Resumo -A pitaya é uma cactácea originária das florestas tropicais americanas que produz frutos exóticos bem apreciados e comercializados, principalmente no continente asiático. Contudo, ainda é uma espécie vegetal que demanda informações técnicas de cultivo nas áreas agrícolas brasileiras, motivando pesquisas em várias áreas do conhecimento. Objetivou-se avaliar diferentes substratos no enraizamento de cladódios imersos e não imersos no regulador de crescimento, ácido naftalenacético (ANA), na formação e desenvolvimento inicial de raízes em estacas de Hylocereus undatus, resultando em mudas mais vigorosas e de melhor qualidade. O experimento foi conduzido sob ripado no Departamento de Produção Vegetal -setor de Horticultura da Faculdade de Ciências Agronômicas no campus de Botucatu -UNESP. O delineamento experimental foi o inteiramente aleatorizado em esquema fatorial 4 x 2 (substratos x condições) com quatro repetições. Após 60 dias da instalação do experimento foram avaliados: massa fresca e seca da parte aérea, massa fresca e seca das raízes e o comprimento da maior raiz. O crescimento e desenvolvimento radicular inicial de mudas não são influenciados pelo regulador vegetal ANA. Os substratos com a presença de areia são os mais adequados para a formação de mudas vigorosas e de boa qualidade. A mistura areia + esterco bovino proporciona maior acúmulo de fitomassa no sistema radicular de pitaya (H. undatus).Palavras-chave -Cactácea. Estaquia. Raízes Adventícias. Abstract -The pitaya, a cactaceous species native to American tropical forests, produces well-appreciated and commercialized exotic fruits, mainly in the Asian continent. However, this plant species still requires technical information regarding cultivation in Brazilian agricultural areas, encouraging thus studies in several knowledge areas. This work aimed to evaluate the effect of different substrates on the rooting of cladodes immersed or not in the plant growth regulator naphthaleneacetic acid (ANA), as well as on root formation and initial development of Hylocereus undatus cuttings, which provides more vigorous and higher-quality seedlings. The experiment was carried out in a lath house of the Department of Plant Production -Horticulture Sector, College of Agronomical Sciences, Botucatu Campus, São Paulo State University (UNESP). Experimental design was completely randomized, in a 4x2 (substrates x conditions) factorial arrangement, with four replicates. At 60 days after the experiment establishment, shoot fresh and dry matter, root fresh and dry matter, and the highest root length were evaluated. The initial root growth and development of seedlings were not influenced by ANA. Substrates containing sand were the most suitable to produce vigorous and high-quality seedlings. Sand+manure bovine mixture provided higher phytomass accumulation in the root system of pitaya (H. undatus).
Flowers have been designed primarily for cutting because of the diversity of shapes, colors and also durability. However, ornamental plants are used in floral arrangements in vases and have limited shelflife. Thus, this study showed that one of the factors contributing to this limitation is the physiological blockage that occurs in plants in response to stress imposed by harvest.
Substrates and boron on the rooting of red pitaya cuttingsPitaya, a climbing fruit species belonging to the cactus family, has been largely commercialized in the Brazilian exotic fruit market. This study aimed to evaluate the effect of different substrates on the rooting of cladodes with the base immersed or not in boric acid solution. There was also evaluated the formation and initial development of roots, resulting in more vigorous, high-quality seedlings with higher survival rates. The experiment was carried out in a lath house of the Department of Plant Production, Horticulture Sector, College of Agronomical Sciences, Botucatu Campus, São Paulo State University (UNESP). The experiment was arranged in a complete randomized design, in a 4x2 (substrates x boron) factorial arrangement, with four replicates. Sixty days after the experiment establishment, shoot fresh and dry matter, root fresh and dry matter, and the highest root length were evaluated. The initial root growth and development of cuttings were affected by the substrates and boron. Sand+manure provided higher phytomass accumulation in the shoot and root system of red pitaya. Among the substrates, the treatment sand + cattle manure was the most suitable to produce more vigorous and high-quality seedlings.
Resumo Objetivou-se com este trabalho avaliar aspectos produtivos e de qualidade de meloeiros (Cucumis melo L.) sob diferentes formas de cultivo em Petrolina/PE durante dois ciclos produtivos. Adotou-se delineamento experimental de blocos casualizados com parcelas subsubdivididas em esquema fatorial 2 x 2 x 3, sendo, dois híbridos de melão amarelo (Gladial e SF 10/00 F1) nas parcelas, dois arranjos do sistema de irrigação (uma e duas fileiras de gotejadores por fileira de plantas) nas subparcelas, e três tipos de coberturas do solo (mulchings preto e cinza e sem cobertura) nas subsubparcelas, com seis repetições. Foram avaliados, comprimento, largura e número total e comercial de frutos, produtividade, uso eficiente da água, sólidos solúveis totais, firmeza e acidez da polpa. Os maiores índices de produtividade, uso eficiente da água e número de frutos comerciais foram obtidos com o uso de mulching (independente da cor) com uma fileira de gotejadores por fileira de plantas. Para os índices pós-colheita os tratamentos não diferiram entre si.
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