Silva, CEMD, Gonçalves, JFDC, Feldpausch, TR, Luizão, FJ, Morais, RRD and Ribeiro, GO (2006) Eficiência no uso dos nutrientes por espécies pioneiras crescidas em pastagens degradadas na Amazônia central (Nutrient use efficiency of pioneer species grown on abandoned pastures in central Amazonia). Acta Amazonica, 36 (4). 503 - 512 . ISSN 0044-5967
Available under licence : See the attached licence file.
Large areas of Amazonian forest have been converted to pastures over the last two decades. Low soil fertility and mismanagement results in a rapid decline in net primary productivity leading the pastures to be abandoned, and woody vegetation adapted to low nutrient conditions colonize the areas. The objective of this study was to examine nutrient use efficiency, following liming (calcium) and phosphorus addition by three of the most frequent colonizing species. The experiment conducted on a six year-old secondary forest, consisted of four treatments: control; phosphorus addition (P); phosphorus and lime addition (P+Cal); and phosphorus, lime and gypsum addition (P+Cal+G). Leaf gas exchange, soil and leaf nutrient concentration were determined eight months after the treatment application. There was a significant response by species to the addition of phosphorus and lime (P+Cal and P+Cal+G). The species, Bellucia grossularioides accumulated more N, P and Zn in the leaves, while Laetia procera accumulated more Ca and Mn. The species Vismia japurensis had higher nutrient use efficiency, as a function of the higher photosynthetic rates. Vismia japurensis presented lower P concentrations than Bellucia grossularioides, suggesting that is well adapted to environments low in nutrients, as this species often occurs in degraded areas in Amazonia.
|Copyright, Publisher and Additional Information:||© 2006 Silva et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.|
|Institution:||The University of Leeds|
|Academic Units:||The University of Leeds > Faculty of Environment (Leeds) > School of Geography (Leeds)|
|Depositing User:||Symplectic Publications|
|Date Deposited:||13 Jan 2012 08:53|
|Last Modified:||10 Jun 2014 08:29|
|Publisher:||The Instituto Nacional de Pesquisas da Amazônia|