Resumo

QUIJADA, Osmar et al. Influence of the pruning and potassium nitrate and potassium tiosulphate application over the handle in Maracaibo, Venezuela. II: Production and efficiency index. Agronomía Trop. [online]. 2009, vol.59, n.3, pp.289-296. ISSN 0002-192X.

The pruning influence and potassium nitrate (KNO3) and potassium tiosulphate (TSK) application was evaluated over the production and efficiency index the handle variety Irwin and Tommy Atkins. The research was carries at Centro Frutícola (CENFRUZU), Zulia State, Venezuela. The treatment corresponds to a factorial design of pruning at 2 levels (with and without pruning) and flowering inductors at 2 levels (KNO₃ at 6% and TSK at 1%) with a control without pruning and not inductors. The experiment was reloaded in 2 productive cycles (2003-2004 and 2004- 2005). A factorial design was used, with 2 treatments of pruning at 2 levels (with and without pruning), 2 flowering inductor levels (KNO-3 6% and TSK 1%), also was used a control, without pruning) and inductor. The treatments were located at random using 2 varieties: Irwin and Tommy Atkins with 4 plants per treatment. For each cycle, 2 essay was realized, named early and late induction. Four essays were made at total. It was evaluated production variables, production and efficiency index KNO₃ treatments combine with pruning increased 8 fruits number and was 6.5 weight fruits for Irwin during early induction; for this variety increased fruits number at 212% and 210% at weight fruits during late induction. KNO₃ without pruning increased 315% fruits number at 315% and 303% in weight fruits in Tommy Atkins during early induction. The results of this research showed that KNO₃ combined with pruning over Irwin reached the best behavior characteristics, and productive indexes, during both inductions over booth varieties compared with others applied treatments

Palavras-chave : Mangifera indica L; handle; production; pruning; potassium nitrate; potassium tiosulphate.