STUDIES ON MEDIA AND PRE TREATMENTS OF GA3 ON SEED GERMINATION, GROWTH AND SEEDLING VIGOUR OF AONLA (Emblica officinalis Gaertn.) AND CUSTARD APPLE (Annona squamosa L.)
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Date
2018-07
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University of Horticultural Sciences, Bagalkot (COLLEGE OF HORTICULTURE, BAGALKOT
Abstract
The present investigation entitled "Studies on media and pre treatments of GA3 on seed germination, growth and seedling vigour of aonla (Emblica officinalis Gaertn.) and custard apple (Annona squamosa L.)" was carried out during the year 2017-18 at Department of Fruit Science, University of Horticultural Sciences, Bagalkot. Among the different growing media, Soil: Sand: FYM (1:1:1) recorded significantly the highest germination percentage (39.25) and survival percentage (88.72) in aonla and similar was registered in custard apple (53.20 and 90.88). The highest shoot length (36.10 cm) and number of leaves (61.98) in aonla was recorded in Soil: Sand: Cocopeat: Vermicompost (1:1:1:1) and similar was recorded in (25.88 cm and 19.08) custard apple. The highest length of tap root (25.50 cm) and length of secondary root (11.29 cm) in aonla was recorded in Soil: Sand: Cocopeat: Vermicompost (1:1:1:1) and similar was recorded in (30.97 cm and 10.62 cm) custard apple. Among the pre treatments, GA3 of 200 ppm recorded significantly the highest germination percentage (75.75) and minimum days required for germination (6.53) in aonla and similar was recorded in custard apple (68.12 and 25.48). The highest length of tap root (37.65 cm) and length of secondary roots (18.50 cm) in aonla was registered in GA3 of 200 ppm and similar was recorded in custard apple (43.63 cm and 14.37 cm). Among the treatment combinations, the highest germination percentage (77.00) and survival percentage (96.87) was recorded highest in Soil: Sand: Cocopeat: Vermicompost (1:1:1:1) with 200 ppm GA3 treatment combination in aonla and similar was recorded in custard apple (71.75 and 96.21).
From the observations of the present studies it can be concluded that, Soil: Sand: FYM (1:1:1) proved better for germination while Soil: Sand: Cocopeat: Vermicompost (1:1:1:1) proved better in shoot and also root parameters. Among the different pre treatments, GA3 of 200 ppm recorded maximum germination, shoot and root parameters. Soil: Sand: Cocopeat: Vermicompost (1:1:1:1) with 200 ppm GA3 treatment combination performed well in root and shoot parameters compared to all other treatment combinations.