Regulador De Crescimento Na Produtividade E Qualidade De Sementes De Aveia-Branca

Kaspary, Tiago Edu; Lamego, Fabiane Pinto; Bellé, Cristiano; Kulczynski, Stela Maris; Pittol, D.

doi:10.1590/s0100-83582015000400012

Cited by 13 publications

(18 citation statements)

References 18 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%

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%

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 oats, Guerreiro and Oliveira (2012) note that the use of trinexapac-ethyl causes reduction in plant height and negatively affects the grain yield. Result contrary to that obtained by Kaspary et al (2015) who claim that the P(cx²)= parameter that measures the slope of the line; R²= determination coefficient; * = Significant at 5% error probability by t test. ; ̅ = average obtained in the three years of study; ̅ = overall average; YE = estimated value; Optimal dose = dose regulator that allows maximum lodging of 5%.…”

Section: N-coverage (Kg Hacontrasting

confidence: 73%

“…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%

“…In crotalaria (Kappes et al, 2011) and soybean (Souza et al, 2013) the efficient reduction of the lodging was obtained with the dose application of 500 mL ha -1 of regulator. Kaspary et al (2015) and Guerreiro and Oliveira (2012), studying the growth regulator effects on grain yield and quality of oat seeds, claim that the dose of 500 mL ha -1 reduced the plant height by 60% and, consequently, altering the expression of plants lodging.…”

Section: Resultsmentioning

confidence: 99%

“…To minimize the lodging occurrence, there have been evaluated the use of growth regulators, as trinexapac-ethyl in crops such as soybeans (Souza et al, 2013), rice (Arf et al, 2012), wheat (Schwerz et al, 2015) and crotalaria (Kappes et al, 2011). The trinexapac-ethyl acts by reducing cell elongation in the vegetative stage and obstructing the gibberellic acid biosynthesis, plant hormone responsible for growth (Heckman et al, 2002;Kaspary et al, 2015). The growth regulators have been used to make the plants architecture more adapted and efficient at the use of natural resources and agricultural inputs, and to ensure high yield with quality (Souza et al, 2013;Hawerroth et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

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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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Nitrogen and trinexapac-ethyl effects on wheat grain yield, lodging and seed physiological quality in southern Brazil

Faria¹,

Silva

Lollato

2022

Ex. Agric.

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Summary Nitrogen (N) fertilization affects wheat yield and grain protein concentration; however, its mismanagement can increase plant lodging. While the use of plant growth regulators such as trinexapac-ethyl (TE) can mitigate plant lodging, their effects on seed physiological quality are not well known. The aim of this study was to evaluate the effects of N fertilization and TE on wheat yield, lodging and seed quality of spring wheat varieties. It was carried out in the 2018 growing season in the environments of Londrina and Ponta Grossa, Brazil. A randomized complete block design was used with a 2 × 3 × 3 factorial arrangement to evaluate two wheat genotypes (WT 15008 and WT 15025), three top-dressing N rates (0, 40 and 120 kg ha−1), and three TE rates (0, 50 and 100 g ha−1). Agronomic characteristics related to wheat productivity (hectolitre weight, thousand-grain weight, density of fertile spikes, plant height, lodging and grain yield) and seed physiological quality (seed germination and vigour; length and dry matter of normal seedlings) were evaluated. Increasing N rates up to 120 kg ha−1 increased plant lodging up to 26.4 percentage points for WT 15025 in Londrina. TE impaired some traits of seed physiological quality. Spraying 100 g ha−1 TE on the plants reduced seedling length by 9.4% in the seeds of WT 15008 harvested in Ponta Grossa compared to the TE control (0 g ha−1). The dry matter of the seedlings from the seeds harvested in Londrina declined by 7.2% due to the application of 100 g ha−1 TE, compared to the control. However, a lower rate of TE (50 g ha−1) might be enough to minimize plant lodging without impairing the physiological quality of the seeds, depending on the rate of N fertilization. This study is the first step in providing empirical evidence for the detrimental effects of TE in combination with N on wheat seed quality, suggesting that seed producers should exercise caution in managing TE and N fertilization.

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Regulador De Crescimento Na Produtividade E Qualidade De Sementes De Aveia-Branca

Cited by 13 publications

References 18 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

Nitrogen and trinexapac-ethyl effects on wheat grain yield, lodging and seed physiological quality in southern Brazil

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