Studies on Effect of Plant Growth Regulators on Seed Yield, Quality and Storability of Single Cross Maize Hybrid GH-0727
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Date
2016-06
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University of Agricultural Science, Dharwad
Abstract
A field and laboratory experiments were conducted during kharif 2015 to study the influence of growth regulators on field performance, seed quality and storability of maize hybrid GH-0727 at Saidapur unit, Main Agriculture Research Station and at the Seed Quality and Research Laboratory, National Seed Project (NSP), Dharwad respectively.
The experiment was laid out in randomized complete block design and replicated thrice with nine treatments viz., Control, GA3 (50 ppm), IBA (100 ppm), GA3 (50 ppm) + IBA (100 ppm), GA3 (75 ppm) + IBA (125 ppm), mepiquat chloride (200 ppm), mepiquat chloride (300 ppm), Salicylic acid (1mM) and (1.5mM). Among the treatments, application of GA3 (50 ppm) + IBA (100 ppm) recorded significantly higher plant height at maturity (203.33 cm ), less number of days to 50 % tasseling (53), silking (57.33) and days to maturity (118). Similarly higher number of seeds per row (29.33), test weight (28.06 g), seed yield per hectare (24.87 q) and shelling percentage (83.66) were recorded. Also significantly higher germination percentage (98.30), root length (22.52 cm), shoot length (12.86 cm) and seedling vigour index (3478) were also recorded. The harvested seeds were stored for six months to study the influence of these treatments on seed quality and storability. Among the treatments application of GA3 (50 ppm) + IBA (100 ppm) recorded significantly higher seed quality parameters followed by GA3 (75 ppm) + IBA (125 ppm) at 1st and 2nd month of storage period. Among containers, seeds stored in HDPE bag (700-800 gauge) maintained satisfactory seed quality as per the minimum seed certification standards up to six months of storage period.