Abstract

QUIJADA R, Osmar et al. Floración influence pruning and potassium nitrate and potassium tiosulphate application over the handle in Maracaibo, Venezuela. I. Flowering. Agronomía Trop. [online]. 2009, vol.59, n.3, pp.275-287. ISSN 0002-192X.

The plain terrain of Maracaibo has an acceptable agroecological condition to the handle production. Pruning influence was evaluated and the application over the flowering of potassium nitrate (KNO3) and potassium tiosulphate (TSK) in cultivars Irwin and Tommy Atkins. The research was made at Centro Frutícola (CENFRUZU) at Mara Municipality, Zulia State, Venezuela, treatments of pruning at two levels (without pruning and with pruning), and 2 flowering inductors levels (KNO₃ 6% and TSK 1%), also was used a control, without pruning and without inductor, was realizated at random using 2 Irwin and Tommy Atkins with 4 plants per treatment, was reloaded in 2 productive cicles for every cicle 2 different test were carried out differenced by date of treatments aplication and named early induction and late induction. Four test was realized over diferent lots. Was evaluated floral variables, and the floral seasons. The flowering of Irwin and Tommy Atkins was after high rainfall period and temperature over 23 ºC. In early induction KNO₃ combined with pruning accelerate the flowering period in one month for Irwin, and three weeks for Tommy Atkins. This treatment also diminished considerably the flowering period duration. TSK accelerate in three weeks the flowering of the studied varieties. The results of this research showed that the KNO₃ combined with pruning over the Irwin reached, accelerate the flowering at the early induction and concentrate the periods of flowering and maximum flowering in this region

Keywords : Handle; Mangifera indica; flowering; pruning; promotors.