Powered by OpenAIRE graph
Found an issue? Give us feedback
image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ LAReferencia - Red F...arrow_drop_down
image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
versions View all 1 versions
addClaim

Reguladores vegetais e micronutrientes em plantas de tomateiro

Authors: Chaves, Prínscilla Pâmela Nunes;

Reguladores vegetais e micronutrientes em plantas de tomateiro

Abstract

O objetivo do trabalho foi avaliar os efeitos fisiológicos, bioquímicos e produtivos em plantas de tomateiro, além dos atributos de qualidade de frutos com a aplicação foliar da mistura de micronutrientes e reguladores vegetais em diferentes doses e períodos de desenvolvimento da cultura em condições de cultivo protegido. Para isso foram instalados dois experimentos independentes, em delineamento de blocos ao acaso com oito tratamentos e três repetições. O material genético utilizado foi o híbrido Santy e os tratamentos utilizados foram: T1- Controle; T2 - IBA + GA3 + Kt - 0,5 L ha-1; T3 (Co + Mo - 0,5 L ha-1) + (IBA + GA3 + Kt - 0,5 L ha-1); T4 - (Co + Mo - 1 L ha-1) + (IBA + GA3 + Kt - 0,5 L ha-1); T5 (Co + Mo - 2 L ha-1) + (IBA + GA3 + Kt - 0,5 L ha-1); T6 (Co + Mo - 0,5 L ha-1) + (IBA + GA3 + Kt - 0,5 L ha-1); T7 - (Co + Mo - 1 L ha-1) + (IBA + GA3 + Kt - 0,5 L ha-1) e T8 (Co + Mo - 2 L ha-1) + (IBA + GA3 + Kt - 0,5 L ha-1). As aplicações dos tratamentos 3, 4 e 5 iniciaram-se no florescimento e cessaram na primeira colheita dos frutos, enquanto os tratamentos 2, 6, 7 e 8 as aplicações tiveram início no florescimento e transcorreram até a última colheita, com intervalos de 14 dias entre as aplicações. No capítulo 1 foram determinadas atividade enzimática antioxidativa, peroxidação lipídica, peróxido de hidrogênio, medidas de trocas gasosas, fluorescência da clorofila a e parâmetros de produtividade: produção total, comercial e não comercial, massa média de frutos comerciais, número de frutos totais, comercial e não comercial e o percentual de ganhos e perdas em produção. No capítulo 2 foram quantificados os teores de sólidos solúveis, pH, acidez titulável, índice de maturação, perda de massa e carboidratos. Nos dois experimentos, a enzima superóxido dismutase, o teor de peróxido de hidrogênio, concentração interna de CO2 e a taxa aparente de transporte de elétrons foram as variáveis de maior influência na produtividade. As plantas tratadas apenas com os reguladores vegetais pulverizados seis vezes durante o ciclo da cultura (IBA + GA3 + Kt - 0,5 L ha-1) e com a mistura desses compostos com a maior dose dos micronutrientes com três aplicações [(Co + Mo - 2 L ha-1) + (IBA + GA3 + Kt - 0,5 L ha-1)] foram os tratamentos que apresentaram as melhores respostas produtivas nos dois anos de cultivo. O tratamento com a combinação de Co + Mo na dose de 2 L ha-1 com IBA + GA3 + Kt na dosagem de 0,5 L ha-1 com três pulverizações apresentou menor índice de maturação e perda de massa durante o armazenamento dos frutos nos dois experimentos.

The objective of this research was to evaluate the physiological, biochemical and productive effects on tomato crop. Moreover, it was study fruit quality attributes with the foliar application of the mixture of micronutrients and crop regulators in different doses and periods of development under protected conditions. . For this, two independent experiments were installed, in a randomized block design with eight treatments and three replications. The genetic material used was the hybrid Santy and the treatments used were: T1- Control; T2 - IBA + GA3 + Kt - 0.5 L ha-1; T3 (Co + Mo - 0.5 L ha-1) + (IBA + GA3 + Kt - 0.5 L ha-1); T4 - (Co + Mo - 1 L ha-1) + (IBA + GA3 + Kt - 0.5 L ha-1); T5 (Co + Mo - 2 L ha-1) + (IBA + GA3 + Kt - 0.5 L ha-1); T6 (Co + Mo - 0.5 L ha-1) + (IBA + GA3 + Kt - 0.5 L ha-1); T7 - (Co + Mo - 1 L ha-1) + (IBA + GA3 + Kt - 0.5 L ha-1) and T8 (Co + Mo - 2 L ha-1) + (IBA + GA3 + Kt - 0.5 L ha-1). In treatments 3, 4 and 5, the applications started at flowering and stopped at the first harvest of fruits, while treatments 2, 6, 7 and 8 the applications started at flowering and it gone until the last harvest, with intervals of 14 days between applications. In the first chapter, they were determined antioxidative enzyme activity, lipid peroxidation, hydrogen peroxide, gas exchange measures, chlorophyll fluorescence and productivity parameters, total, commercial and non-commercial production, average mass of commercial fruits, number of total fruits, commercial and non-commercial and the percentage of gains and losses in production. In the second chapter, they were quantified the contents of soluble solids, pH, titratable acidity, maturation index, weight loss and carbohydrates were quantified. In both experiments, the superoxide dismutase enzym e, the hydrogen peroxide content, internal CO2 concentration and the apparent electron transport rate were the variables with the greatest influence on productivity. Plants treated only with crop regulators sprayed six times during the crop cycle (IBA + GA3 + Kt - 0.5 L ha-1) and with the mixture of these compounds with the highest dose of micronutrients with three applications [(Co + Mo - 2 L ha-1) + (IBA + GA3 + Kt - 0.5 L ha-1)] were the treatments that showed the best productive responses in the two years of cultivation. The treatment with combination of Co + Mo in dose of 2 L ha-1, IBA + GA3 + Kt in dose of 0,5 L ha-1, sprayed three times showed a lower rate of maturation and loss of mass during storage of fruits in both experiments.

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Pós-graduação em Agronomia (Horticultura) - FCA

149933/2016-9

Country
Brazil
Keywords

Bioquímica, Técnicas de manejo, Post-harvest, Plant physiology, Management techniques, Solanum lycopersicum L., Biochemistry, Produtividade, Pós-colheita, Fisiologia vegetal, Solanum lycopersicum L

  • BIP!
    Impact byBIP!
    selected citations
    These citations are derived from selected sources.
    This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    0
    popularity
    This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
    Average
    influence
    This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    Average
    impulse
    This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
    Average
Powered by OpenAIRE graph
Found an issue? Give us feedback
selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
Green