Planta Daninha (2008) 26, 481-486

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P.R.F. Nascimento, S.M.B. Pereira and E.V.S.B. Sampaio (2008)
Biomassa de Egeria densa nos reservatórios da hidroelétrica de Paulo Afonso-Bahia
[Egeria densa biomass in the Paulo Afonso-Bahia hydroelectric plant]
Planta Daninha 26 (3), 481-486
Abstract: In order to estimate biomass production of Egeria densa, the growth of 50 different plant shoots was monitored at three reservoirs, both located in Paulo Afonso-Bahia. The shoots were marked and had their length measured. Fifteen days later they were measured again, collected, dried at 70ºC and weighed. The following highest shoot elongation during the 15 days occurred in May 1999 in Taquari and Moxotó and May 1998 in Quebra: 9.14 ± 3.6, 4.2 ± 2.1 and 11.3 ± 5.3 cm/shoot, respectively, corresponding to the following highest biomass accumulations, 0.26 ± 0.17, 0.10 ± 0.05 and 0.41 ± 0.06 g of dry mass per shoot, respectively. Therefore, E. densa has a very high capacity of biomass accumulation, mainly during the rainy period when nutrient availability is at the highest.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
(original language: Portuguese)
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Research topic(s) for pests/diseases/weeds:
population dynamics/ epidemiology
general biology - morphology - evolution

Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.

Egeria densa (weed) Brazil (NE)