EFFECT OF PLANT SPACING AND GROWTH REGULATORS ON GROWTH AND FLOWER YIELD OF GLADIOLUS GROWN UNDER POLYTHENE TUNNEL
Experiments were conducted for five years (1982 – 1987) under polythene tunnel with gladiolus cv. 'Psittacinus hybrid'. The corms (2.5–2.7 cm in diameter) were soaked (for 6 hours) in GA3 (50 and 100 ppm), Ethrel (100 and 200 ppm) and Kinetin (25 and 50 ppm) before planting at 25 and 33 corms/m2 densities. Results show that higher plant density (33 corms/m2) increases the plant height, length of flower stalk and corm yield/unit area, while it decreases the number of florets/ spike, length and diameter of flower, irrespective of the treatments including control. Treatment with Ethrel inhibited plant growth but markedly increased the corm yield and the maximum corm yield of 132.5/plot (25 corms/m2) and 138.6/plot (33 corms/m2) were noted by soaking of corms with Ethrel at 100 and 200 ppm respectively, compared to 60.0 and 79.2 corms/plot in control. Soaking of corms with Kinetin however, showed an increase in the number of florets/spike and size of flowers.
Roychowdhury, N. (1989). EFFECT OF PLANT SPACING AND GROWTH REGULATORS ON GROWTH AND FLOWER YIELD OF GLADIOLUS GROWN UNDER POLYTHENE TUNNEL. Acta Hortic. 246, 259-264