POTASSIUM THIOSULPHATE, UREA AND POTASSIUM NITRATE APPLICATIONS ON VEGETATIVE AND FLORAL GROWTH IN MANGO ‘HADEN’
A complete randomized experimental was designed using 32 mango plants, using one plant as the experimental unit with 8 replications. In each plant 12 branches/plant were marked. The treatments were : The check (T1); Urea (0,5%) applied during Jul. and Nov. 1997 alternated with potassium nitrate (60 g/L) during Oct. and Nov. (T2); potassium thiosulphate (4%) during Jul. and Nov., alternated with potassium nitrate (60 g/L) during Oct. and Dec. (T3); and potassium nitrate only (60 g/L) during Jul., Oct. and Dec.(T4)
The largest significant effects on vegetative growth were observed at 130 days after treatments using the T2 treatment; that is, when urea was applied with potassium nitrate, plants grow larger than the checks, and at 210 days the largest vegetative growth was observed with the T3 treatment.
At long range (210 days), significant differences in vegetative and flowering growth were observed in the T3 treatment. The flowering tendency was observed at 130 days in the T4 treatment, and at 210 days, with the T3 treatment.