EFFECT OF GIBBERELLIC ACID PRE TREATMENTS ON GROWTH PARAMETERS OF WALNUT (Juglans regia L.)

Abstract

Present investigation was carried out during the winter season at Horticulture Research block, 
Department of Horticulture, Shri Guru Ram Rai University, Dehradun, Uttarakhand. To 
investigate the effect of GA3 treatment on growth attributes and days taken for germination 
initiation of walnut. The experiment was laid out in randomized block design with three 
replications and twelve treatments. The treatments comprised following levels of GA3 
concentrations viz. 500ppm, 1000ppm, 15000ppm and control in three different replications of 
Horticultural Research Block. Various observations regarding growth parameters such as leaf 
length, leaf width, shoot length, shoot width and numbers of days taken for germination initiation 
of walnut were recorded. The result revealed that treatment of GA3 1500ppm of nursery polybag 
application found to be beneficial for vegetative characters viz, found to be the most effective 
treatment for increasing leaf length, shoot length and shoot diameter. In another point of view, 
1500ppm GA3 treatment in polyhouse was found to be profitable as compared to rest of 
treatments in terms of number of days taken for germination. Apart from this leaf width of 
1000ppm in nursery polybag was found best.