Variação no tamanho de frutos e peso das sementes entre e dentro de matrizes de Casuarina equisetifolia L. colhido no quebra-vento do jardim Botânico da UEM

Abstract

This work aims to analyze the variation in fruit size and seed weight that can occur between and within matrices of Casuarina equisetifolia at the age of 33, harvested in the windbreak of the Eduardo Mondlane University botanical garden. For the study, 28 matrices were selected phenotypically, from which the diameter at breast height, height of the trees were measured, the volume of the cylinder was calculated, the shape of the trunk was estimated, the branching of the branches and the health status for each headquarters. The fruits were harvested directly from standing trees. In each matrix, 150 fruits were harvested, from which a sample of 10 randomly selected fruits was taken to determine the height, diameter, weight of the fruits, average number of seeds per fruit and the weight of the seeds. The population had a diameter at the height of the average breast of 31.50 cm, an average height of trees of 14.93 m and an average cylinder volume of 0.89 m3. With the numerical weights assigned, the trees have, on average, a slightly straight trunk with a compact but asymmetrical crown, fruits present and, on average, had an attack up to the first third of the trunk. The height, diameter and weight of the fruits between the matrices was 1.55cm, 1.41cm and 1.77g. Each Casuarina equisetifolia fruit produces an average of 34 seeds with an average weight of 0.059g per seed and 97.67% pure seed. The analysis of variance at 1% of significance showed significant differences between the matrices in all reproductive characteristics, for the height of the fruit (F = 21.2209), fruit diameter (4.2028) and fruit weight (6.0674). All selected matrices showed evidence that there is variation between and within matrices, with the weight of the fruit being the parameter with the greatest variation. With the estimated correlations, there is a tendency for trees with greater volume to also have larger fruits. (TRADUÇÃO NOSSA)