Biometria e teor de flavonoides de Passiflora incarnata L. submetida às lâminas de irrigação e doses de fosfato natural reativo
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Data
2019-08-30
Autores
Soares, Edhielle Vanessa de Lima
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Universidade Estadual Paulista (Unesp)
Resumo
Com trabalho objetivou-se avaliar a influência da adubação fosfatada e o efeitode quatro níveis de irrigação sobre o rendimento de fitomassa e o acúmulo de flavonoides em Passiflora incarnata L. O experimento foi conduzido em uma casa de vegetação no departamento de Solos e Recursos Ambientais FCA/ UNESP, em Botucatu. Foram utilizados quatro níveis de irrigação baseados na evaporação do Tanque Classe A (50%, 75%, 100% e 125% da evapotranspiração da cultura), além de cinco doses de fosfato reativo natural Bayóvar® (0, 500, 1000, 1500, 2000 mg dm-3 ), em 6 repetições. As avaliações foram realizadas nos dois cortes da cultura, antes da colheita, sinalizada pela abertura de 50% das flores. Os dados obtidos foram: índicede flavonoides (IFLV) e Índice de clorofila (ICHL) com o Dualex Scientific®, índice de vegetação por diferença normalizada (NDVI) com o GreenSeeker®, número de folhas(NF), altura (ALT), diâmetro do caule (DIAM), fitomassa fresca (FF) e fitomassa seca (FS). O material inteiro (folhas e caules) seco foi direcionado para a análise de flavonoides e teor de nutrientes. As amostras de solo, no final do ciclo, foram enviadaspara análise química. Os resultados foram submetidos à análise de variância a 5 % deconfiança, com análise de regressão. Constatou-se que o IFLV foi influenciado positivamente pelas menores doses de fósforo no primeiro corte, e no segundo corte,pela maior lâmina de irrigação. As medidas de clorofila apresentaram comportamento linear crescente em relação às doses do adubo. O aumento do fornecimento hídrico influenciou negativamente as medidas de clorofila nos dois cortes, e somente de maneira quadrática, com ponto máximo na lâmina de 50% ETC, no primeiro corte. Das medidas de crescimento, somente o número de folhas foi beneficiado pelo incremento das lâminas de irrigação. Os maiores teores de vitexina foram obtidos com a aplicação da maior lâmina de irrigação. O conteúdo de fósforo foi influenciado positivamente pelas doses de fosfato natural, e o conteúdo de magnésio afetado pelas maiores reposições hídricas. Portanto, as lâminas de irrigação influenciaram os aspectos biométricos, acúmulo de fitomassa e de flavonoides em plantas de P. incarnata L.
This study aimed to evaluate the influence of phosphate fertilization and the effect of four levels of irrigation on the yield of phytomass and the accumulation of flavonoids in Passiflora incarnata L. The experiment was conducted in a vegetation house in the department of Soil and Environmental Resources FCA/UNESP, in Botucatu. Four levels of irrigation based on the evaporation of the Class A Tank (50%, 75%, 100% and 125% of crop evapotranspiration) were used, in addition to five doses of Bayóvar® natural reactive phosphate (0, 500, 1000, 1500, 2000 mg dm-3), in 6 repetitions. Evaluations were performed in both sections of the crop, before harvesting, indicated by the opening of 50% of the flowers. The data obtained were: flavonoid index (IFLV) and chlorophyll index (ICHL) with Dualex Scientific®, vegetation index by normalized difference (NDVI) with GreenSeeker®, number of leaves (NF), height (ALT), stem diameter (DIAM), fresh biomass (FF) and dry biomass (FS). The dried whole material (leaves and stems) was directed to flavonoid and nutrient content analysis. The soil samples, at the end of the cycle, were sent for chemical analysis. The results were submitted to analysis of variance at 5% confidence, with regression analysis. It was found that the IFLV was positively influenced by the lower doses of phosphorus in the first cut, and in the second cut, by the larger irrigation blade. The chlorophyll measurements showed an increasing linear behavior in relation to the fertilizer doses. The increase in water supply negatively influenced the chlorophyll measurements in both sections, and only quadratically, with a maximum point on the 50% ETC slide, in the first section. Of the growth measurements, only the number of leaves benefited from the increase of the irrigation slides. The highest levels of vitexin were obtained by applying the largest irrigation blade. The phosphorus content was positively influenced by the doses of natural phosphate, and the magnesium content was affected by the higher water replacements. Therefore, the irrigation slides influenced the biometric aspects, accumulation of phytomass and flavonoids in plants of P. incarnata L.
This study aimed to evaluate the influence of phosphate fertilization and the effect of four levels of irrigation on the yield of phytomass and the accumulation of flavonoids in Passiflora incarnata L. The experiment was conducted in a vegetation house in the department of Soil and Environmental Resources FCA/UNESP, in Botucatu. Four levels of irrigation based on the evaporation of the Class A Tank (50%, 75%, 100% and 125% of crop evapotranspiration) were used, in addition to five doses of Bayóvar® natural reactive phosphate (0, 500, 1000, 1500, 2000 mg dm-3), in 6 repetitions. Evaluations were performed in both sections of the crop, before harvesting, indicated by the opening of 50% of the flowers. The data obtained were: flavonoid index (IFLV) and chlorophyll index (ICHL) with Dualex Scientific®, vegetation index by normalized difference (NDVI) with GreenSeeker®, number of leaves (NF), height (ALT), stem diameter (DIAM), fresh biomass (FF) and dry biomass (FS). The dried whole material (leaves and stems) was directed to flavonoid and nutrient content analysis. The soil samples, at the end of the cycle, were sent for chemical analysis. The results were submitted to analysis of variance at 5% confidence, with regression analysis. It was found that the IFLV was positively influenced by the lower doses of phosphorus in the first cut, and in the second cut, by the larger irrigation blade. The chlorophyll measurements showed an increasing linear behavior in relation to the fertilizer doses. The increase in water supply negatively influenced the chlorophyll measurements in both sections, and only quadratically, with a maximum point on the 50% ETC slide, in the first section. Of the growth measurements, only the number of leaves benefited from the increase of the irrigation slides. The highest levels of vitexin were obtained by applying the largest irrigation blade. The phosphorus content was positively influenced by the doses of natural phosphate, and the magnesium content was affected by the higher water replacements. Therefore, the irrigation slides influenced the biometric aspects, accumulation of phytomass and flavonoids in plants of P. incarnata L.
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Agronomia, Fisiologia vegetal, Irrigação, Flavonoides, Agronomy, Plant physiology, Irrigation, Flavonoids