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- Title
Rendimento de forragem e morfogênese de Axonopus aureus, durante o período seco, nos cerrados de Roraima.
- Authors
De Lucena Costa, Newton; De Moraes, Anibal; Gianluppi, Vicente; Bendahan, Amaury Burlamaqui; Magalhães, João Avelar
- Abstract
The effects of regrowth age (21, 28, 35, 42, 49, 56, 63 and 70 days) on dry matter (DM) yield, and morphogenetic and structural characteristics of Axonopus aureus, submitted to burning, during dry season, were evaluated under natural field conditions. Evaluations were carried out during the period of December 2010 to February 2011. DM yields, absolute growth rate, number of tillers/plant, number of leafs/plant, leaf area, leaf senescence and elongation rates and blade length increased consistently with growth stage. The relations between DM yield and forage production rate with cutting plants age was described by the quadratic regression model. The maximum DM yield and forage production rate performance were estimated at 69.14 and 45.49 days of regrowth. The crop growth and relative growth rates, tiller and leaf appearance rates were inversely proportional to cutting plant age. To maximize the forage use efficiency and to prevent larger losses relative to senescence and leaves death, it is recommended a regrowth interval between 42 to 56 days.
- Subjects
GROWTH rate; LEAVES; AGE of plants; AXONOPUS; ELONGATION factors (Biochemistry); REGENERATION (Biology)
- Publication
Revista Agro@mbiente On-line, 2012, Vol 6, Issue 1, p59
- ISSN
1982-8470
- Publication type
Article
- DOI
10.18227/1982-8470ragro.v6i1.672