SciELO - Scientific Electronic Library Online

vol.6 issue2Maintenance of infectivity of Tymovirus in plant extracts author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand




Related links


Acta Botanica Brasilica

Print version ISSN 0102-3306


MEIRELLES, Maria Lúcia  and  HENRIQUES, Raimundo Paulo. Net primary production in burnt and unburnt area of campo sujo de cerrado (Planaltina - DF). Acta Bot. Bras. [online]. 1992, vol.6, n.2, pp.3-14. ISSN 0102-3306.

The above-ground net primary production was estimated for two areas of campo sujo of cerrado, one unburnt and the other initially burnt. Production was estimated by using diferences in the above-ground biomass which was sampled at quarterly intervals. The study was planned to coincide with the wet season, between october 1980 and april 1981. The above-ground net primary production of the herbaceous layer in the burnt area (176 ± 33 g m-2) was higher than in the unburnt area (108 ± 26 g m-2). The efficiency of the conversion of solar energy into dry matter was 0,12 ± 0,0,03% for the unburnt campo sujo and 0,19 ± 0,04% for the burnt campo sujo. The quartely production figures had significative correlation with precipitation and soil water, showing that the water is a limiting factor to the herbaceous layer primary production in campo sujo of cerrado.

Keywords : primary production; fire; savanna.

        · abstract in Portuguese     · text in Portuguese     · Portuguese ( pdf )


Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License