Thermal requirement for phenophases of mango varieties in the sub-humid tropics of east-central India
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Mangifera indica L., growing degree days, heliothermal unit, heat use efficiency, phenophasesIssue
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Abstract
Mango flowering and fruiting phenophases are influenced by both genetics and environmental factors. An experiment was conducted with nine mango varieties at Jagdalpur during 2018-2020 to study the influence of heat units, photothermal units and heliothermal units on phenology of mango varieties. The growing degree days, heliothermal unit and photothermal unit were recorded lower for many phenophases of early maturing varieties like Dasheheri, Alphonso and MahmoodBahar. Majority of phenophases showed higher heat use efficiency for Sundreja and lowest for MahmoodBahar. Days taken to panicle emergence toappearance of 50% flowering, days to 50 % flowering to full bloom and days to full bloom to first fruit set, all have a significant negative correlation with heat use efficiency. All the phenophases were positively correlated to growing degree days.
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