Growth retardant and nitrogen levels in wheat agronomic characteristics

Schwerz, Felipe; Caron, Bráulio Otomar; Schmidt, Denise; Oliveira, Douglas Machado de; Elli, Elvis Felipe; Eloy, Élder; Rockenbach, Ana Paula

doi:10.15361/1984-5529.2015v43n2p93-100

Cited by 17 publications

(13 citation statements)

References 14 publications

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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%

“…The lodging affects the morphological structure of the plant and the earlier it occurs, the greater the reduction in yield and grain quality (Trevizan et al, 2015). 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).…”

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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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

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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“…Among the main agents that promote the plant lodging, the wind and rain stand out (Easson et al, 1993;Silva et al, 2006). In favoring conditions to lodging, the use of plant growth regulator has been used as an efficient solution, including allowing the use of higher sowing densities and larger doses of nitrogen in increasing yield (Matysiak, 2006;Schwerz et al, 2015). Rademacher (2000) defines plant growth regulator as a synthetic compound capable of reducing undesirable longitudinal growth of the aerial part of plants, with no decrease in grain yield.…”

Section: Resultsmentioning

confidence: 99%

The management of sowing density on yield and lodging in the main oat biotype grown in Brazil

Romitti¹,

Silva²,

Marolli³

et al. 2016

Afr. J. Agric. Res.

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The sowing density management in the main oat biotype cultivated in Brazil can bring yield gains with reduced lodging. The aim of this study was to sow the density adjustment of early cycle oat cultivars and reduced stature to increase biomass and grain yield with reduced lodging, considering high and low N-residual release succession systems in different years. The study was carried out in 2011, 2012 and 2013 in randomized blocks experimental design with four replications in factorial scheme 4 × 2, for sowing density (100, 300, 600 and 900 seeds m -2 ) and oat cultivars (Brisasul and URS Taura) in the corn/oat and soybean/oat succession systems. In each succession system two experiments were conducted, one to quantify the biomass production rate, and the other, aimed at estimating the grain yield and lodging. Regardless of year and cultivar, the main oat biotype grown in Southern Brazil evidences optimal sowing density around 500 seeds m -2 in the biomass and grain expression yield in the corn/oat and soybean/oat succession systems. In the soybean/oat succession system, the use of optimal density can favor the plant lodging, especially in favorable cultivation years. The corn/oat succession system through lower release of N-residual proves to be efficient concerning the grain yield expression and reduced lodging in the use of adjusted density.

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“…An alternative used in cereals such as rice [9], wheat [10] and oats [6], is the use of growth regulators, which are chemical compounds that make stem more resistant to breaking and lodging without decreasing grain productivity [11].…”

Section: Introductionmentioning

confidence: 99%

A Proposal of Oat Productivity Simulation by Meteorological Elements, Growth Regulator and Nitrogen

Marolli¹,

Silva²,

Scremin³

et al. 2017

AJPS

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The simulation of oat grain productivity does not contemplate the use of efficient models that involve important management with meteorological elements. The objective of the study is to propose a mathematical model capable of simulating the oat grain productivity through the management of nitrogen and growth regulator with variables related to the plant and to meteorological elements. In this study, two experiments were conducted in the years of 2013, 2014 and 2015: one to quantify biomass productivity and another to determine grain productivity and lodging at the management doses of nitrogen and growth regulator. The experimental design was a randomized block with four replications in a 4 × 3 factorial scheme for 0, 200, 400 and 600 mL•ha −1 growth regulator doses and 30, 90 and 150 kg•ha −1 nitrogen doses, respectively. During the crop cycles, the meteorological variables thermal sum, radiation and rainfall were quantified. The mathematical model proposed, which combines polynomial regression of the harvest index with multiple linear regression of the biological productivity, is efficient in the simulation of oat grains productivity with the use of growth regulator, nitrogen and meteorological elements. Thus, it adds to the conventional models of simulation and becomes an aid tool for making decisions regarding the management of oats culture.

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Growth retardant and nitrogen levels in wheat agronomic characteristics

Cited by 17 publications

References 14 publications

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

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

The management of sowing density on yield and lodging in the main oat biotype grown in Brazil

A Proposal of Oat Productivity Simulation by Meteorological Elements, Growth Regulator and Nitrogen

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