Water & Irrigation
Redonet J. L. and Perez C.O. Fertilizer application time in the dark tobacco Criollo variety.
Tobacco Series Vol.6, No. 2: 63 - 75, 1983; Cuba.
A field experiment in order to determine the effect of fertilization time on the growth and tobacco plant characteristics, as well as the yield and quality of cured dark tobacco cultivate in a Ferrallitic Quartzite Yellow lixiviated soil, was studied. The fourtreatments used were: Witness- fertilization 33% before transplantation, 33% in the second week, with the tomb of the furrow and 33% in the third week in the first ridging; Treatment A-50% of fertilizer before transplant and 50% in the third week; Treatment B-50% of fertilizer before transplantation and 50% in the fifth week in the second ridging and Treatment C- phosphorus, potassium and manganese applied at volley before transplantation and Nitrogen fractionated in 50% at the second week and 50% in the third week. The agricultural techniques was used in irrigation conditions.The fertilizer formula was 10-10-15-3 at a rate of 750 kg / ha and carriers: ammonium nitrate, triple super phosphate, potassium sulphate and magnesium carbonate.
Data from the complete plants showed no differential effects on plant high, stalk diameter and leaf area. The total yield and the classes groups of tobacco leaves showed no significant differences on any of the treatments. The value of production was closelylinked to yield. The overall results support the idea on that the application of one part of fertilizer before transplantation and the rest divided into one or two applications from the second week until the fifth week after transplantation produces quality and yields similar to those obtained with current practice and give the possibility to reduce the costs of the application of fertilizer, using whatever treatments A or B.