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Effect of temperature variations on phenology and horticultural traits of guava under North-west Indian conditions

J. Brar,N. Arora,Krishan Kumar,R. Boora,G. Kaur

Published 2021 in Journal of Agrometeorology

ABSTRACT

Guava (Psidium guajava L.) is an evergreen fruit tree, which is grown throughout India. In Punjab, it is the second most important fruit crop after Kinnow and occupies an area of 9,580 hectares area (Anon., 2019). In Punjab, guava produces two distinct crops in a year i.e. rainy and winter season crops. Generally, the flowering for rainy season crop occurs in April-May and for winter season crop, it occurs in July-August (Bal, 2015). The fruits of rainy and winter season crops mature during July-August and November-December, respectively. Rainy season crop has high yields while the winter season fruits are of superior quality by virtue of low incidences of fruit fly and fruit-borer (Boora et al., 2016). Although, guava is a tropical fruit crop, but in Punjab (North-Western India), it is being cultivated under subtropical climate. Under this climate, the physiological growth of the guava starts with the rise of temperature in spring. However, the start of spring is determined by the length of winters in north-west India, which is variable. The information on impact of temperature variability on phenological clock of guava is lacking. Further, for onset of a particular phenological phase, the specific temperature requirement must be met (Islam et al., 2019), which can be reliably measured in terms of heat units (Padilla-Ramirez et al., 2012). The heat unit information for different phenological phases may prove useful in formulating area specific crop management practices to avert sudden climatic risks (Islam et al., 2019). In Punjab (North-Western India), the year 2019 was a relatively cooler than 2018. The study aimed to assess the impact of these inter-annual temperature variations on phenology and horticultural traits of guava; and also to estimate the accumulated heat units for onset of different phenological stages in guava.

PUBLICATION RECORD

  • Publication year

    2021

  • Venue

    Journal of Agrometeorology

  • Publication date

    2021-10-05

  • Fields of study

    Agricultural and Food Sciences, Geography

  • Identifiers
    DOI 10.54386/JAM.V23I3.46
  • External record

    Open on Semantic Scholar

  • Source metadata

    Semantic Scholar

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