On-line version ISSN 1678-4596
TRINDADE, José Pedro Pereira and ROCHA, Marta Gomes da. Budding of "caninha" grass (Andropogon lateralis Nees) under burning effect. Cienc. Rural [online]. 2001, vol.31, n.6, pp. 1057-1061. ISSN 1678-4596. http://dx.doi.org/10.1590/S0103-84782001000600023.
The present task was carried out with the objective of determining the effect of available dry matter of a natural grassland during burning in the post Andropogon lateralis Nees leaf growth rate. The work was executed during the years of 1995 and 1996 in an area belonging to the Department of Animal Science of the Universidade Federal de Santa Maria. The experimental design was randomized blocks with 40 plants per treatments. Burning was applied in August of 1995. In May of 1996 levels of dry matter were simulated in the experimental area. The grasslands treatments were controlled without burning (2.860kg of dry matter (DM)/ha) and burned was with dry matter of 2.580, 5.000, 5.690 and 6.480kg DM/ha. The evaluation of the leaf growth was done in 600 tillers of A. lateralis, with 40 marked plants by treatment and the metodology used to determine the leaf growth was the Haun index. There was burn effect on the increase form of A. lateralis elongation rate (ER) when the available dry matter was 6.480kg MS/ha. The others treatments provided ER similar to the non-burned areas. A. lateralis demonstrated to be a adapted specie to the handling with fire, with fast growth after burning. The decimal scale of Haun demonstrated to be an useful methodology in the study of the budding of plants.
Keywords : labelled tiller; budding; appearance rate; elongation rate; phyllochron.