EFFECT OF DIFFERENT PRE-SOWING SEED TREATMENTS ON SEED GERMINATION AND SEEDLING GROWTH PARAMETERS OF PAPAYA (Carica papayaL.)
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Date
2020
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Indira Gandhi Krishi Vishwavidyalaya, Raipur (C.G.)
Abstract
The present investigation entitled “Effect of different pre-sowing seed treatments on seed germination and seedling growth parameters of papaya (Carica papaya L.)” was conducted under protected conditions during the year 2018 and 2019 in net house, located at Intructional cum Research Farm,College of Agriculture and Research Station, (IGKV), Bemetara District of Chhattisgarh. The experiment was conducted under completely randomized design (CRD) replicated thrice. The treatments were applied in combination of 20 polybags in each treatment and 1020 bags in a three replications.
The results showed that the treatment T11 (150 ppm GA3 + 12 hours + Azotobacter) gave significantly higher emergence rate (79.38%), highest germination (94.17%) and least time required for germination (6.83 days).The treatment T11 (150 ppm GA3 + 12 hours + Azotobacter) was found best and significantly superior for the growth of papaya saplings as it gave the maximum growth parameters in terms of stem girth (1.72 mm, 1.88 mm, 3.88 mm and 4.84 mm at 15, 30, 45 and 60 DAS, respectively), length of shoot (13.85 cm, 18.32cm, 22.14cm and 28.38 cm at 15, 30, 45 and 60 DAS, respectively) and at 60 days after seed sowing, height of sapling (41.87 cm), number of roots (18.65), length of root (13.46 cm), fresh weight of root (2.88 g), dry weight of sapling (2.76 g), seedling vigour index-I (3939.83) and seedling vigour index-II (259.61). Whereas, T15 (seed soaking with cow urine 10 (%)+ 12 hours + Azotobacter) gave maximum number of leaves (4.48, 7.58, 12.02 and 12.83 at 15, 30, 45 and 60 DAS, respectively) and 60 days after seed sowing, fresh weight of shoot (18.50), fresh weight of sapling (21.31 g) and root : shoot ratio (1.07).
The treatment T11 (150 ppm GA3 + 12 hours + Azotobacter) gave highest benefit- cost ratio of papaya saplings (1.60).
Description
EFFECT OF DIFFERENT PRE-SOWING SEED TREATMENTS ON SEED GERMINATION AND SEEDLING GROWTH PARAMETERS OF PAPAYA (Carica papayaL.)