2014
DOI: 10.5433/1679-0359.2014v35n4suplp2829
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Nutritional aspects applied to grazing cattle in the tropics: a review based on Brazilian results

Abstract: This review presents and discusses the nutritional and physiological aspects of cattle production under grazing in the tropics. The critical evaluations were based on Brazilian experimental results as well as on basic literature concerning ruminant nutrition. Several associations between the characteristics of the grazed forage, the composition of the supplements and animal and microbial requirements were established. The adopted approach was divided according to two different climatic seasons observed in the … Show more

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Cited by 66 publications
(87 citation statements)
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References 54 publications
(84 reference statements)
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“…The absence of an effect on digestible neutral detergent fiber (DNDF) intake indicates that no change was caused by supplementation or by CP levels on forage intake and digestibility. According to Detmann et al (2014a), positive responses on fiber degradation have been observed with increased dietary CP levels for concentrations close to 100 g kg -1 DM, and, in addition, the voluntary intake of forage has been stimulated with the establishment of concentrations close to 145 g kg -1 DM (DETMANN et al, 2014b). In this study, there was a notable difference in protein intake between supplemented and control cows (Table 4).…”
Section: Discussionmentioning
confidence: 71%
“…The absence of an effect on digestible neutral detergent fiber (DNDF) intake indicates that no change was caused by supplementation or by CP levels on forage intake and digestibility. According to Detmann et al (2014a), positive responses on fiber degradation have been observed with increased dietary CP levels for concentrations close to 100 g kg -1 DM, and, in addition, the voluntary intake of forage has been stimulated with the establishment of concentrations close to 145 g kg -1 DM (DETMANN et al, 2014b). In this study, there was a notable difference in protein intake between supplemented and control cows (Table 4).…”
Section: Discussionmentioning
confidence: 71%
“…The similar productive performance among male lambs is related to the linear decrease in the average consumption of ADF, which allowed adequate fermentation to potentially digest the ADF with the addition of PAM in the ration, favoring increased supply of nitrogen release for microbial protein synthesis ( VAN SOEST, 1994;DETMANN et al, 2014). Further, supplementation with grains increases productivity levels when good quality roughage is provided in the diet (SOARES et al, 2013).…”
Section: Resultsmentioning
confidence: 99%
“…Isso pode ter ocorrido devido ao alto teor de FDNi (33,3%), presente na forragem (Tabela 2). Por outro lado, segundo Detmann et al (2014), a ocorrência de um efeito positivo da suplementação proteica é devido à atenuação da carência geral de nitrogênio no rúmen. Este tipo de deficiência restringe a disponibilidade de precursores de nitrogênio para a síntese de enzimas fibrolíticos.…”
Section: Resultsunclassified