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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Relação planta-animal em pastagem de azevém (lolium multiflorum lam.) e milheto (pennisetum americanum (l.) leeke) com ovinos sob níveis de suplemento / Plant-animal relation on italian ryegrass (lolium multiflorum lam.) and pearl millet (pennisetum americanum (l.) leeke) pasture with sheep under supplement levels

Bremm, Carolina 28 February 2007 (has links)
This experiment was conducted aiming to elucidate aspects of the plant:animal interface through the ingestive behavior of sheep receiving different supplement levels (0; 0,5; 1,0 and 1,5% of live weight), kept on an Italian ryegrass (Lolium multiflorum Lam.) pasture during the winter period and Pearl millet (Pennisetum americanum (L.) Leeke) pasture on summer, under continuous variable stocking. The supplement utilized was a commercial ration. It was evaluated lactating ewes and ewe lambs when with their mothers and after weaning on Italian ryegrass pasture. On Pearl millet, the same ewe lambs were evaluated by experimental unit. The experimental design was completely randomized with repeated measures in time with four supplement levels and two area replicates. Supplement levels, with the structural characteristics of cold season pasture, influenced the ingestive behavior of ewes and ewe lambs (P<0.05). Supplement levels have not influenced (P>0.05) the bite size, being influenced by structure of cold season pasture and crude protein content of forage apparently consumed. On summer period, supplement levels and utilization periods of pasture altered the diurnal grazing, rumination and idling times (P<0.05). / O presente trabalho foi realizado com o objetivo de procurar elucidar aspectos pertinentes à interface planta:animal através do comportamento ingestivo de ovinos recebendo diferentes níveis de suplemento (0; 0,5; 1,0 e 1,5% do peso vivo), mantidos em pastagem de azevém (Lolium multiflorum Lam.) no período de inverno e milheto (Pennisetum americanum (L.) Leeke) no verão, sob pastejo contínuo. O suplemento utilizado foi uma ração comercial. Foram avaliadas ovelhas em lactação e cordeiras quando ao pé da mãe e após a desmama na pastagem de azevém. No milheto, foram avaliadas as mesmas cordeiras por unidade experimental. O delineamento experimental foi inteiramente casualizado, com medidas repetidas no tempo, com quatro tratamentos e duas repetições de área. Níveis de suplemento, juntamente com as características estruturais da pastagem de inverno, influenciaram o comportamento ingestivo das ovelhas e cordeiras (P<0,05). Níveis de suplemento não influenciaram (P>0,05) a massa de bocado, sendo influenciado pela estrutura da pastagem de inverno e percentagem de proteína bruta da forragem aparentemente consumida. No período de verão, níveis de suplemento e períodos de utilização da pastagem alteraram os tempos diurnos de pastejo, ruminação e ócio (P<0,05).

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