Regulador de crescimento em plantas de trigo: reflexos sobre o desenvolvimento vegetativo, rendimento e qualidade de grãos

Chavarria, Geraldo; Rosa, Willian Pelisser da; Hoffmann, Laércio L.; Durigon, Miria Rosa

doi:10.1590/0034-737x201562060011

Cited by 14 publications

(13 citation statements)

References 11 publications

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“…This behavior complies with the present work hypothesis, which states that the growth regulator effect on maize plant height is more pronounced in late sowing dates. The reduction of maize plant height with the use of Trinexapac-ethyl was also reported by Fagherazzi (2015), Pricinotto et al (2015) and Durli (2016) and in other species of the Poaceae family, such as wheat (Grijalva-Contreras et al, 2012;Marco Junior et al, 2013;Chavarria et al, 2015), rice (Arf et al, 2012;Alvarez et al, 2014) and white oat (Kaspary et al, 2015).…”

Section: Resultssupporting

confidence: 52%

“…These results confirmed data collected by Durli (2016), who also noticed reduction of this variable with the application of Trinexapacethyl. Therefore, in maize the larger effect of this growth regulator occurs in the upper stem internodes whereas in winter cereals, such as wheat and barley, its restrictive effect is concentrated on the internodes located at the lower part of the stem (Espindula et al, 2010;Chavarria et al, 2015). Such differences in the place where Trinexapac-ethyl acts may be related to growth stage and the number of times the product is applied.…”

Section: Resultsmentioning

confidence: 99%

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Growth regulator and maize response to the increase in plant density

Leolato

Sangoi

Durli

et al. 2017

Pesq. agropec. bras.

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-The objective of this work was to evaluate the effect of application of the growth regulator Trinexapac-ethyl on maize response to the increase in plant density at two sowing dates. A field experiment was carried out in the municipality of Lages, state of Santa Catarina, Brazil, during the 2014/2015 and 2015/2016 growing seasons. Two sowing dates (10/15 -preferential, and 12/5 -late), four plant densities (5, 7, 9, and 11 plants m -2 ), with and without Trinexapac-ethyl application, were tested. The growth regulator was sprayed at a rate of 150 g a.i. ha -1 , when hybrid P30F53YH was at the V5 and V10 growth stages. The spraying of Trinexapac-ethyl decreased the stem length above the ear insertion node at both growing seasons. Grain yield ranged from 11,422 to 14,805 kg ha -1 , and increased in a quadratic way with the increment in plant density. The highest yields were reached when maize was sown in October. The spraying of Trinexapac-ethyl did not affect grain yield, but decreased the 1,000 kernels mass at both sowing dates. The use of Trinexapac-ethyl does not enhance grain yield of maize hybrid P30F53YH at crowded stands in response to the densification, regardless of sowing time.

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Section: Resultssupporting

confidence: 52%

Section: Resultsmentioning

confidence: 99%

Growth regulator and maize response to the increase in plant density

Leolato

Sangoi

Durli

et al. 2017

Pesq. agropec. bras.

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“…In generally, trend of reduction in the lodging was observed with increasing growth regulator dose, regardless of the year condition and Nfertilizer. Studies performed on wheat (Chavarria et al, 2015;Schwerz et al, 2015), rice (Arf et al, 2012), crotalaria (Kappes et al, 2011) and oats (Hawerroth et al, 2015;Kaspary et al, 2015) point out that regardless of N-fertilizer, the increasing of the growth regulator doses decreases the plant height and consequently the lodging. Hawerroth et al (2015) still claim that the regulator use is effective when administered in favorable oat cultivation years.…”

Section: Resultsmentioning

confidence: 99%

Contributive effect of growth regulator Trinexapac-Ethyl to oats yield in Brazil

Marolli¹,

Silva²,

Romitti³

et al. 2017

Afr. J. Agric. Res.

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Studies on efficient use of the plant growth regulator can make this technology possible for leveraging oat yield in Brazil. This study aims to define the optimal dose growth regulator in oat, which allows plant lodging at most 5%. Establishing equations describe the yield indicators behavior and by using the optimal growth regulator dose for lodging, simulate the expression of these indicators regardless of reduced, high and very high conditions of nitrogen fertilization and favorable and unfavorable cultivation year. The study was conducted in 2013, 2014 and 2015, in carrying out two experiments, one to quantify the biomass yield and another aiming at estimating grain yield and lodging. The experimental design was a randomized block with four replications, following factorial scheme 4 x 3 to growth regulator doses (0, 200, 400 and 600 mL ha ), respectively. The use of 495 mL ha -1 growth regulator trinexapac-ethyl active principle is shown efficient at the reduction of oat plant lodging, regardless of the agricultural year condition and N-fertilizer rate. In the expression of grain yield and harvest index, quadratic behavior is obtained, however with decreasing linearity on the biomass yield and straw by increasing the growth regulator dose. The optimal dose of growth regulator in reducing oat lodging does not affect grain yield, but it reduces biological yield via biomass straw with elevation on the harvest index.

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“…A ocorrência de folhas superiores mais eretas e folhas inferiores arranjadas horizontalmente melhora a interceptação da radiação solar pelo dossel de plantas, o que aumenta seu aproveitamento (LONG et al 2006). 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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Regulador de crescimento em plantas de trigo: reflexos sobre o desenvolvimento vegetativo, rendimento e qualidade de grãos

Cited by 14 publications

References 11 publications

Growth regulator and maize response to the increase in plant density

Growth regulator and maize response to the increase in plant density

Contributive effect of growth regulator Trinexapac-Ethyl to oats yield in Brazil

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

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