Efeito de regulador de crescimento na cultura de trigo submetido a diferentes doses de nitrogênio e densidades de plantas

Zagonel, Jeferson; Venâncio, W. S.; Kunz, Reni Pedro

doi:10.1590/s0100-83582002000300019

Cited by 28 publications

(37 citation statements)

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“…A similar trend was found with ethephon and chlormequat chloride (Espindula et al, 2009). The trinexapac-ethyl had longer persistence in inhibiting gibberellin biosynthesis to decrease dry matter production and internode length (Zagonel et al, 2002), and the Chlormequat reduced the amount of active gibberellin (Bode & Wild, 1984). In the present study, the data clearly demonstrated that the crop height was significantly reduced, which was consistent with previous studies (Cailong et al, 2017).…”

Section: Journal Of Agricultural Sciencesupporting

confidence: 91%

Effect of Selected Plant Growth Regulators on Yield and Stem Height of Spring Wheat in Ontario

Zhang¹,

Su²,

Tabori³

et al. 2017

JAS

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Lodging is an important limiting factor in wheat because it affects growth, yield and grain quality. Plant growth regulators (PGRs) are often used to restrain elongation of internodes, improve lodging traits, and protect yield potentials. An experiment was set up in the greenhouse at the Ottawa Research and Development Centre (ORDC) to study the effect of the selected PGRs (Manipulator, the active ingredient of which is chlormequat; and Palisade, the active ingredient of which is trinexapac-ethyl) on yield, stem height and morphological traits in six spring wheat cultivars (AC Carberry, AAC Scotia, Hoffman, Fuzion, FL62R1, and AW725). Both PGRs reduced plant height and caused a 6% to 48% reduction in the length of the second basal internode. The mixture of the two PGRs had a synergistic affect and made the stem shorter. The application of PGRs significantly reduced lodging, increased stem diameter, thickness, filling degree, and stem strength, and increased leaf relative chlorophyll content. However, application of PGRs significantly reduced grain yield, and the combination of the two PGRs (Manipulator and Palisade) had a synergistic effect and lowered the yield. In general, the effect of Palisade was more evident than that of Manipulator.

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Section: Journal Of Agricultural Sciencesupporting

confidence: 91%

Effect of Selected Plant Growth Regulators on Yield and Stem Height of Spring Wheat in Ontario

Zhang¹,

Su²,

Tabori³

et al. 2017

JAS

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“…Reduction in SDM was also found for wheat 'IAPAR-53' treated with 125g ha -1 trinexapac-ethyl compared with nontreated plants (ZAGONEL et al, 2002). On the other hand, linear increases in dry weight at higher N rates are related to the lodging reduction promoted by the increase in trinexapac-ethyl rates.…”

Section: Resultsmentioning

confidence: 67%

“…The increase in plant height provided by nitrogen is counterbalanced by the use of the retardant, and the combination of these factors is a strategy to avoid lodging and to achieve higher yields (ZAGONEL et al, 2002). It is necessary however to establish the adequate rates of nitrogen and trinexapacethyl for each cultivar and crop system, because height and architecture as well as physiological answer of wheat cultivars are different.…”

Section: Introductionmentioning

confidence: 99%

Rates of nitrogen and growth retardant trinexapac-ethyl on wheat

et al. 2011

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The objective in this study was to evaluate the effects of nitrogen rates in association with rates of the growth retardant trinexapac-ethyl on wheat. The experiment was conducted in Viçosa, MG and arranged in a 5×4 factorial, randomized block design, with four repetitions. A combination of five nitrogen rates (30, 60, 90, 120 and 150kg ha -1 ) with four rates of trinexapac-ethyl (0, 62.5, 125 and 187.5g ha -1

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“…A redução no crescimento vegetativo de plantas de cultivares de trigo também foi observada por ZAGONEL et al (2002), BERTI et al (2007, ZAGONEL & FERNANDES (2007) e CHAVARRIA et al (2015, sem haver interação entre cultivares e doses, semelhante ao apresentado no presente estudo. A redução da altura de plantas em resposta à aplicação de Etil-trinexapac esteve associada à redução do comprimento dos entrenós do colmo (Tabela 4), sendo que o regulador também afetou o crescimento da bainha da folha bandeira, o que reduziu, assim, a distância entre fonte e dreno.…”

