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231224s2017 xx |||||o 00| ||eng c |
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|a 10.5713/ajas.16.0629
|2 doi
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|a pubmed24n0886.xml
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|a (DE-627)NLM265888964
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|a (NLM)27809463
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|a DE-627
|b ger
|c DE-627
|e rakwb
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| 041 |
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|a eng
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| 100 |
1 |
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|a de Oliveira Franco, Marcia
|e verfasserin
|4 aut
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|a Intake, digestibility, and rumen and metabolic characteristics of cattle fed low-quality tropical forage and supplemented with nitrogen and different levels of starch
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|c 2017
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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| 338 |
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|a ƒa Online-Ressource
|b cr
|2 rdacarrier
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|a Date Revised 01.10.2020
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a OBJECTIVE: Effects of nitrogen supplementation associated with different levels of starch on voluntary intake, digestibility, and rumen and metabolic characteristics of cattle fed low-quality tropical forage (Brachiaria decumbens hay, 7.4% crude protein, CP) were evaluated using ruminal and abomasal cannulated steers
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|a METHODS: Five European×Zebu young bulls (186 kg body weight, BW) were distributed according to a 5×5 Latin square. The following treatments were evaluated: control, supplementation with 300 g CP/d (0:1), supplementation with 300 g starch/d and 300 g CP/d (1:1), supplementation with 600 g starch/d and 300 g CP/d (2:1), and supplementation with 900 g starch/d and 300 g CP/d (3:1). A mixture of nitrogenous compounds provided 1/3 from true protein (casein) and 2/3 from non-protein nitrogen (mixture of urea and ammonium sulphate, 9:1) was used as the nitrogen supplement. In order to supply energy a unique source of corn starch was used
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|a RESULTS: Supplements increased (p<0.05) dry matter intake, but did not affect (p>0.05) forage intake. There was a cubic effect (p<0.05) of starch on voluntary intake. This was attributed to the highest forage intake (g/kg BW) when using the 2:1 starch:CP ratio. Supplements increased (p<0.05) organic matter (OM) digestibility, but did not affect (p>0.05) neutral detergent fibre corrected for ash and protein (NDFap) digestibility. There was a positive linear effect (p<0.05) of the amount of starch supplemented on OM digestibility. Total NDFap digestibility was not affected (p>0.05) by the amount of supplemental starch. Ruminal ammonia nitrogen concentrations were higher (p<0.05) in supplemented animals, however, a negative linear effect (p<0.05) of amount of starch was observed. Supplements increased (p<0.05) the nitrogen balance (NB) and efficiency of nitrogen utilization. These effects were attributed to increased body anabolism, supported by higher (p<0.05) serum concentration of insulin-like growth factor 1. Increasing the amount of starch tended (p<0.06) to linearly increase the NB. In spite of this, there was a highest NB value for the 2:1 starch:CP ratio amongst the treatments with supplementation
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|a CONCLUSION: Nitrogen supplementation in cattle fed low-quality tropical forage increases nitrogen retention in the animal's body. An additional supply of starch increases nitrogen retention by increasing energy availability for both rumen and animal metabolism
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|a Journal Article
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|a Brachiaria decumbens
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| 650 |
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|a Digestibility
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| 650 |
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|a Fibre
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| 650 |
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|a Nitrogen Balance
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| 650 |
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4 |
|a Zebu
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| 700 |
1 |
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|a Detmann, Edenio
|e verfasserin
|4 aut
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| 700 |
1 |
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|a de Campos Valadares Filho, Sebastião
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Batista, Erick Darlisson
|e verfasserin
|4 aut
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| 700 |
1 |
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|a de Almeida Rufino, Luana Marta
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Barbosa, Marcília Medrado
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Lopes, Alexandre Ribeiro
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Asian-Australasian journal of animal sciences
|d 1998
|g 30(2017), 6 vom: 03. Juni, Seite 797-803
|w (DE-627)NLM098195883
|x 1011-2367
|7 nnns
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| 773 |
1 |
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|g volume:30
|g year:2017
|g number:6
|g day:03
|g month:06
|g pages:797-803
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| 856 |
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|u http://dx.doi.org/10.5713/ajas.16.0629
|3 Volltext
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