Photoperiodic Response of Growth of Pinus caribaea Seedlings II. Effect on Fresh and Dry Matter, Mineral Uptake and Holocellulose Production

Pot culture experiment was conducted with the seedlings of Pinus caribaea to evaluate the influence of different photoperiodic treatments on fresh and dry weights and holocellulose production and mineral uptake. Long day and interrupted day treatments have produced significantly better fresh and dry weights than normal day and short day treatments. Highest fresh and dry weights of shoot were produced in interrupted day treatment and of ischolar_main in long day treatment. Holocellulose production has shown direct linear relation to shoot dry weight. Plant analysis results have indicated that different photoperiodic treatments also influence mineral uptake, particularly of nitrogen, phosphorus and potassium.