Forage management intensification and supplementation strategy: Intake and metabolic parameters on beef cattle production
| Autor: | Tiago Luis da Ross de Araujo, Eliéder Prates Romanzini, Jefferson Fabiano Werner Koscheck, Ricardo Andrade Reis, Adriana Cristina Ferrari, Lutti Maneck Delevatti, Diego M. Renesto, J. T. Mulliniks, Rondineli Pavezzi Barbero |
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| Přispěvatelé: | Universidade Estadual Paulista (Unesp), Trouw Nutrition Brasil, Instituto de Zootecnia, West Central Research and Extension Center |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
0303 health sciences
geography geography.geographical_feature_category 030309 nutrition & dietetics 0402 animal and dairy science Forage 04 agricultural and veterinary sciences Biology Beef cattle 040201 dairy & animal science Pasture 03 medical and health sciences Rumen Animal science Fodder Latin square Tropical pastures Grazing Animal Science and Zoology Animal nutrition Grazing management Nutritional evaluation |
| Zdroj: | Scopus Repositório Institucional da UNESP Universidade Estadual Paulista (UNESP) instacron:UNESP |
| Popis: | Made available in DSpace on 2019-10-06T16:05:54Z (GMT). No. of bitstreams: 0 Previous issue date: 2019-01-01 Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Improving animal performance on pasture requires grazing management that optimizes forage intake in combination with the appropriate supplementation strategy. The objective was to determine the effects of sward canopy height and level of supplementation on forage intake, digestibility, and ruminal fermentation kinetics of Nellore steers in a double Latin square design with repeated measures. Treatments were three sward heights with differing levels of supplementation and included: (1) short height with high supplementation (SH-HS, 15 cm and 0.6% BW); (2) short height with moderate supplementation (SH-MS, 15 cm and 0.3% BW); (3) moderate height with moderate supplementation (MH-MS, 25 cm and 0.3% BW); (4) moderate height with low supplementation (MH-LS, 25 cm and 0.1% BW); (5) tall height with low supplementation (TH-LS, 35 cm and 0.1% BW); and (6) tall height with no supplementation (TH-WS, 35 cm). Intake of crude protein and total digestible nutrients was greater (P < 0.05) with tall swards and moderate supplementation rates. Nutrient digestibility among treatments did not differ (P ≥ 0.21), possibly due to the availability of high-quality forage during the wet season. Likewise, rate of neutral detergent fiber degradability did not differ (P ≥ 0.19) among treatments. Ruminal ammonia nitrogen differed (P = 0.02) among treatments with moderate supplementation having the greatest (SH-MS) and lowest (MH-MS) concentrations (13.6 and 9.7 mg/dL, respectively). Ruminal pH and volatile fatty acid concentrations did not differ (P ≥ 0.18) among treatments. Microbial N flow to the small intestine and efficiency of microbial synthesis exhibited a quadratic response with moderate sward height treatments having greater values. With these treatments and under the conditions of this study, various combinations of sward height and supplementation level did not alter rumen fermentation kinetics. Universidade Estadual Paulista (Unesp) Faculdade de Ciências Agrárias e Veterinárias Câmpus Jaboticabal Departamento de Zootecnia Trouw Nutrition Brasil Universidade Federal Rural do Rio de Janeiro (UFRRJ) Instituto de Zootecnia Departamento de Produção Animal University of Nebraska West Central Research and Extension Center Universidade Estadual Paulista (Unesp) Faculdade de Ciências Agrárias e Veterinárias Câmpus Jaboticabal Departamento de Zootecnia CNPq: 131972/2014-6 CNPq: 131978/2014-4 FAPESP: 2012/14956-6 FAPESP: 2012/20264-0 FAPESP: 2013/05894-0 FAPESP: 2013/09394-1 FAPESP: 2013/25202-5 FAPESP: 2014/21138-3 |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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