Mudanças climáticas e seus possíveis impactos aos sistemas agrícolas no Sul do Brasil

Leite, João Guilherme Dal Belo; Federizzi, Luiz Carlos; Bergamaschi, Homero

doi:10.5039/agraria.v7i2a1239

Cited by 13 publications

(13 citation statements)

References 9 publications

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“…Pedro Júnior et al (2004) report that the duration of the cycle of coolseason cereals cultivated in South Brazil is mainly due to air temperature, which is more effective in the duration of the period from emergence to flowering. According to Leite et al (2012), the maximum temperature for oat development is 35 ºC and the minimum is 0 ºC, confirming the adequate climate condition obtained during the study (Figure 1). Gonçalves et al (2010) comment that the increase in rainfall leads to easier decomposition of soil cover, bringing benefits in the release of nutrients, especially residual N, for the use by plants in succession.…”

Section: Resultssupporting

confidence: 58%

“…Carvalho et al (2009) and Oliveira et al (2011) comment that the period from emergence to maturation of short-cycle oat has mean duration of 118 to 120 days, respectively. However, the thermal oscillations in the cultivation years and the photoperiod may modify the duration of the development of this species (Castro et al, 2012;Leite et al, 2012). Table 4 presents the coefficients of wheat development obtained by Streck et al (2003) and Alberto et al (2009) that best adjusted to the oat development stages, in the different combinations of temperature and days of simulated development.…”

Section: Resultsmentioning

confidence: 99%

“…Leite et al (2012) claim that the interannual variability of mean temperature influences the cycle of the crops, advancing or delaying the stages of their development. According to Alberto et al (2009), higher temperatures can accelerate plant development, advancing the data of occurrence of AN-MT.…”

Section: Resultsmentioning

confidence: 99%

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Simulation of oat development cycle by photoperiod and temperature

Mantai

Silva

Marolli

et al. 2017

Rev. bras. eng. agríc. ambient.

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A B S T R A C TThe simulation of oat development cycle can be used in the planning of agricultural practices. The aim of the study was to simulate and validate the duration of oat development cycle by photoperiod, temperature and coefficients of development of wheat for use in the WEStreck model, considering different doses of N-fertilizer and systems of succession of high and low C/N ratio. The study was conducted in 2015 in a randomized block design with four replicates in a 4 x 2 factorial scheme, corresponding to N rates (0, 30, 60 and 120 kg ha -1 ) and oat cultivars (Barbarasul and Brisasul), respectively, in the soybean/oat and maize/ oat systems. The duration of the stages from emergence to anthesis and from anthesis to maturation of oats was simulated in the WE-Streck model. The minimum, optimum and maximum temperatures that effectively simulate the oat development cycle were 4, 22 and 30 °C from emergence to anthesis and 15, 25 and 35 °C from anthesis to maturation, respectively. The intermediate-cycle oat development was efficiently simulated by the WEStreck model using coefficients developed for wheat, with vegetative and reproductive cycles estimated at 89 and 43 days, respectively. Simulação do ciclo de desenvolvimento da aveia por fotoperíodo e temperatura R E S U M OA simulação do ciclo de desenvolvimento da aveia pode ser utilizada no planejamento de práticas agrícolas. Objetivou-se simular e validar a duração do ciclo de desenvolvimento da aveia por intermédio de fotoperíodo, temperatura e coeficientes de desenvolvimento do trigo para uso no modelo WE-Streck, considerando diferentes doses de N-fertilizante e sistemas de sucessão de alta e reduzida relação C/N. O estudo foi conduzido em 2015, em delineamento de blocos casualizados com 4 repetições em esquema fatorial 4 x 2 para doses de nitrogênio (0, 30, 60 e 120 kg ha -1 ) e cultivares de aveia (Barbarasul e Brisasul), respectivamente, no sistema soja/aveia e milho/aveia. No modelo WE-Streck foi simulada a duração das fases emergência à antese e antese à maturação da aveia. As temperaturas mínima, ótima e máxima que simulam com eficiência o ciclo de desenvolvimento da aveia da emergência à antese, foram 4, 22 e 30 °C, respectivamente e da antese à maturação 15, 25 e 35 °C, respectivamente. A simulação do desenvolvimento da aveia de ciclo médio pelo modelo WE-Streck foi eficiente usando coeficientes desenvolvidos para o trigo, com ciclo vegetativo e reprodutivo estimado em 89 e 43 dias, respectivamente.

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Section: Resultssupporting

confidence: 58%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Simulation of oat development cycle by photoperiod and temperature

Mantai

Silva

Marolli

et al. 2017

Rev. bras. eng. agríc. ambient.

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“…The temperature acts as a catalyst for biological processes, which is why plants require a minimum and maximum temperature for normal physiological activities [23]. According [24], the maximum temperature for the development of the oat crop is 35˚C, and the minimum temperature is 0˚C.…”

Section: Resultsmentioning

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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“…Therefore, the high percentage of caryopsis, the high weight of hectoliter and the grain size have been increasingly required [6]- [8]. These characteristics are not always obtained due to climatic factors and the prevalence of fungal diseases [9] [10]. Among the diseases, leaf rust (Puccinia coronata C da.…”

Section: Introductionmentioning

confidence: 99%

Adaptability and Stability of Yield and Industrial Grain Quality with and without Fungicide in Brazilian Oat Cultivars

Silva¹,

Wohlenberg²,

Arenhardt³

et al. 2015

AJPS

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The use of productive cultivars with adaptability and stability and less demanding to fungicide use are critical to the sustainability of production factors. The objective of this work was to determine the per se performance of white oat cultivars and parameters of adaptability and stability on yield and grain quality in the proposition of cultivars more responsive in reducing the use fungicide. The study was conducted in Augusto Pestana, RS, Brazil, between the years 2010 and 2013. The experimental design was randomized blocks with six replicates, three with and three without fungicide. The study evaluated 14 white oat cultivars for yield and industrial capability. The white oat cultivars FAEM 4 Carlasul and URS Corona indicate high grain yield with stability and general adaptability, independent of chemical control. The cultivar URS Corona shows together high yield and thousand grain weight and hectoliter with general adaptability and stability in the absence of fungicide. Although no stability has been detected in industrial yield without the use of fungicides, cultivars of URS Charrua, URS Corona and URS Taura show high means with general adaptability.

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Mudanças climáticas e seus possíveis impactos aos sistemas agrícolas no Sul do Brasil

Cited by 13 publications

References 9 publications

Simulation of oat development cycle by photoperiod and temperature

Simulation of oat development cycle by photoperiod and temperature

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

Adaptability and Stability of Yield and Industrial Grain Quality with and without Fungicide in Brazilian Oat Cultivars

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