THE PHENOLOGICAL GROWTH AND THERMAL SUM OF ‘Hass’ AVOCADO FRUITS

  • Alian Cássio Pereira Cavalcante Centro de Ensino Superior de São Gotardo, São Gotardo, Minas Gerais, Brasil. https://orcid.org/0000-0002-7577-5607
  • Carlos Eduardo Magalhães dos Santos Universidade Federal de Viçosa – UFV, Viçosa, Minas Gerais, Brasil.
  • Adailza Guilherme Cavalcante Universidade Estadual de São Paulo – UNESP, Jaboticabal, São Paulo, Brasil.
  • Guilherme Antonio Vieira de Andrade Universidade Federal de Lavras, Lavras, Minas Gerais, Brasil.
  • Eli Matheus de Souza Lopes Universidade Federal de Viçosa – UFV, Rio Paranaíba, Minas Gerais, Brasil.
  • Leonardo Angelo de Aquino Diretor Agrônomico do IPACER
Palavras-chave: Fruit growth, Degree-day, Persea americana Mill, Management

Resumo

Avocado is a perennial fruit grown in tropical and subtropical climates, and climatic diversity can alter fruit maturation. This study evaluated the phenological growth stages of ‘Hass’ avocado fruits ‘Hass’ using the Biologische Bundesanstalt Bundessortenamt und Chemische Industrie (BBCH) scale and the degree-day sum (thermal sum) to determine the requirements for efficient cultivation. From August 2018 to June 2019, avocado growth was monitored from stage 711 (initial ovary growth) to stage 719 (>90 % of the final size) in Alto Paranaíba, Minas Gerais, Brazil. At each phenological stage, the longitudinal and transversal diameters and fresh and dry masses were measured, and the dry mass percentage and accumulated thermal sum were calculated. Cultivation dates were estimated based on flowering and the thermal sum requirements at each growth stage. The largest ‘Hass’ avocados were observed at stage 718 (based on diameter, fresh mass, and dry matter content), requiring 2778.9 °C total.

Publicado
2024-04-19
Seção
Ciências Agrárias