Animal performance, production, and quality of Tanzania grass fertilized with nitrogen
| Autor: | Sandra Galbeiro, Glauber Marcelo Fakir, Carlos Alberto Scapim, Josmar Almeida Junior, Wagner Paris, Ulysses Cecato, Fabiola Cristine de Almeida Rego, Augusto Manoel Rodrigues |
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| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
0301 basic medicine
Teor de proteína bruta Randomized block design chemistry.chemical_element Forage Biology Pasture Bovinos 03 medical and health sciences Ganho de peso Grazing Dry matter lcsh:Agriculture (General) Chemical composition geography geography.geographical_feature_category Digestibilidade da matéria seca 0402 animal and dairy science 04 agricultural and veterinary sciences 040201 dairy & animal science Nitrogen lcsh:S1-972 Neutral Detergent Fiber 030104 developmental biology Agronomy chemistry Taxa de lotação General Agricultural and Biological Sciences |
| Zdroj: | Semina: Ciências Agrárias, Vol 38, Iss 6, Pp 3861-3870 (2017) |
| ISSN: | 1679-0359 |
| Popis: | This study aimed to assess forage production, animal performance, and the chemical composition of Tanzania grass pasture fertilized with 50, 100, 200, and 400 kg ha-1 of nitrogen. The variables analyzed were: leaf mass, daily accumulation rate, leaf/stem ratio, average daily gain, stocking rate, live weight gain per unit of area crude protein, neutral detergent fiber, and in vitro dry matter digestibility of leaves. The pasture management maintained the pasture height at 50 cm by using a continuous grazing method with the adjustment of stocking rate. The experimental design was a randomized block with three replicates. The leaf mass increased linearly in response to nitrogen, with an increase of 1003 kg (34%) observed between a nitrogen content of 50 and 400 kg ha-1. Nitrogen did not affect the average daily gain, but increased the stocking rate and live weight gain ha-1. The value of crude protein and neutral detergent fiber were higher with increased nitrogen levels, whereas the leaf digestibility did not affect nitrogen use. The comparison of 50 and 400 kg ha-1 levels indicated that there was an average increase of 19.2% in the leaf crude protein. The increased application of nitrogen fertilizer in Tanzania grass improved the chemical composition and animal performance; with regard to studied variables, the dose of 200 kg ha-1 resulted in the greatest improvement. |
| Databáze: | OpenAIRE |
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