Tiller dynamics of ryegrass managed under two stocking rates
| Autor: | Sheila Cristina Bosco Stivanin, Marta Gomes da Rocha, Luciana Pötter, Viviane da Silva Hampel, Marcos Bernardino Alves, Paulo Roberto Salvador |
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| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: | |
| Zdroj: | Acta Scientiarum: Animal Sciences, Vol 36, Iss 3, Pp 279-283 (2014) |
| Druh dokumentu: | article |
| ISSN: | 1806-2636 1807-8672 |
| DOI: | 10.4025/actascianimsci.v36i3.22912 |
| Popis: | This study investigated the tiller dynamics of Italian ryegrass (Lolium multiflorum Lam) under low and high stocking rates. These rates were determined by heifers exclusively on pasture or grazing and supplemented with oats and corn grain. The experimental design was completely randomized with repeated measurements over time, with two stocking rates, three and six replications of area for low and high stocking rates, respectively. The appearance rate (1.0 tillers tiller-1 m-2), survival rate (0.8 tillers tiller-1 m-2), population stability index (1.6) and site occupation (0.3) were similar for high and low stocking rates. The tiller density was similar for different stocking rates. The first generation of tillers was 56% of the tiller population at end of the ryegrass cycle. The increase by 22.5% in the stocking rate derived from the use of supplements for grazing heifers did not alter the tiller dynamics of ryegrass. |
| Databáze: | Directory of Open Access Journals |
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