CAPACIDADE DE ABSORÇÃO E EFICIÊNCIA NUTRICIONAL DE ALGUMAS ESPÉCIES ARBÓREAS TROPICAIS
DOI:
https://doi.org/10.24278/2178-5031.199242811Keywords:
Nutrient, uptaking, nutritional efficiency, pioneer species, secondary species, climax speciesAbstract
This work had as objectives to study uptake power characteristcs and nutritional efficiency of species of different successional stages. The research was carried out in a nursery and in a reforested are a by the São Paulo Energetic Company along reservoir edges of "Porto Primavera" Hidroelectric Mill. Nine seedlings and two seventeen month old trees, of nine tropical forest species were used. The washed roots of the seedlings and above ground parts were dried, weighted and chemically analysed. Two trees were cut then had their leaves, branches and stems separated. Samples of these componentswere taken in orderto evaluate their chemical composition. The N, P, K and Ca uptake were larger for pioneer species, followed by other species. The uptake rate of these nutrients for ali species were considered much higher in conditions than in nursery conditions. Pioneer species were the most efficient in the nutrient utilization.
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References
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