Section: Resultsunclassified

“…Mudanças na morfologia foliar, em termos de espessura e disposição de células, por sua vez, podem resultar em aumento na eficiência fotossintética por unidade de área ou mesmo no controle das trocas gasosas, com efeito direto sobre a fotossíntese e o consumo de água (RICHARDS 2000, THOLEN et al 2012, SONG et al 2013 Reguladores vegetais do grupo dos inibidores da giberelina provocam, entre outros efeitos, a redução do porte (BERTI et al 2007, ZAGONEL & FERNANDES 2007, FIOREZE & RODRIGUES 2014a) e melhorias na arquitetura de plantas (SOUZA & ROSOLEM 2007, FIALHO et al 2009, FIOREZE & RODRIGUES 2014a, CHAVARRIA et al 2015. A redução na altura de plantas tem como benefícios a redução no acamamento, normalmente associados ao uso de maiores doses de nitrogênio e altas densidades de semeadura (ZAGONEL et al 2002).…”

Section: Introductionunclassified

Consumo de água e eficiência produtiva de plantas de trigo tratadas com Etil-trinexapac

Turek

Michelon

Tochetto

et al. 2018

Rev. Ciên. Agrovet.

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RESUMOO uso eficiente de recursos do ambiente de cultivo, o qual é influenciado por características da planta, é de grande importância para a adaptação de culturas em sistemas de produção. O presente trabalho teve como objetivo estudar o consumo de água e a eficiência produtiva de plantas de trigo tratadas com Etiltrinexapac. Foram conduzidos dois experimentos, em cultivo protegido, entre 2014 e 2015. Utilizou-se o delineamento experimental de blocos casualizados, em esquema fatorial 2x3, com quatro repetições. Dois cultivares de trigo, foram submetidos à aplicação de três doses de Etil-trinexapac (0, 125 e 188 g ha -1 de i.a.) na fase de alongamento do colmo principal. Foram avaliados: consumo de água, altura da planta e distância fonte e dreno, e os parâmetros morfológicos da folha bandeira. Ao final do ciclo da cultura, foram avaliados componentes de produção, produção de grãos e índice de colheita da cultura. A aplicação de Etil-trinexapac reduziu o crescimento de plantas de trigo, sem afetar a produção de grãos. A aplicação do regulador não reduz o consumo de água, tampouco o índice de colheita da cultura do trigo. PALAVRAS-CHAVE: Triticum aestivum L., regulador vegetal, arquitetura de planta, eficiência do uso da água, índice de colheita. ABSTRACTEfficient use of the resources of the growing environment, which is affected by plant traits, is very important for crop adaptation on production system. This work aimed to study the water consumption and yield efficiency of wheat plants treated with Trinexapac-ethyl. Two experiments were carried out, in greenhouse conditions, between 2014 and 2015. Experiments were arranged in randomized blocks design in a factorial 2x3, with four replicates. Two wheat cultivars were sprayed with three Trinexapac-ethyl doses (0, 125 and 188 g a.i. ha -1 ), at main culm elongation stage. The water consumption, plant height, sourcesink distance and the morphological parameters of the flag leaf were evaluated. At the end of the growing cycle, yield and yield components were determined, as well as harvest index. Trinexapac-ethyl reduced plant growth, without affecting grain production. Plant growth regulator application does not reduce either water consumption or wheat crop harvest index. KEYWORDS: Triticum aestivum L., plant growth regulators, plant architecture, water use efficiency, harvest index. INTRODUÇÃOElevados níveis de produção na cultura do trigo estão associados ao bom suprimento de água e nutrientes, recursos que devem ser utilizados de forma eficaz pela planta para potencializar o metabolismo e reduzir perdas. Melhorias na eficiência de uso de recursos, como água e nutrientes, podem estar associadas a características da planta, como arquitetura de raízes e de parte aérea (WANG & LI 2008, YANG & HWA 2008, CAI et al. 2016.A arquitetura de uma planta é determinada pela natureza e pelo arranjo de cada um dos seus componentes como resultado do equilíbrio entre o potencial genético e os fatores limitantes impostos pelo ambiente externo (MAITI & RODRÍGUEZ 2010). Fatores endóge...

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Efeito de regulador de crescimento na cultura de trigo submetido a diferentes doses de nitrogênio e densidades de plantas

Cited by 28 publications

References 1 publication

Effect of Selected Plant Growth Regulators on Yield and Stem Height of Spring Wheat in Ontario

Effect of Selected Plant Growth Regulators on Yield and Stem Height of Spring Wheat in Ontario

Rates of nitrogen and growth retardant trinexapac-ethyl on wheat

Consumo de água e eficiência produtiva de plantas de trigo tratadas com Etil-trinexapac

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