Abstract:The structure of the mangrove forest of the Benevente River estuary, in Anchieta, ES, was analyzed by the plot method in order to evaluate the distribution of species along the river. The results indicated a trend of species distribution, in which Avicennia schaueriana Leechm ex Stapf & Moldenke and Rhizophora mangle L. exhibited the highest dominance and relative density in areas under greater marine influence, while Laguncularia racemosa (L.) Gaertn.f. and Avicennia germinans (L.) Stearn. showed higher dominance and relative density in areas under greater influence of fresh water. The density ranged from 700 to 7,866 stems.ha -1 , the basal area from 10.3 to 72.2 m 2 .ha -1 , the average height from 2.0 to 16.4 m and average DBH (diameter at breast height) from 4.7 to 27.3 cm. Most forests exhibited distribution of trunks of the inverted iota type, with an absence of selective cutting. The contribution of the basal area was larger in diameter class ≥10 cm, indicating the high structural development of the forests studied. The forests studied exhibited good conservation. , a altura média de 2,0 a 16,4 m e o DAP médio de 4,7 a 27,3 cm. A maioria das florestas analisadas exibiu distribuição de troncos do tipo jota invertido, com ausência de corte seletivo. A contribuição em área basal foi maior na classe diamétrica ≥10 cm, indicando o elevado desenvolvimento estrutural das florestas estudadas. As florestas analisadas exibiram bom estado de conservação.

The objective of this study was to evaluate the effect of silicon and potassium fertilization on the growth and nutrient content of pineapple plantlets 'Vitória' obtained from in vitro cultivation. The experiment was conducted in a greenhouse from November 2013 to April 2014, totaling 150 days. The experimental design was randomized blocks, in a 4 x 2 factorial scheme, with four doses of potassium chloride (0, 1.25, 2.5 and 3.75 g L -1 ) with or without the application of silicic acid, with five replications of 12 plants each. The silicon concentration in pineapple plants ranged from 11.57 to 16.97 g kg -1 , and an increase of 33% in the nutrient levels in plants fertilized with the lowest dose of potassium chloride was observed. It was observed that increasing doses of potassium chloride together with silicic acid resulted in lower root volumes in pineapple plantlets. Potassium accumulation of pineapple plantlets fertilized with silicic acid was lower than that of non-fertilized plantlets.

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(2) RESUMO O trabalho objetivou avaliar diferentes adubações no crescimento inicial de Alcantarea vinicolor e determinar seus teores foliares de N, P e K. Foram testados quatro diferentes tratamentos de adubação T1 (0,31g de sulfato de amônio, 0,19g de fosfato de araxá e 0,156g de cloreto de potássio por vaso); T2 (1g L-1 da formulação Peters® 15-5-15 N-P-K); T3 (T1 e T2 aplicados conjuntamente) e T4 (T1 aplicado conjuntamente a 0,49g L-1 de sulfato de amônio, 0,33g L-1 de nitrato de potássio, 0,2g L-1 de sulfato de magnésio e 0,083g L-1 de MAP), com quatro repetições e dois vasos por parcela, com uma planta cada. As mudas foram cultivadas em fibra de coco por um período experimental de 6 meses e avaliou-se: o número de folhas (NF), diâmetro da roseta (DIAM), intensidade da cor verde (SPAD), massa seca foliar (MSF) e teores foliares de N, P e K. As plantas do T1 apresentaram os menores valores de NF, DIAM, MSF, SPAD e teor de N. As demais características avaliadas não diferiram em função dos tratamentos que poderiam ser utilizados indiferentemente. Economicamente seria mais viável utilizar as adubações correspondentes ao T2 ou T4, dependendo da melhor relação custo-benefício para o produtor. Palavras-chave: Bromélia, adubos, teores de nutrientes, fibra de coco. ABSTRACT Initial growth of Alcantarea vinicolor in function of sources and doses of nutritiousThe research aimed at evaluating different fertilizations on the initial growth of Alcantarea vinicolor and at determining its N, P, and K leaf contents. Four different fertilization treatments were tested T1 (187.5 mg of N, 25 mg de P and 234.4 mg of K per pot); T2 (1g L-1 of the formulae Peters® 15-5-15 N-P-K); T3 (T1 and T2 applied together) e T4 (T1 applied with 0.49g L-1 of ammonium sulfate, 0.33g L-1 of potassium nitrate, 0.2g L-1 of magnesium sulfate and 0.083g L-1 of MAP), with four replications and two pots per plot, with one plant in each. The plants were grown in coconut fiber for an experimental period of six months and the number of leaves (NF), rosette diameter (DIAM), green color intensity (SPAD) and the N, P and K leaf contents were evaluated. The plants under Treatment 1 showed the lowest NF, DIAM, MSF, SPAD and N leaf content values. The other characteristics evaluated did not differ as a function of treatments which might be used indifferently. Economically it might be more feasible to use the fertilizations corresponding to T2 or T4, depending on the best cost-benefit ratio to the producer.

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