Investigando a influência de fatores abióticos no crescimento e na fenologia de Gypsophila paniculata L. ‘Overtime®’
DOI:
https://doi.org/10.1590/2447-536X.v32.e323068Palavras-chave:
Correlação, desenvolvimento, matéria seca, taxa de crescimentoResumo
O objetivo desta pesquisa foi caracterizar a fenologia e fenometria da Gypsophila paniculata L. ‘Overtime®’ em condições de campo, bem como determinar a correlação entre os fatores abióticos (temperatura média e umidade relativa do ar, déficit de pressão de vapor e graus-dia) e as variáveis fenométricas (comprimento e diâmetro do caule, número de nós, entrenós, folhas e brotos e matéria seca). Também foram determinadas as taxas de crescimento absoluta e relativa. Para a coleta dos dados de campo, se utilizou um delineamento em blocos casualizados, cada bloco contendo de quatro a cinco plantas, constituindo a unidade experimental. O ciclo de cultivo da G. paniculata foi avaliado desde o transplante até a fase de senescência, com duração total de 132 dias após o transplante. As fases de desenvolvimento da espécie foram caracterizadas em detalhe, atingindo a fase da colheita comercial aos 91 dias após o transplante, durante a floração, o que correspondeu a soma térmica de 1255,1 °C dia. Observou-se um padrão de crescimento sigmóide ao longo dos estágios fenológicos sucessivos, atingindo a taxa absoluta máxima de crescimento entre os 60 – 75 dias após o trasplante. Durante este peróodo, fatores exógenos foram integrados ao sistema, incluido luz artificial suplementar e de ácido giberélico, para aumentar o crescimento e induzir o florescimento. Além disso, 75 dias após o transplante a taxa de crescimento absoluto diminui à medida que os assimilados deslocam-se para o processo do florescimento. Entre as variáveis fenométricas, apenas o comprimento do caule foi significativamente influenciado pela temperatura, umidade relativa e o déficit de pressão de vapor, indicando que esses fatores ambientais modulam a dinâmica de crescimento ao longo do ciclo da cultura. Estas descobertas fornecem novos conhecimentos sobre as respostas no crescimento e no desenvolvimento da espécie e contribuem para o aprimoramento das práticas de manejo agronômico em condições ambientais variáveis.
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Copyright (c) 2025 Jessica Paulina Chillagana Anaguano, María Yumbla-Orbes, Lenin Javier Ron Garrido, Wellington Augusto Bastidas Guevara, Javier M. Osorio Leyton
Este trabalho está licenciado sob uma licença Creative Commons Attribution 4.0 International License.
