SILVA, A. F.; http://lattes.cnpq.br/5057352971920034; SILVA, Albertine Felipe da.
Resumen:
The banana crop is of great socioeconomic importance both for Brazil and worldwide, but its
production may be limited by low water availability. Therefore, irrigation management
strategies combined with potassium fertilization are promising alternatives for agricultural
production in these regions. In this sense, the objective was to evaluate the morphology of
banana cv. Nanica under irrigation management strategies and potassium fertilization in the
phenological stages of the plants. The research was carried out under field conditions, located
in São Domingos/PB, using a randomized block design in a 3 × 2 factorial scheme, whose
treatments resulted from the combination of three irrigation management strategies: with
water deficit in the phenological phases irrigation with 50% (water deficit) in the juvenile
phase - JU and fruiting phase - FR and SE - without stress, 100% of the plant's water
requirement throughout the crop cycle, and two doses of potassium applied via soil - DK ( 50
and 100% of K2O), with 4 replications The dose corresponding to 50% of K2O favors the
synthesis of chlorophyll a and an increase in the levels of chlorophyll b in banana cv. Nanica
under water deficit in the juvenile and fruiting phases at 180 days after planting. The dose
corresponding to 50% of K2O promotes an increase in initial fluorescence (F0) and variable
fluorescence (Fv) when they receive water stress in the juvenile stages of banana cv. Nanica
at 180 days after planting. The dose corresponding to 50% of K2O reduces the maximum
fluorescence (Fm) in the juvenile stages under water deficit of banana cv. Nanica at 180 days
after planting. Water stress caused in the juvenile phase promotes greater negative effects on
growth, water content, damage to the cell membrane of banana cv. Runt. The dose
corresponding to 50% of the K2O recommendation reduces the growth of banana plants cv.
Nanica at 210 days after planting.