Efeitos da aplicação de bioestimulantes no crescimento e desenvolvimento iniciais da cana-de-açúcar
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Data
2023-05-19
Autores
Peloso, Renata Maria Froio
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Universidade Estadual Paulista (Unesp)
Resumo
O uso de bioestimulantes assume o papel de complemento na manutenção fisiológica da cana-de-açúcar, o que pode ser uma importante ferramenta em condições ambientais adversas. Mediante a composição, concentração e proporção, os bioestimulantes são capazes de promover ganhos em termos de crescimento e desenvolvimento vegetal. Nesse sentido, a realização de estudos adicionais torna-se uma estratégia para a determinação de concentrações mais eficientes e de formas mais adequadas à aplicação, com o objetivo de se obter melhores resultados em termos de produtividade. Dessa forma, o presente trabalho teve por objetivo compreender os efeitos da aplicação de bioestimulantes no crescimento e desenvolvimento iniciais da cana-de-açúcar, quando cultivada em Casa de Vegetação. O delineamento experimental adotado foi em Blocos Casualizados (DBC), sendo 10 (dez) tratamentos, e cinco repetições, totalizando 50 parcelas ou unidades experimentais. A composição dos bioestimulantes utilizados foram: complexo hormonal, aminoácidos, ácido 5- sulfosalicílico, etilenodiaminotetracetico e sal do ácido salicílico, assim como doses de outros compostos similares com a mesma finalidade. No trabalho foram avaliados dados referentes a velocidade de emergência (VE) e índice de velocidade de emergência (IVE), parâmetros biométricos de crescimento, produtivos de massas de matérias secas, parâmetros morfológicos e fisiológicos. Os resultados foram submetidos à análise de variância pelo teste F (p0,05), assim como análises de regressão e correlações pertinentes. A aplicação de bioestimulantes proporcionou incremento em relação a determinadas características avaliadas, como altura de plantas, número de colmos, diâmetro de colmos, espessura do limbo, e melhorou os resultados em relação a alguns dos parâmetros fisiológicos das plantas, como a obtenção de menor taxa de transpiração e menor Índice de murcha em condição de restrição hídrica, além da obtenção de obtenção de maior massa seca de raiz.
The use of biostimulants plays a complementary role in the physiological maintenance of sugarcane, which can be an important tool in adverse environmental conditions. Through composition, concentration and proportion, biostimulants are capable of promoting gains in terms of plant growth and development. In this sense, carrying out additional studies becomes a strategy for determining more efficient concentrations and more appropriate forms for application, with the aim of obtaining better results in terms of productivity. Thus, the present work aimed to understand the effects of the application of biostimulants on the initial growth and development of sugarcane, when cultivated in a greenhouse. The experimental design adopted was in Randomized Blocks (DBC), with 10 (ten) treatments, and five replications, totaling 50 plots or experimental units. The composition of the biostimulants used were: hormone complex, amino acids, 5-sulfosalicylic acid, ethylenediaminetetraacetic acid and salicylic acid salt, as well as doses of other similar compounds with the same purpose. In the work, data regarding emergence velocity (VE) and emergence velocity index (IVE), biometric parameters of growth, productive mass of dry matter, morphological and physiological parameters were evaluated. The results were submitted to analysis of variance by F test (p0.05), as well as regression analyzes and relevant correlations. The application of biostimulants provided an increase in relation to certain evaluated characteristics, such as plant height, number of stems, stem diameter, blade thickness, and improved the results in relation to some of the physiological parameters of the plants, such as obtaining a lower rate of transpiration and less wilting index in condition of hydric restriction, in addition to obtaining a greater yield of greater root dry mass.
The use of biostimulants plays a complementary role in the physiological maintenance of sugarcane, which can be an important tool in adverse environmental conditions. Through composition, concentration and proportion, biostimulants are capable of promoting gains in terms of plant growth and development. In this sense, carrying out additional studies becomes a strategy for determining more efficient concentrations and more appropriate forms for application, with the aim of obtaining better results in terms of productivity. Thus, the present work aimed to understand the effects of the application of biostimulants on the initial growth and development of sugarcane, when cultivated in a greenhouse. The experimental design adopted was in Randomized Blocks (DBC), with 10 (ten) treatments, and five replications, totaling 50 plots or experimental units. The composition of the biostimulants used were: hormone complex, amino acids, 5-sulfosalicylic acid, ethylenediaminetetraacetic acid and salicylic acid salt, as well as doses of other similar compounds with the same purpose. In the work, data regarding emergence velocity (VE) and emergence velocity index (IVE), biometric parameters of growth, productive mass of dry matter, morphological and physiological parameters were evaluated. The results were submitted to analysis of variance by F test (p0.05), as well as regression analyzes and relevant correlations. The application of biostimulants provided an increase in relation to certain evaluated characteristics, such as plant height, number of stems, stem diameter, blade thickness, and improved the results in relation to some of the physiological parameters of the plants, such as obtaining a lower rate of transpiration and less wilting index in condition of hydric restriction, in addition to obtaining a greater yield of greater root dry mass.
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Palavras-chave
Auxina, Giberelina, Citocinina, Taxa fotossintética, Auxin, Gibberellin, Cytokinin, Photosynthetic rate