Effect of ammonia or urea treatment of straw on chewing behaviour and ruminal digestion processes in non-lactating dairy cows

Digestibilidade de dietas contendo silagem de capim-elefante amonizado e farelo de cacau ou torta de dendê em ovinos

“…Houve acréscimo (P<0,05) de PB em g por kg de MS consumida (Tabela 6) com a amonização, o que poderia ter aumentado a digestibilidade da parede celular (Chermiti et al, 1994), pois a uréia é uma fonte de nitrogênio rapidamente degradável no rúmen, quando comparada ao farelo de soja (Ferrel et al, 2001). Contudo, a utilização do N adicionado depende da disponibilidade de carboidratos fermentáveis.…”

Effect of enset (Ensete ventricosum) leaf supplementation on feed intake, digestibility, nitrogen utilization and body weight gain of sheep fed untreated or urea and calcium oxide-treated wheat straw

“…On the other hand, Chermiti et al (1994) reported increased microbial protein synthesis with urea treatment of wheat straw. According to Clark et al (1992) decreases in OM intake, OM and fibre digestibilities in the rumen, energetic uncoupling of ruminal fermentation or shortage of N constituents other than ammonia, may be the reasons for lack of increased passage of microbial protein to the small intestine.…”

Effects of diet and roughage quality, and period of the day on diurnal feeding behaviour patterns of sheep and goats under subtropical conditions

“…Sheep were randomly allocated to either IRQ (n = 4) or PRQ (n = 3) and given approximately 2 kg dry matter (DM) of either IRQ or PRQ veld hay at 10:00 h and 15:00 h daily for the whole duration of the trial. Chermiti et al [7] and Warly et al [10] used similar numbers of experimental animals. In Exp 2, eighteen Nguni goats were divided into two groups that comprised of nine light mass (average initial body mass of 16.94±2.51 kg) and nine heavy mass (average initial body mass of 33.6± 5.00 kg) goats.…”

“…Reduction in live weight loss translates to a reduction in mortality of livestock, which may be viewed as a great achievement in drought stricken areas. The current authors are unaware of studies that determine how roughage intake and improvement of dietary roughage quality influence diurnal feeding behaviour in goats and sheep fed on non-supplemented urea-treated tropical veld hay, except for two studies by Chermiti et al [7] and Trach et al [8] in cattle fed on supplemented urea treated wheat and rice straw, respectively. Few studies, if any, done in subtropical and tropical Africa have evaluated all three major feeding behaviours during the day and at night at once.…”