EFFECT OF ORGANIC AND INORGANIC GROWTH REGULATORS ON GERMINATION AND VIGOUR OF DIFFERENT PULSE SEEDS

Abstract

Four separate pot experiments were carried out on four pulse crops in Rabi season during 2010 to 2011. The experiments were conducted to evaluate the effect of GA lemon juice and tamarind leaf extract on germination and vigour of pulse seed (lentil, chickpea, grasspea and cowpea).The experiments were done with cultivar, BARI Masur- 4, BARI Chola-6, BARI Khesari-2 and BARI Felon-1 with three growth regulators: gibberellin, lemon juice and tamarind leaf extract. During Rabi season 2010 to 2011, three concentrations of gibberellins (10, 20 and 30 ppm ), three concentrations of lemon juice ( 2, 4 and 6 %), three concentrations of tamarind leaf extract (0.05%, 0.1% and 0.15%) with two soaking time duration ; six hours and twelve hours with control. In Rabi seasons, in case of lentil, plant length continued to increase till harvest of young seedlings. Gibberellin(GA 3 ) improve germination percentage of lentil, chickpea, grass pea and cowpea; Seedlings length ,dry matter and germination index of all crops; vigour index of all crops except grass pea, and speed of germination in lentil, chickpea and grass pea. Lemon juice enhanced germination percentage, seedling length, vigour index and germination index in cowpea. Tamarind leaf extract increased the germination percentage in lentil, chickpea, grass pea and cowpea; seedling length in grass pea; vigour index in lentil, chickpea and cowpea; speed of germination in lentil, chickpea and grass 3, pea. In comparison with plant growth regulators, length, weight, was found to be positively correlated and in most cases, relationships were significant.