Juan G.R. Influence of altered irrigation regime and irrigation technique on growth, development and yield of covered dark tobacco.
Dissertation. High Agricultural Institute “V. Kolarov”, Plovdiv, Bulgaria (1984)
The investigations carried out in 1979-1982 concerning the irrigation of covered dark tobacco in the conditions of Cuba show that there are significant differences in the total yield and the different groups of tobacco categories: in kg/ha, thousand leaves/ha and thousand pesos/ha for the irrigation water management used. The irrigations varies from 6 to 7 in the treatment of higher economic effect, with irrigation distribution 3-4 during the period from transplanting up to 9/10 leaves: 1-2 from 9-10 leaves to first harvest, 1-2 from first to the last harvest.The evapotranspiration during the 84 day of vegetative cycle is 232 mm.
It is taking as economically most perspective the irrigation by alternate furrows at the end of second and during the third vegetative period with 50 % reduction of water requirement. When using it, the soil level is /88- 82/-80/ 80-76/ % of the field capacity during the first, second and third vegetative period of tobacco with yield of 1904 kg/ha, 553000 leaves /ha and total production value of 4807 pesos/ha. The comparison between perspective irrigation regime and one used until now shows that is reduced the total water requirement by 15 % and the production cost price by an average of 46 pesos/ha and the burning rate of cigar leaves is improved.