Phenology and production of guava cultivars, using two methods of vegetative propagation, subjected to fruiting pruning times in the Brazilian Semiarid Júlio Ferreira de Souza Filho, Gustavo Alves Perreira, Jenilton Gomes da Cunha, Kauany Missenna Zanon de Andrade, Matheus Hamilton Ghilardi de Almeida, et al. Revista Brasileira De Geografia Fisica, 2025 Guava (Psidium guajava L.) is known for its wide adaptation to different soil and climate conditions. However, the climatic seasonality of the growing regions exposes the plants to different environmental conditions, capable of influencing their phenology and production. Therefore, determining the behavior of cultivars at different fruiting pruning times is an important tool for crop planning. Thus, the present study aims to evaluate the phenological and productive behavior of guava cultivars, propagated vegetatively at different fruiting pruning times in the semiarid region. The experiment was conducted in randomized blocks, during the period from 2022 to 2023, in a 3 x 6 double factorial arrangement, the factors corresponded to: i) pruning season (rainy-dry, dry-rainy and dry) and, ii) cultivar + propagation method ('Paluma' grafted, 'Paluma' cutting, 'Tailandesa Vermelha' grafted, 'Tailandesa Vermelha' cutting, 'Tailandesa Branca' grafted and 'Tailandesa Branca' cutting). The phenological cycle and productive attributes were evaluated. The results revealed that the propagation methods do not alter the phenological cycle of the cultivars, which was 184 to 196 days. The grafting method provided better productive indices (number of fruits, production, average fruit weight) in the 'Paluma' and 'Tailandesa Branca' cultivars, in the 3 pruning seasons. The cultivars showed a reduced cycle between pruning and harvesting in the dry season. The productive potential of guava is greater in the dry-rainy season. The cultivar 'Tailandesa Branca' propagated by grafting with pruning in the dry-rainy season proved to be more promising in the semiarid region.
Agrometeorological conditioning in lettuce cultivars Gabriel Siqueira Tavares Fernandes, Edivania de Araujo Lima, Adriana Ursulino Alves, Victor Alves Brito, Lucas Carvalho Soares Revista Brasileira De Meteorologia, 2019 Resumo Objetivou-se avaliar a adaptação de cultivares de alface com base na metodologia dos graus-dia, em estufa, no vale do Gurguéia. O experimento foi conduzido em ambiente protegido, na Universidade Federal do Piauí - UFPI/CPCE. O delineamento adotado foi em blocos ao acaso, sendo os tratamentos cultivares de alface. As cultivares utilizadas foram: Simpson, Bruna, Palmas e Grand Rapids - TBR. Os dados meteorológicos (temperatura do ar, umidade relativa, pressão atmosférica, velocidade dos ventos e precipitação) foram obtidos em uma estação meteorológica portátil que foi instalada no ambiente protegido. A temperatura do ar durante o experimento apresentou máxima de 33 °C e mínima de 26 °C. As cultivares ‘Simpson’ e ‘Grand Rapids’ apresentaram um ciclo mais precoce (45 dias), quando comparada às demais (52 dias), ambas com constante térmica (CT) de 898 °gd. As cultivares ‘Bruna’ e ‘Palmas’ apresentaram CT = 1050 °gd. Dentre as cultivares avaliadas, as cultivares ‘Palmas’ e ‘Bruna’ obtiveram comportamento e morfologia adequados em relação às altas temperaturas regionais. Dessa forma, conclui-se que as cultivares ‘Palmas’ e ‘Bruna’ possuem potencial produtivo para a região, quando cultivada em ambiente protegido.
