2014
DOI: 10.1590/1678-6701
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Performance of lactating crossbred cows on pasture supplemented with conventional urea or slow release urea

Abstract: The effect of using conventional urea (CU) or slow release urea (SRU) was evaluated by replacing soybean meal (SBM) in concentrated supplements in levels of 2, 4 or 6% (dry matter basis) on productive performance of crossbred Holstein x Zebu lactating dairy cows (499±61kg body weight and 167 days of lactation) grazing on elephant grass (11.5% CP and 60% NDF) under rotational grazing during the rainy season. A supplement control (no urea) was used containing SBM as a protein source. A total of 21 cows were dist… Show more

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Cited by 2 publications
(2 citation statements)
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References 14 publications
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“…This could be as a result of better synchrony in utilisation of ammonia released from SRNPN sources along with energy sources added in the feed, as better as any conventional protein sources. Abreu et al (2014) also observed no difference in milk yield of crossbred cows when SBM was replaced with polymer coated urea up to 6%. Likewise, Santiago et al (2015) observed no effect on milk yield in crossbred cow when SBM in the control diet was replaced with polymer coated urea at graded levels (0, 34, 66 and 100%).…”
Section: Milk Productionmentioning
confidence: 77%
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“…This could be as a result of better synchrony in utilisation of ammonia released from SRNPN sources along with energy sources added in the feed, as better as any conventional protein sources. Abreu et al (2014) also observed no difference in milk yield of crossbred cows when SBM was replaced with polymer coated urea up to 6%. Likewise, Santiago et al (2015) observed no effect on milk yield in crossbred cow when SBM in the control diet was replaced with polymer coated urea at graded levels (0, 34, 66 and 100%).…”
Section: Milk Productionmentioning
confidence: 77%
“…The cost of feeding per kg 4% fat corrected milk was though non-significant among the three dietary groups, it was lowered by 11.38 and 4.54% when fed CFCU and HMCCU diets, respectively compared to control. Abreu et al (2014) also reported lower cost of production per kg milk production in cows with supplementation of polymer coated SRU was replacing SBM up to 6% of control diet. While, Raouf et al (2017) observed that replacement of SBM with Optigen did not affect the cost of feeding of Holstein cows.…”
Section: Cost Economicsmentioning
confidence: 91%