Detalhes bibliográficos
| Ano de defesa: |
2013 |
| Autor(a) principal: |
Silva, Nelson Rafael da
 |
| Orientador(a): |
França, Aldi Fernandes de Souza
|
| Banca de defesa: |
França, Aldi Fernandes de Souza,
Reis, Ricardo Andrade,
Godoy, Marcelo Marcondes de,
Ferreira, Reginaldo Nassar,
Orsine, Geisa Fleury |
| Tipo de documento: |
Tese
|
| Tipo de acesso: |
Acesso aberto |
| Idioma: |
por |
| Instituição de defesa: |
Universidade Federal de Goiás
|
| Programa de Pós-Graduação: |
Programa de Pós-graduação em Ciência Animal (EVZ)
|
| Departamento: |
Escola de Veterinária e Zootecnia - EVZ (RG)
|
| País: |
Brasil
|
| Palavras-chave em Português: |
|
| Área do conhecimento CNPq: |
|
| Link de acesso: |
http://repositorio.bc.ufg.br/tede/handle/tede/3109
|
Resumo: |
This study aimed to evaluate the production of green mass (MV), dry matter (DM), nitrogen contained in the plant (NC), conversion efficiency of nitrogen (ECAN), apparent recovery of nitrogen (RAN) and chemical characteristics of pearl millet [Pennisetum glaucum (L.) R. Br]: ADR-500, ADR 7020 and LABH 70732, in doses of N: (0, 50, 100 and 200 kg ha-1), cut at 87 days of vegetative growth, aiming to the silage production. The experimental design used randomized blocks in a 3x4 factorial design (three cultivars and four doses of N), with four replications. Regarding biomass, only the green mass production (MV) showed interactions between N and millet cultivars, ranging from 30.54 to 50.96 t ha-1 of MV. The dry mass production (P>0.05) showed interaction only amongst the N dose, ranging from 7.66 to 12.46 t ha-1. The conversion efficiency of N (ECAN) and apparent recovery of N (NRE) differed (P<0,05) among the doses and the millet cultivars, with decreasing average values due to the increase of nitrogen fertilization. The best conversion efficiency was 54.06 kg DM / kg of N applied, while the highest N recovery rate was 86.54%, both at equivalent dose of the application of 50 kg.ha-1 of N. Among the millet cultivars, significant statistical differences have been observed on the nitrogen contained in the plant in unfertilized plots, ranging from 103.64 kg ha-1 (ADR 500) to 135.69 kg ha-1 (LABH 70732). In fertilized plots cultivars (P>0.05) in NC levels. The ECAN and NRE (P<0.05) among the millet cultivars with average values of 43.34 kg DM / kg of N applied (ADR 500) and 78.76% of N recovered, also with the same cultivar. The variable components of the chemical composition did not differ due to the evaluated N doses, with the average values of: DM - 25.40%; CP - 9.54%; NDF - 62.5%; ADF - 34.13%; HEM - 28.35%; CEL - 29.29%; LIG - 6.68%;NFC - 17.32%, OM - MM and 90.75% - 9.22%. |
