0,05);, although butyric acid concentrations were not affected. Urea supplementation did not affect acetic acid concentrations, and urea + molasses increased the acetic acid concentration of silages. In vitro DM digestibilities of Gözde, P-988, Grazer and Grass-II varieties were 52.85, 54.20, 54.96 and 54.39%, respectively. The addition of urea + molasses to Gözde increased in vitro DM digestibilities, but urea and urea + molasses addition decreased in vitro DM digestibilities in other varieties insert ignore into journalissuearticles values(P < 0,05);. The P-988 variety had the highest digestible DM yield insert ignore into journalissuearticles values(804.38 kg/decare);insert ignore into journalissuearticles values(P < 0,05);. In conclusion, the P-988 sorghum variety seemed to be the best suited Van ecological conditions based on silage fermentation quality and digestible DM yield.
Keywords : Sorghum silage, urea and molasses supplementation, in vitro digestibility, digestible dry matter yield