Growing degree days requirement of mango cultivars for maturity under sub humid plateau region of Eastern India.
Mathura Rai, Vishal Nath, Bikash Das, Ashok Rai
Author Affiliation: Horticulture and Agro-Forestry Research Programme, Ranchi - 834 010, Jharkhand, India.
Orissa Journal of Horticulture 31 : 13-17
Abstract : The growing degree-days requirement (GDD) for fruit maturity of 71 mango cultivars/hybrids under sub-humid plateau region of eastern India, were determined during 2000-01 at HARP, Ranchi, Jharkhand, India. The GDD requirement (°C) ranged from 1660.38 in Mithua to 3222.25 in Kataki. Accordingly, based on the GDD requirement, the cultivars/hybrids were classified into five different groups: requiring less than 1800°C, requiring 1800-2000°C, requiring 2000-2200°C, requiring 2200-2400°C and requiring more than 2400°C of GDD for fruit maturity. Diversity in fruit maturity was observed from 17 May (Rani Pasand) to 15 August (Kataki). Based on the date of maturity, the cultivars were classified into five different groups: very early, early, medium, late and very late.