Theme 01: Ecophysiology of Grasslands
Description
This trial was conducted to evaluate growth dynamics and defoliation frequency of Italian ryegrass (Lolium multiflorum) and Paspalum urvillei in a lowland area under three levels of P and K. Using randomization tests we observed that, in a general way, fertilizer treatments were not the determinant factors of leaf appearance and elongation rates for both species. Only the leaf appearance rate of Paspalum urvillei at 100 % of recommendation level and the elongation rate for Italian ryegrass, in the same treatment, was different. Probably other factors, like drainage, are contributing to these results. I. ryegrass phyllochron ranged from 57.3 to 72.6 degree-days. Paspalum urvillei presented higher grazing frequency in almost all evaluated periods, revealing a high preference by the grazing animals.
Citation
de Quadros, Fernando L. F.; Pigatto, A. G. S.; Bandinelli, D. G.; Marchezan, E.; and da Rocha, Marta G., "Morphogenesis and Defoliation Frequency of Italian Ryegrass (Lolium multiflorum) and Paspalum urvillei in Lowland under Three Levels of P and K" (2021). IGC Proceedings (1993-2023). 23.
https://uknowledge.uky.edu/igc/19/1/23
Included in
Morphogenesis and Defoliation Frequency of Italian Ryegrass (Lolium multiflorum) and Paspalum urvillei in Lowland under Three Levels of P and K
This trial was conducted to evaluate growth dynamics and defoliation frequency of Italian ryegrass (Lolium multiflorum) and Paspalum urvillei in a lowland area under three levels of P and K. Using randomization tests we observed that, in a general way, fertilizer treatments were not the determinant factors of leaf appearance and elongation rates for both species. Only the leaf appearance rate of Paspalum urvillei at 100 % of recommendation level and the elongation rate for Italian ryegrass, in the same treatment, was different. Probably other factors, like drainage, are contributing to these results. I. ryegrass phyllochron ranged from 57.3 to 72.6 degree-days. Paspalum urvillei presented higher grazing frequency in almost all evaluated periods, revealing a high preference by the grazing animals.
