Eficiência climática para as culturas da soja e do trigo no estado do Rio Grande do Sul em diferentes datas de semeadura

Battisti, Rafael; Sentelhas, Paulo César; Pilau, Felipe Gustavo; Wollmann, Cássio Arthur

doi:10.1590/s0103-84782013000300003

Cited by 35 publications

(27 citation statements)

References 7 publications

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“…Rainfall has been the main weather variable that affects agricultural productivity, although temperature, light and sunlight are also important (Battisti et al, 2013). Stress caused by lack or excess of water adversely affects the wheat and oats´ development (Benin et al, 2012;Mantai et al, 2015).…”

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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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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“…These facts justify the higher grain yield in 2015, compared with 2014. Rainfall is the main meteorological variable affecting the yield of agricultural crops (Battisti et al, 2013). The condition of cultivation year in wheat is predominantly defined by the distribution and volume of rains during the development (Arenhardt et al, 2015).…”

Section: Resultsmentioning

confidence: 99%

Nitrogen efficiency in wheat yield through the biopolymer hydrogel

Mamann

Silva

Scremin

et al. 2017

Rev. bras. eng. agríc. ambient.

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A B S T R A C TNitrogen use efficiency in wheat biomass and grain yields can be favored by the biopolymer hydrogel. The objective of the study was to analyze the use of the biopolymer hydrogel applied to the seed in the optimization of fertilizer-N on wheat biomass and grain yields, under different conditions of agricultural year and succession systems of high and reduced release of residual-N. In the study, two experiments were conducted, with different farming systems, soybean/wheat and maize/wheat, one to quantify the biomass yield rate and the other to determine grain yield. The experiments were conducted in the years 2014 and 2015, in a randomized block design with four replicates in a 4 x 4 factorial scheme, corresponding to hydrogel doses (0, 30, 60 and 120 kg ha ), applied as top-dressing. It is possible to improve the fertilizer-N efficiency by wheat using the biopolymer hydrogel for the production of biomass and grains. The highest wheat yield per kilogram of N supplied is obtained with 30 and 60 kg ha -1 of hydrogel, regardless of the year and succession system.Eficiência do nitrogênio na produtividade do trigo pelo biopolímero hidrogel ) aplicadas em cobertura, respectivamente, no sistema de sucessão soja/trigo e milho/trigo. É possível melhorar a eficiência de N-fertilizante pelo trigo com o uso do biopolímero hidrogel à produção de biomassa e grãos. A maior produtividade de trigo por quilograma de nitrogênio fornecido é obtida com 30 e 60 kg ha -1 de hidrogel, independente do ano e do sistema de sucessão. R E S U M O IntroductionWheat is one of the most produced cereals in the world (Arenhardt et al., 2015;Brezolin et al., 2017). Nitrogen (N) is essential to guarantee high yield of the wheat crop (Teixeira Filho et al., 2010;Prando et al., 2013), but is easily leached in rainy years (Teixeira Filho et al., 2010; Mantai et al., 2015) or volatilized in dry years (Rojas et al., 2012;Arenhardt et al., 2015). Thus, N use efficiency by wheat is eventually compromised, decreasing the yield and increasing the losses to the environment (Prando et al., 2013. Technologies that allow to improve yield with greater sustainability are necessary, especially in the increase of N use efficiency in the agricultural processes (Pinnow et al., 2013; Mantai et al., 2015).One of the ways to improve N absorption by plants is the maintenance of soil moisture, since the N supply depends, among other factors, on moisture, aeration and temperature, which interact in the cultivation systems (Rocha et al., 2008;Silva et al., 2015). The use of the biopolymer hydrogel may represent a technology to regulate soil water availability to crops, which would favor the efficiency of absorption of nutrients and improve the yield (Azevedo et al., 2008;Mendonça et al., 2013). Hydrogels are biodegradable threedimensional polymeric networks that retain water in their structure, forming a gel, which is capable of hydrating and releasing water over time (Kaewpirom & Boonsang, 2006;Venturoli & Venturoli, 2011).The objective of the study was t...

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“…It stands out that the established dose of N-Fertilizer exceeded the desired expectation of 3 t ha -1 characterizing 2013 as a favorable year (FY) for cultivation. Battisti et al (2013) asserted that the rainfall is the meteorological variable that mostly affects the productivity in relation to the temperature, sunshine and solar radiation. Arenhardt et al (2015) emphasized that the condition of the cultivation year of wheat is predominantly defined by distribution and volume of rainfall.…”

Section: Resultsmentioning

confidence: 99%

The sowing density on oat productivity indicators

Romitti¹,

Dornelles²,

Silva³

et al. 2017

Afr. J. Agric. Res.

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The sowing density adjustment in oatcan maximize the productivity expression.The aim of this study is to define the behavior of productivity expression of biomass, grains, straw andharvest indexthrough increasing sowing density in the main biotype cultivated in Southern Brazil. It proposesthe possibility of indicating higher sowing density to the productivity maximization of biomass and grains.With the densityadjusted to the grain productivity to simulate the reflexes on the biological and straw productivity and harvest index compared to recommendeddensity, considering high and reduced tillering cultivars in different succession systems.The study was carried out in 2013, 2014 and 2015 in randomized blockdesign with four replications in a 4 × 2 factorial scheme, for sowing density (100, 200, 300, 600 and 900 m -2 ) and oat cultivars (Brisasul and URS Taura), respectively, in the corn/oat and soybean/oat succession system.With the increase in sowing density, the biological and straw productivity evidence alinear behavior and the grain productivity and harvest index ofquadratic behavior, regardless of the cultivar,agricultural year and succession system. It is possible to indicate a higher sowing density to the biomass and grain productivity maximization with sowing density close to 500 seeds m -2 in the main succession systems.In high and reduced tillering cultivars, the adjusted density compared tothe recommended increasedthe biological and straw productivity, regardless of agricultural year and succession systems.

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Eficiência climática para as culturas da soja e do trigo no estado do Rio Grande do Sul em diferentes datas de semeadura

Abstract: Efi ciência climática para as culturas da soja e do trigo no estado do Rio Grande do Sul em diferentes datas de semeadura

Cited by 35 publications

References 7 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

Nitrogen efficiency in wheat yield through the biopolymer hydrogel

The sowing density on oat productivity indicators

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