Estimates of growth of pineapple cv Vitoria seedlings of different sizes after acclimatization

Sávio da Silva Berilli Almy Junior Cordeiro de Carvalho Silvio de Jesus Freitas Ana Paula Candido Gabriel Berilli Paulo Cesar dos Santos About the authors

The pineapple cv Vitória is a new cultivar, with an important characteristic of being resistant to fusariosis. The use of seedlings of different stages of growth, after the acclimatization, can interfere in the final quality of the seedlings to plant in the field. This work aimed to evaluate the influence of different sizes of micropopagated and acclimatized seedlings of the pineapple cv Vitória on their development after acclimatization. Micropropagated seedlings of the pineapple cv Vitoria of different sizes, acclimatized under green houses were selected, and were planted in open air beds for acclimatization, for a period of 150 days. A randomized complete block design was used, in a factorial scheme 7x5, corresponding to seven initial phenologic phases (developing stages: 0, 30, 60, 90, 120, 150 and 161 days of acclimatization) and to five evaluation times in field conditions, represented by E-1, E-2, E-3, E-4 and E-5 (20, 30, 60, 90 and 150 days of acclimatization). The treatments were evaluated concerning the number of leaves, plant height and rosette diameter over the period of acclimatization. It was observed that the seedlings stages 2, 3, 4 and 5, can be acclimated for a minimum of 120 days without loss of quality for planting and that the growth rate can be adjusted by quadratic and third degree regressions, with high coefficients of determination (R²)

growth; Ananas comosus; cv Vitória; micropropagation

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