Gladiolus development in response to bulb treatment with different concentrations of humic acids

Baldotto, Marihus Altoé; Baldotto, Lílian Estrela Borges

doi:10.1590/s0034-737x2013000100020

Cited by 42 publications

(48 citation statements)

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“…Humic acids isolated from poultry litter and cattle manure were previously isolated and assessed by Baldotto et al (2012b) and Baldotto and Baldotto (2013). The experiment was completely randomized, with five repetitions and a total of 50 experimental units.…”

Section: Methodsmentioning

confidence: 99%

“…Among the technologies available for corn production, it is worth to mention the use of improved seeds in combination with the optimization of other factors affecting production, i.e., integrated nutrition management, plant protection, and irrigation. Recently developed technologies incorporate the use of plant growth regulators to stimulate plant metabolism and increase the efficiency of light, water and nutrients use (BALDOTTO et al, 2012a;BALDOTTO, 2013). However, the effect of this technology on corn yield has not been studied extensively.…”

Section: Introductionmentioning

confidence: 99%

“…Assessing the potential of humic acids isolated from different sources of organic matter on growth and development of plants of agricultural interest has been investigated in several studies carried out in Brazil and worldwide (BALDOTTO et al, 2009;BALDOTTO, 2013;FAÇANHA, 2004;CHEN et al, 2004;FAÇANHA et al, 2002).…”

Section: Introductionmentioning

confidence: 99%

“…The effect of these substances was reported to be analogous to auxins in stimulating and accelerating the growth of roots and aerial parts (BALDOTTO et al, 2012a;BALDOTTO, 2013). For most crops, greater response of plants to humic and fulvic acids occurs at concentrations between 10 and 20 mmol L -1 of C, which are used, for instance, for treatment of seeds, stem cuttings, and in post-planting sprays.…”

Section: Introductionmentioning

confidence: 99%

“…For most crops, greater response of plants to humic and fulvic acids occurs at concentrations between 10 and 20 mmol L -1 of C, which are used, for instance, for treatment of seeds, stem cuttings, and in post-planting sprays. At higher concentrations, the effect stabilizes and tends to decrease, sometimes being even detrimental when compared to no applications (BALDOTTO et al, 2009;BALDOTTO et al, 2012a;BALDOTTO, 2013;CANELLAS et al, 2006;SILVA et al, 2011). Nardi (2002 and Baldotto (2011) reviewed about the effects of humic substances on diferent plants.…”

Section: Introductionmentioning

confidence: 99%

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Corn initial vigor in response to humic acids from bovine manure and poultry litter

Melo

Baldotto

2015

Sem. Ci. Agr.

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Corn is grown throughout the country, with its yields varying according to the technology investment. Among the technologies that seek to optimize productivity, the focus is on the use of improved seeds, which is associated with the properly integrated management of production factors such as pH adjustment and soil fertilization, irrigation, pest control and competitors, and more recently, the use of plant growth regulators. Analogous to synthetic growth regulators such as auxins, humic substances in organic matter have a stimulating effect on plants. However, the bioactivity and optimum concentration of humic substances vary with the type of plant and the type of raw materials used for their isolation. This work aimed to study the growth and development of maize in response to the treatment of seeds by different concentrations of humic acids. The treatments involved the application of two sources of humic acid (bovine manure and poultry litter) and five concentrations (0, 10, 20, 30, and 40 mmol L -1 of C) of humic acid solutions to seeds in a bioassay carried out in a greenhouse. At the end of the experiment (45 days after germination), plants were evaluated biometrically and nutritionally. The results showed a significant increase in the growth and development of shoots and roots, and there was a significant accumulation of N and P after the application of humic acid isolated from bovine manure. These effects did not occur with the application of humic acid isolated from poultry litter. Therefore, biostimulation by humic acids isolated from bovine manure showed positive results and was complementary as compared to the effects of other inputs commonly used in the treatment of maize seeds. Key words: Bioactivity, humic substances, soil chemistry and fertility, soil organic matter ResumoO milho é cultivado em todo o país, produzindo quantidades variáveis conforme o investimento em tecnologia. Dentre essas tecnologias, destaca-se o uso de sementes melhoradas, associadas com adequado manejo integrado dos fatores de produção, tais como a correção e fertilização dos solos, a irrigação, o controle fitossanitário e de competidores e, mais recentemente, o uso de biorreguladores, buscando otimizar a produtividade. De forma análoga aos reguladores de crescimento sintéticos, como as auxinas, as substâncias húmicas da matéria orgânica apresentam um efeito estimulante em plantas. Contudo, a bioatividade e a concentração ótima das substâncias húmicas variam de acordo com as espécies vegetais e com matérias primas das quais elas foram isoladas. Por essas razões, este trabalho teve como objetivo estudar o crescimento e desenvolvimento do milho, em resposta à aplicação de diferentes concentrações de ácidos húmicos, via tratamento de sementes. Os tratamentos constituíram-se de duas fontes de ácidos húmicos (esterco bovino e cama de aviário) utilizando cinco concentrações (0, 10, 20, 30 e 40 mmol L -1 de C) das respectivas soluções, aplicado via tratamentos de sementes em um bioensaio conduzido em casa de vegetação. Ao fi...

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%