The potential of isobutyraldehyde monourea (propanal, 2-methyl-monourea) as a nonprotein nitrogen source for ruminant animals

Abstract

Edmonton' Atberta'Mathison, G. W., Soofi-Siawash, R. and Worsley, M. 1994. The potential of isobutyraldglVd9-1o-1o.urya (propanal' 2-methylmonogrea, as a nonprotein ttit"og.n source foi ruminant animals. Can. J. Anim. Sci. 74: 665-6'74. Experiments. were carried out with sheep and in vitro to evalu-ate isobutyraldehyde monourea (IBMU; propanal-2-methyl-monourea) as a slorp_-release nit-ro-gen source for ruminant animals. Examination of the co-pound for carbon, nlarogen, and nitrogen composition and infrared' NMR and mass spectral analyses indicated that IBMU was present in significant ainounts. Ten sheep were rar-rdolnlY assigrred to diets containing bromegrass tray anO corn grain and the following nitrogen Jupptementation treatnents: (1) control, (2) urea' (3) soybean meal' (4) cfroh me."al and (5) fslvlU, #ittr ttt. protein supplelments-providiirg approximately 25% of the nitrogen intake. Similar treatrnents were also prepared and evaluated in vitro, with thetiception that ryheat siqw rathgl than br.omggrass.hay was used in the incubation.fne algesiiUiiity of nilrogen in the ration containing IBMU *., higher (P < 0.05) than its digesliqqiry in the other ratiojls when measurements were cond"ucted with sheep over ttuei 14-d 130 to 185'C (10"C min-'). A helium carrier gas was used.Samples for ammonia were also taken at the same time as VFA samples and stored at -20'C for analysis. Baetz et al. (1979) reported that rumen ammonia concentrations in frozen samples were stable for at least 3 wk and all samples were analyzed within this period. Rumen ammonia levels were analyzed using the colorimetric technique described by Fawcett and Scott (1960).In Vitro Measurements DM disappearance and ammonia accumulation were measured by in vitro incubations. The mixture of substrates was sirnilar to that used in the sheep feeding trial, with the exception that wheat straw (2.6% crude protein) was substituted for the brome hay to reduce the N content of the incubated substrates. Approximately 0.3 g DM was included in each incubation tube, and incubations were carried out according to the procedure of Marten and Barnes (1979). Control tubes and those with supplemental nitrogen thus contained approximately 2.4 and 3.5 mg N, respectively, with 40% of the total N arising from the supplemental N source. Incubations were conducted at 39"C in 50-mL plastic tubes containing buffer solution (McDougall 1948)

Performance of growing and finishing cattle supplemented with a slow-rlease urea product and urea

“…In the past, several slow-release urea (SRU) products such as biuret (Waite and Wilson 1968;Löest et al 2001), urea-corn-carboxy-resin (Huston et al 1974), starea (Bartley and Deyoe 1975), urea-formaldehyde (Prokop and Klopfenstein 1977), Uromol ® (Malik et al 1978), urea coated with linseed oil and talc (Forero et al 1980), lactosylurea (Forman et al 1982), urea-polyvinyl-alcohol (Sommer et al 1985), urea-lignocellulose complex (Chahil et al 1986;Caneque et al 1998), Uromalt ® (Virk et al 1989), and isobutyraldehyde monourea (Mathison et al 1994) have been developed and evaluated for ruminant nutrition, but variable results from either in vitro and(or) in vivo experiments have been reported.…”

Slow-release non-protein nitrogen sources in animal nutrition: A review

“…"Biuret" [ 8 ], Starea [ 9 ], urea-formaldehyde [ 10 ], uromol [ 11 ], urea coated with flaxseed oil and talc [ 12 ], lactosylurea [ 13 ], polyvinyl alcohol urea [ 14 ], urea and lignocellulosic complex [ 15 ], uromalt [ 16 ], isobutyraldehyde monourea [ 17 ], Epogen [ 18 ], microcapsules [ 19 ], and calcium chloride-bonded urea [ 20 ].…”

Fontes de nitrôgenio, níveis de forragem e métodos de processamento de milho em rações para tourinhos da raça Nelore terminados em confinamento

“…Na tentativa de sincronizar a produção ruminal de amônia com a digestão de energia no rúmen, vários estudos foram realizados buscando o desenvolvimento de compostos de liberação controlada de uréia. No entanto as fontes de NNP desenvolvidas tais como a isobutilidina monouréia (MATHISON et al, 1994), o biureto (LÖEST et al, 2001e CURRIER et. al, 2004, a uréia tratada com formaldeído (PROKOP;KlOPFENSTEIN, 1977) e a uréia recoberta por óleo de semente de linhaça (FORERO et al, 1980), não têm se mostrado superiores à uréia convencional em termos de desempenho animal.…”