Effects of Adding Coated Urea on in vitro Gas Production of Dairy Cow

Abstract

In this experiment the effects of different urea products (urea, Paraffin-sulfur Coated Urea (PSCU) and controlled release urea product (Optigen, Alltech Inc., Lexington, KY)) on rumen fermentation were investigated in dependence of different diet sources by using in vitro techniques. The experiment followed a completely randomized design using four N-source treatmentes (urea, Paraffin-sulfur Coated Urea, Optigen and canola meal) in four diets (wheat straw+ %3 isonitrogenous of each N-source, barley grain+ %3 isonitrogenous of each N-source, barley grain+ molasses+ %3 isonitrogenous of each N-source and formulated TMR diets for dairy cow+ %3 isonitrogenous), the cumulative gas production (96 hours) influenced by diets and N-source treatments was different, which was higher gas production in formulated TMR diets for dairy cow and least gas production in wheat straw. The result indicated that Optigen (90.82) and then PSCU (90.81) the highest gas producer in the formulated TMR diets for dairy cow and the canola meal (69.04) and urea (69.43) had the least gas production in wheat straw (P<005). As a result, little difference between treatments for slow-release urea with control (canola) was observed in animal experiments. And therefore reducing feed costs and increasing the efficiency of the rumen microorganisms can be used NPN sources as a replacement for part of dietary protein.

Dietary polymer-coated urea enhances the goats lactational performance, excretion of microbial purine derivatives and blood metabolites in the semi-arid zone of Iran

“…Polymer-coated urea (PCU) is one of the newest coated urea products that coated with oil materials. Th is product showed positive effects in slowing rate of urea degradation urea compare with other expensive coated -urea products in previous studies (Mazinani, Naserian, Mesgaran, & Valizadeh, 2018).…”

“…Cherdthong et al (2011) reported an increase in total milk yield by dairy cows fed urea-calcium. Mazinani et al (2018) reported that supplementing urea can elevate blood urea concentration more than canola meal and it is due to rapid hydrolysis of urea to ammonia in the rumen .excess ammonia is absorbed into the blood from the rumen wall and then taken to the rumen where urea is usually detoxified. part of this urea can recycle by the rumen while the excess amount is excreted in the urine (Lapierre & Lobley, 2001).…”

Efek penggunaan produk gelatinisasi empulur gewang (Corypha utan lamk) dengan urea terhadap pertumbuhan sapi bali yang mengkonsumsi rumput alam

“…Penghambatan hidrolisis urea dapat dilakukan melalui pencampuran urea dengan gelatin (Paengkoum and Bunnakit, 2012). Melalui gelatinisasi terjadi peningkatan degradabilitas karbohidrat dalam ransum dan alternatif lainnya menurunnya laju degradasi urea (Mazinani et al, 2018).…”

Effects of rumen-bypass protein supplement on growth performance, hepatic mitochondrial protein complexes, and hepatic immune gene expression of beef steers with divergent residual feed intake

“…Protein, an essential and expensive nutrient in animal diets, especially for high-performance cattle, is often a limiting factor [1]. Ruminants mainly derive their amino acids (AA) from dietary protein that escapes rumen degradation and from microbial proteins [2].…”