Evaluation of plant growth regulators effect on growth and yield in ginger transplants under polyhouse

Abstract

The study evaluates plant growth regulators (PGRs) stimulus on growth and yield attributes in ginger transplants under polyhouse conditions. In this study, PGRs including CCC, GA3, NAA and BAP at three concentration levels (50ppm, 100ppm, and 150ppm) with water as control were given at 90, 120 days after transplanting. All the growth regulators proved effective in improving growth and yield attributes as compared with control. The findings revealed that NAA application at 150 ppm gave the highest plant height (114.0 cm), while CCC 150 ppm recorded the lowest plant height (54.89 cm). BAP application at 100 ppm produced the highest number of pseudostems per clump (19.59). The highest rhizome yield (304 g/plant) was obtained at 150 ppm of CCC. The highest rhizome diameter (2.49 cm) and number of primary rhizome (14.52) were noted with CCC 100 ppm. The longest rhizome length was observed with CCC 50 ppm. Application of NAA 100 ppm produced maximum number of secondary rhizomes (13.99). Number of tertiary rhizomes was the highest in GA3 150 ppm (10.59). According to this experimental findings, foliar application of cycocel improved the yield in ginger transplants grown in polyhouse conditions. Therefore, the study confirmed that polyhouse cultivation combined with application of plant growth regulators could enhance ginger productivity.