Journal of Food, Agriculture and Environment
Nutritional analysis of six forest species grown in two different edaphological conditions in a Mediterranean environment: I. Nitrogen metabolism
Author(s):
Begoña Blasco 1,
María M. Rubio-Wilhelmi 1, Eva Sánchez-Rodríguez 1, Manuel Chirosa 1, Juan M. Ruiz 1, Jose L. Rosua2, Luis Romero1*Recieved Date: 2010-01-13, Accepted Date: 2010-04-03
Abstract:The plants grew with a differentiated pH between 8.0 in the zone called Sierra Elvira and 6.0 in Llano de la Perdiz. This determined the organic-N content, which was far higher in the first zone than in the second. This same difference was found with all the species studied (Quercus ilex, Juniperus oxycedrus, Retama sphaerocarpa, Cistus albidus, Phlomis lychnitis, Daphne gnidium). This phenomenon was repeated in each of the nitrogen forms studied (NO3–, NH4+, total N, mineral N, assimilated N). Therefore, the ratio organic N:assimilated N registered an intermediate value for Llano de la Perdiz and 1.07 for Sierra Elvira, indicating that the plants had had low N reserves and thus could have suffered a lack or limitation at a certain time, and the assimilation rate was not interrupted at any time because of nutritional distortion. The NR activity in its different forms, infiltrated with NO3– or Mo and Mo+NO3– and endogenous, sharply increased, regardless of the plants or pedological conditions. This surge in activity, between 100% and 150%, indicates that the plants underwent a serious limitation in growth (biomass increase), which could have been avoided by N and Mo fertilization.
Keywords:Forest species,
Mediterranean environment, nitrogen metabolismJournal: Journal of Food, Agriculture and Environment
Year: 2010
Volume: 8
Issue: 2
Category: Environment
Pages: 1034-1039
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