GROWTH AND QUALITY OF ‘PÉROLA’ PINEAPPLE AS A FUNCTION OF LEVELS OF GIBBERELLIC ACID

Gibberellin is a plant hormone capable of enhancing the productivity of plant’s productivity rants, due to its action in plant physiology, mainly in fruit formation. In this sense, this study aimed to evaluate gibberellic acid levels and application times on the growth and quality of ‘Pérola’ pineapple. The experiment was conducted under field conditions in the municipality of Pedras de Fogo, state of Paraíba, Brazil. The treatments consisted of five levels of gibberellic acid (0.0, 1.5, 3.0, 6.0, and 12.0 mg/plant), distributed in a randomized block experimental design, with four repetitions, in which three applications were made at 50, 80, and 110 days after flower induction. The soluble solids content, fruit height, fruit diameter, and weight were evaluated. The period of application and the levels of gibberellic acid altered the responses for the variables analyzed. The level of 7.5 mg/plant of gibberellic acid promoted an increase in the weight and diameter of the fruit. The application at 110 days after floral induction induced an increase in fruit weight and a greater concentration of sugar in the fruit. Further studies on the application of gibberellic acid and periods of application in different soil and climatic conditions should be carried out to determine more consistent results with this crop.Gibberellin is a plant hormone capable of enhancing the productivity of plant’s productivity rants, due to its action in plant physiology, mainly in fruit formation. In this sense, this study aimed to evaluate gibberellic acid levels and application times on the growth and quality of ‘Pérola’ pineapple. The experiment was conducted under field conditions in the municipality of Pedras de Fogo, state of Paraíba, Brazil. The treatments consisted of five levels of gibberellic acid (0.0, 1.5, 3.0, 6.0, and 12.0 mg/plant), distributed in a randomized block experimental design, with four repetitions, in which three applications were made at 50, 80, and 110 days after flower induction. The soluble solids content, fruit height, fruit diameter, and weight were evaluated. The period of application and the levels of gibberellic acid altered the responses for the variables analyzed. The level of 7.5 mg/plant of gibberellic acid promoted an increase in the weight and diameter of the fruit. The application at 110 days after floral induction induced an increase in fruit weight and a greater concentration of sugar in the fruit. Further studies on the application of gibberellic acid and periods of application in different soil and climatic conditions should be carried out to determine more consistent results with this crop

Brotação inicial, teor de sólidos solúveis e índice de maturação da cana-de-açúcar submetida à adubação com torta de filtro enriquecida / Initial breasting, soluble solids content and sugar cane maturation index submitted to fertilization with enriched filter pie

A torta de filtro é um subproduto da cana-de-açúcar e é utilizado no fornecimento de fósforo para a referida cultura. Nessa perspectiva, o objetivo do trabalho foi avaliar o efeito da torta de filtro enriquecida sob o número de brotações, o teor de sólidos solúveis e o índice de maturidade da variedade de cana-de-açúcar RB041443 cultivada nos solos dos tabuleiros costeiros da Paraíba. O trabalho foi conduzido na Usina Monte Alegre S/A, no município de Mamanguape-PB. O experimento foi montado em delineamento de blocos casualizados com 12 tratamentos (T1 – Testemunha (apenas MAP), T2 – Torta, T3 – Torta + MAP, T4 – Torta + Gesso, T5 – Torta + Fosfato, T6 – Torta + Bagaço, T7 – Torta + MAP + Gesso, T8 – Torta + MAP + Fosfato, T9 – Torta + MAP + Bagaço, T10 – Torta + Gesso + Fosfato, T11 – Torta + Gesso + Bagaço, T12 – Torta + Fosfato + Bagaço) com quatro repetições, totalizando 48 parcelas. O número de brotações, foi determinado aos 26 dias após o plantio (DAP) da cana-de-açúcar, por meio da contagem direta do número de perfilhos em um metro linear dentro de cada subparcela. Para as variáveis Teor de Sólidos Solúveis (°BRIX) e Índice de Maturação a avaliação foi realizada aos 282 dias (9 meses) em 5 plantas por parcela de cada tratamento. Os resultados encontrados foram satisfatórios, de forma que a a aplicação da torta de filtro enriquecida possibilitou incremento no número de brotações da variedade RB041443, principalmente no tratamento T9 que foi superior aos demais, sendo esse uma boa alternativa na adubação de plantio da referida cultura e para as demais variáveis todas foram superiores a testemunha. 

GROWTH AND QUALITY OF ‘PÉROLA’ PINEAPPLE AS A FUNCTION OF LEVELS OF GIBBERELLIC ACID

Gibberellin is a plant hormone capable of enhancing the productivity of plant’s productivity rants, due to its action in plant physiology, mainly in fruit formation. In this sense, this study aimed to evaluate gibberellic acid levels and application times on the growth and quality of ‘Pérola’ pineapple. The experiment was conducted under field conditions in the municipality of Pedras de Fogo, state of Paraíba, Brazil. The treatments consisted of five levels of gibberellic acid (0.0, 1.5, 3.0, 6.0, and 12.0 mg/plant), distributed in a randomized block experimental design, with four repetitions, in which three applications were made at 50, 80, and 110 days after flower induction. The soluble solids content, fruit height, fruit diameter, and weight were evaluated. The period of application and the levels of gibberellic acid altered the responses for the variables analyzed. The level of 7.5 mg/plant of gibberellic acid promoted an increase in the weight and diameter of the fruit. The application at 110 days after floral induction induced an increase in fruit weight and a greater concentration of sugar in the fruit. Further studies on the application of gibberellic acid and periods of application in different soil and climatic conditions should be carried out to determine more consistent results with this crop.Gibberellin is a plant hormone capable of enhancing the productivity of plant’s productivity rants, due to its action in plant physiology, mainly in fruit formation. In this sense, this study aimed to evaluate gibberellic acid levels and application times on the growth and quality of ‘Pérola’ pineapple. The experiment was conducted under field conditions in the municipality of Pedras de Fogo, state of Paraíba, Brazil. The treatments consisted of five levels of gibberellic acid (0.0, 1.5, 3.0, 6.0, and 12.0 mg/plant), distributed in a randomized block experimental design, with four repetitions, in which three applications were made at 50, 80, and 110 days after flower induction. The soluble solids content, fruit height, fruit diameter, and weight were evaluated. The period of application and the levels of gibberellic acid altered the responses for the variables analyzed. The level of 7.5 mg/plant of gibberellic acid promoted an increase in the weight and diameter of the fruit. The application at 110 days after floral induction induced an increase in fruit weight and a greater concentration of sugar in the fruit. Further studies on the application of gibberellic acid and periods of application in different soil and climatic conditions should be carried out to determine more consistent results with this crop