Forage accumulation and morphogenesis of Brachiaria ruzizienis under defoliation levels

Authors

  • Newton Costa Embrapa Roraima

DOI:

https://doi.org/10.22256/pubvet.v10n10.736-740

Keywords:

green dry matter, leaves, tillering, senescence

Abstract

The effect of defoliation levels (10, 15, 20, 25 and 30 cm above soil level) on green dry matter (GDM) yield and morphogenetic and structural characteristics of Brachiaria ruziziensis were evaluated under field conditions in Roraim´s savannas. The effects of defoliation levels on the GDM yields, number of leaves plant-1, leaf area index, leaf appearance and elongation rates were quadratics and maximum values recorded with cutting at 22.2; 17.7; 22.5; 17.1 and 25.2 cm above soil level, respectively. The population tiller density was inversely proportional to the level of defoliation, while the opposite occurred for to medium blade length and leaf senescence rate. Apical meristem removing percentage was higher with increasing defoliation level. Aftermath regrowth showed close negative correlation with defoliation level.

Published

2016-09-28

Issue

Section

Pastagem e forragicultura

How to Cite

Forage accumulation and morphogenesis of Brachiaria ruzizienis under defoliation levels. (2016). Pubvet, 10(10). https://doi.org/10.22256/pubvet.v10n10.736-740

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