SCREENING OF PAPAYA GENOTYPES UNDER WATERLOGGING CONDITION AND ITS MANAGEMENT
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Date
2022
Authors
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Journal ISSN
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Publisher
DRPCAU, PUSA
Abstract
The present investigation entitled “Screening of papaya genotypes under
waterlogging condition and its management” was carried out during 2021-2022 in
HI-tech horticulture unit, Department of Horticulture, Dr. Rajendra Prasad Central
Agricultural University, Pusa, Samastipur (Bihar).
The research work was carried out with two experiments, first experiment was
laid out in Two-factorial Completely Randomized Design (CRD) with 9 different
types of treatment viz., Control( without waterlogging) + Red lady, Submergence 10
cm above soil surface + Red Lady, Submergence 15 cm above soil surface + Red
Lady, Control( without waterlogging) + Pusa Delicious, Submergence 10 cm above
soil surface + Pusa Delicious, Submergence 15 cm above soil surface + Pusa
Delicious, Control( without waterlogging) + Local Collection 1, Submergence 10 cm
above soil surface + Local Collection 1, Submergence 15 cm above soil surface +
Local Collection 1 which were replicated three times.
The results of the investigation revealed that, among the different genotypes
used Pusa Delicious gave better performance in different levels of waterlogged
condition on growth and physiological parameters.
With reference to different genotypes, Pusa Delicious recorded maximum
plant height (78.23cm), relative growth rate (0.04), shoot length (64.62cm),
chlorophyll index (44.57), relative water content (89.31%), fresh weight of shoot
(187.57g), fresh weight of root (43.40g), dry weight of shoot (22.53g), dry weight of
root (8.31g), number of leaves (8.11), leaf area (2.07m2), root length (23.63 cm), root
to shoot ratio (0.31), survival (66.66%), flood tolerance potential (1) and lowest leaf
senescence (13.63 %).
Second was laid out in Three-factors Completely Randomized Design (CRD)
with 12 different types of treatment viz., Submergence 10 cm above soil surface +Red
Lady + 5 MgO₂, Submergence 10 cm above soil surface + Red Lady +10g MgO₂,
Submergence 15 cm above soil surface + Red Lady + 5g MgO₂, Submergence 15 cm
above soil surface + Red Lady +10g MgO₂, Submergence 10 cm above soil surface+
Pusa Delicious + 5g MgO₂, Submergence 10 cm above soil surface + Pusa Delicious
+ 10g MgO₂, Submergence 15 cm above soil surface + Pusa Delicious + 5g MgO₂,
Submergence 15 cm above soil surface +, Pusa Delicious + 10g MgO₂, Submergence
10 cm above soil surface + Local Collection 1 + 5g MgO₂, Submergence 10 cm above
soil surface + Local Collection 1+10g MgO₂, Submergence 15 cm above soil surface
+ Local Collection 1 + 5g MgO₂, Submergence 15 cm above soil surface+ Local
Collection 1+ 10g MgO₂.
The results of the investigation showed that, among the different concentration
of chemicals ( 5g and 10 g MgO₂), 10 g gave better performance under waterlogged
condition on growth and physiological parameters of three genotypes.
With refers to different treatment, submergence 10 cm above soil surface +
Pusa Delicious + 10g MgO₂ recorded the maximum plant height (85.25cm), relative
growth rate (0.06), shoot length (70.24 cm), chlorophyll index (49.70), relative water
content (93.40%), fresh weight of shoot (198.74g), fresh weight of root (50.49 g), dry
weight of shoot (26.42 g), dry weight of root (11.50 g), number of leaves (10.32), leaf
area (2.41m2), root length (32.19cm), root to shoot ratio(0.41), survival percentage
(66.66%), flood tolerance potential (1) and lowest leaf senescence (-3.38 %)