03718nab a2200337 i 4500003000900000005001700009008004100026040001800067072000800085072000800093100002600101100002800127100002300155100003100178100003000209100003100239245007600270500007400346520116700420520132001587650002202907650002202929650001602951650002102967650001502988650002303003773024703026856008003273942000803353999001903361BR-BrBNA20251022174950.0251022b2020    bl.mr|pooa||| 00| 0 eng |  aBR-BrBNAbeng  aF01  aF61  aSampaio, Pedro R. F.   aRodrigues, Paulo H. V.   aDuarte, Sergio N.   aSousa Neto, Osvaldo N. de   aNascimento, Jéssica G.   aPiedade, Sônia M. de S.   aPhoto-selective nets and potassium concentrations on Costus lasius crop  aPublicação on-line; 26 ref.; 2 illus; 3 tables; Sumaries (En, Pt)  a

ABSTRACT: The practice of using different photo-selective nets, associated with the technique of fertigation, represents a new agrotechnological concept that aims to promote specific physiological responses for growth and production, which are regulated by light. The aims of the study were to evaluate the effect of photoselective nets and potassium concentrations in the fertigation solution on the horticultural performance of Costus lasius. The study was conducted at the Universidade de São Paulo, ESALQ, Piracicaba, SP, Brazil. Three experiments were carried out separately to evaluate five potassium concentrations in the fertigation solution (40, 80, 120, 160 and 200 mg L-1) under three colours of photo-selective nets (red, blue and black) in a randomized block design, with five repetitions. The variables plant height and numbers of leaves, stems and flower buds were evaluated. The data were submitted to the joint analysis of experiments. The association between the K+ concentration of 200 mg L-1 and the black photo-selective net results in higher stem and inflorescence production.

Key words: ornamental flowers, potted flowers, fertigation  a

RESUMO: A prática da utilização de malhas de diferentes colorações, associada à técnica de fertirrigação, representa um novo conceito agrotecnológico que visa promover respostas fisiológicas específicas ao crescimento e à produção que são reguladas pela luz. Neste sentido, o objetivo da pesquisa foi avaliar o efeito, em cultivo protegido, de malhas fotoconversoras e de concentrações de potássio na solução de fertirrigação sobre o desempenho horticultural da Costus lasius. A pesquisa foi conduzida na Universidade de São Paulo, ESALQ, Piracicaba, SP. Foram realizados três experimentos separadamente, para avaliar cinco concentrações de potássio na solução de fertirrigação (40, 80, 120, 160 e 200 mg L-1) em três colorações de malhas fotoconversoras (vermelha, azul e preta), no delineamento em blocos casualizados com cinco repetições. Foram avaliadas as variáveis altura de planta, número de folhas, caules e botões de flores. Os dados foram submetidos à análise conjunta de experimentos. A associação entre a concentração de 200 mg L-1 de K+ e a malha fotoconversora de cor preta resultou em maior produção de hastes e inflorescências.

Palavras-chave: flores ornamentais, flores de vaso, fertirrigação
  aPLANTA ORNAMENTAL  aCULTIVO PROTEGIDO  aCRESCIMENTO  aFERTIRIGAÇÃO  aPOTÁSSIO  aFISIOLOGIA VEGETAL0 035349317784dCampina Grande-PB Universidade Federal de Campina Grande. Centro de Ciências e Tecnologia 1997o2024-4505tRevista Brasileira de Engenharia Agrícola e Ambiental (Brazil)x1415-4366gv. 24 (3) p. 143-148; (2020)wBR2025002171  uhttps://www.scielo.br/j/rbeaa/a/PMtj4VmcDpjkv6HdDrCxqMm/?format=pdf&lang=en  cANA  c338774d338774