STUDIES ON GROWTH AND VIGOUR OF MANGO ROOTSTOCKS AND THEIR RESPONSE TO GRAFTING
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Date
2020
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University of Horticultural Sciences, Bagalkot. (College of Horticulture, Bagalkot).
Abstract
Mango is popularly known as “King of fruits” because of its high palatability,
rich colour, flavour, medicinal and nutritive value. An experiment entitled “Studies on
growth and vigour of mango rootstocks and their response to grafting” was conducted at
College of Horticulture, Bidar, UHS, Bagalkot during 2019. Twelve rootstock varieties
were evaluated in Randomized Complete Block Design with three replications for
germination, growth and vigour. The evaluation of different mango rootstock and scion
varieties on graft success was carried out in Factorial Randomized Complete Block
Design (FRCBD) with two replications.
The maximum stone weight (32.95 g) and stone breadth (4.60 cm) was recorded
in the rootstock Kitchner, while the stone length was maximum with rootstock, Olour
(9.79 cm). However, germination percentage, extent of polyembryony and days taken
for 50 per cent germination was recorded with Nekkare (92.50%), Kurukkan (2.90) and
Starch (43.50 days) respectively. The maximum seedling height, leaf area and vigour
index-I and II was registered with Nekkare (28.27 cm, 44.25 cm2
, 2270.56 cm and
646.56 g respectively).
Among the different grafted rootstocks, Nekkare registered the minimum days
for sprouting, maximum sprout length, graft success, height of grafted plant and number
of leaves per graft (12.47 days, 6.08 cm, 89.17%, 29.24 cm and 18.33/graft
respectively) whereas, the maximum scion girth and root-collar diameter was registered
with Bappakai (5.67 mm and 6.57 mm respectively). In scion varieties, Kesar recorded
the minimum days for emergence of sprouts (15.92 days), maximum sprout length (5.39
cm), graft success (85.83 %), height of grafted plant (26.74 cm), scion girth (5.55 mm)
and root-collar diameter (6.51 mm). Among the different rootstock scion combinations,
Nekkare grafted with Kesar recorded the minimum number of days for sprouting (11.4
days), maximum sprout length (7.15 cm), graft success (95%), height of grafted plant
(33.55 cm) and number of leaves per graft (19.7) whereas, scion girth and root-collar
diameter was found non-significant.