"Características estruturais, produtividade e estimativa do consumo de espécies forrageiras hibernais submetidas a diferentes manejos de pastejo e adubação"
| Ano de defesa: | 2017 |
|---|---|
| Autor(a) principal: |
Lipsch, Rafael Ricardo
 |
| Orientador(a): |
Mesquita, Eduardo Eustáquio
|
| Banca de defesa: |
Mesquita, Eduardo Eustáquio
,
Oliveira, Paulo Sérgio Rabello de
,
Costa, Patricia Barcellos
,
Taffarel, Loreno Egídio
|
| Tipo de documento: | Dissertação |
| Tipo de acesso: | Acesso aberto |
| Idioma: | por |
| Instituição de defesa: |
Universidade Estadual do Oeste do Paraná
Marechal Cândido Rondon |
| Programa de Pós-Graduação: |
Programa de Pós-Graduação em Zootecnia
|
| Departamento: |
Centro de Ciências Agrárias
|
| País: |
Brasil
|
| Palavras-chave em Português: | |
| Área do conhecimento CNPq: | |
| Link de acesso: | http://tede.unioeste.br/handle/tede/3173 |
Resumo: | The experiment was conducted at the Experimental Farm of Unioeste, in MarechalCândidoRondonCampus, from April to August 2015. The objective was to evaluate productivity, estimated consumption plus trampling losses and structural characteristics of winter forages, submitted to different grazing and doses of nitrogen. The experimental design was a randomized complete block design with three replications. Ten Dutch cows were used, with an average body weight of 550 kg. In the A bands(13 x 20 m), four annual winter crops and one consortium: triticale (IPR 111), black oats (IAPAR 61 ibiporã), black oats (Embrapa 139 haze), white oats (emerald IPR) and white oat consortium with triticale. In the B bands (4 x 39 m), transversal to the bands A, grazing and nitrogen management were allocated. The structural and productive characteristics evaluated were forage canopy, number of tillers, total dry matter yield (D.M), leaf/stem ratio, and stem diameter and length at 58, 93 and 141 days after sowing. The estimate of dry matter intake plus trampling losses was performed at 58 and 93 after sowing. At 58 days, nitrogen management did not show any effects on structural variables and productivity. For the evaluation of the species, the emerald oats and the consortium obtained higher plants, larger stem diameters, longer stem lengths and yields of 2.604 and 2.316 kg ha-1 respectively. At 93 days after sowing, the management of 60 kg ha-1 of nitrogen without grazing had higher canopy heights presented longer stalk lengths and productivity in relation to other managements. The triticale was the only species that did not present significant differences for grazing and nitrogen management and D.M. The triticale showed lower canopy height, thinner and smaller stalks. At 141 days, only triticale with increase in grazing intensity showed a decrease in forage canopy height and thicker stems. The IAPAR 61 oats had thinner stalks. The increase in grazing intensification promoted a reduction in stem lengths, but was significant only for the consortium and emerald oats. In the absence of grazing, the emerald oats had larger stalks than the triticale. When submitted to a grazing the IAPAR 61 oats had the shortest stem length and the consortium, and the emerald oats had the highest values. The grazing influenced D.Mand the difference was approximately 900 kg between grazing and two grazing management and approximately 1,250 kg between grazing and two grazing. The highest estimate of the consumption plus losses due to trampling of dry matter was verified in the emerald oats, and the lowest was of the IAPAR 61 oats. |