Simulation of wheat yield by nitrogen and nonlinearity of environmental conditions

Trautmann, Ana P. B.; Silva, José Antônio Gonzalez da; Binelo, Manuel Osório; Valdiero, Antonio Carlos; Henrichsen, Luana; Basso, Natiane Carolina Ferrari

doi:10.1590/1807-1929/agriambi.v24n1p44-51

Cited by 7 publications

(7 citation statements)

References 24 publications

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“…White oats are a highly adaptable species; however, the occurrence of leaf diseases and meteorological restrictions are limiting the expression of the maximum crop yield (Silva et al, 2016). Among the meteorological factors, temperature and rainfall maximized the yield and quality of oat grains the most, as the environmental conditions improved (Klink et al, 2014;Trautmann et al, 2020). In oats, a favorable environment is characterized by rainfall with small volumes Rev.…”

Section: Resultsmentioning

confidence: 99%

Technical and agronomic efficiency of nitrogen use on the yield and quality of oat grains

Mantai

Silva

Carbonera

et al. 2021

Rev. bras. eng. agríc. ambient.

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The efficiency of nitrogen use by oats in association with climatic conditions is fundamental to the development of more sustainable managements with yield and quality. The objectives of this study were to define the agronomic efficiency of nitrogen by the ratio of the dose provided and product obtained, estimate the maximum technical efficiency of the nutrient on grain yield; and for the optimum dose, simulate the expression of the straw and industry yields, protein and total fiber in different conditions of the agricultural year in a soybean/oat system. The study was conducted from 2011 to 2016, in Augusto Pestana, RS, Brazil, in a randomized block design with four repetitions in a 4 x 2 factorial referring to nitrogen doses (0, 30, 60 and 120 kg ha-1) and oat cultivars (Barbarasul and Brisasul) in a soybean/oat system. Nitrogen increased grain, straw, and industry yields and total grain protein, with agronomic efficiency of 7.8, 19.7 and 3.3 kg ha-1 and 0.10 g kg-1, respectively, with reduction of the total fiber in 0.05 g kg-1 per kg of N supplied. The dose of maximum technical efficiency in the expression of grain yield is dependent on the weather conditions during cultivation. In general, the maximum efficiency of grain productivity was obtained with 86 kg ha-1 of N, with linear equations showing increased productivity of straw and industry yield, total protein, and reduction of the fiber content of oat grains by nitrogen use.

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Section: Resultsmentioning

confidence: 99%

Technical and agronomic efficiency of nitrogen use on the yield and quality of oat grains

Mantai

Silva

Carbonera

et al. 2021

Rev. bras. eng. agríc. ambient.

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“…Temperature acts as a biological process catalyzer, whereby plants need a minimum and maximum temperature for normal physiological activities (Tonin et al, 2014;Marolli et al, 2017). In cereals such as oat and wheat, milder temperature and radiation quality favor new tillers and grains grow impacting productivity (Arenhardt et al, 2015;Trautmann et al, 2020). In nitrogen management, the occurrence of intense rainfall right after fertilization, reduces the plant's efficiency due to lack of oxygenation and generates nutrient loss by leaching.…”

Section: Resultsmentioning

confidence: 99%

“…Wheat (Triticum aestivum) is a globally cultivated cereal, mainly for human consumption (Goergen et al, 2017;Mamann et al, 2019). In Brazil, winter wheat is economically important because of the large imports required to supply domestic demand (Arenhardt et al, 2015;Trautmann et al, 2020). Thus, there is need for scientific advancement in the genetics and management of winter wheat to promote self-sufficiency (Luche et al, 2017;Costa et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Efficiency of nitrogen use by wheat depending on genotype and previous crop

Kraisig

Silva

Pereira

et al. 2021

Rev. bras. eng. agríc. ambient.

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The efficiency of nitrogen use by wheat crop depends on genetic and environmental stimuli. The aim of this study was to evaluate the efficiency of nitrogen use by wheat crop, through biomass, productivity and grain quality indicators, as a function of the genotype and previous harvest, in Southern Brazil cereal cultivation systems. The experiments were conducted in soybean/wheat and maize/wheat systems during 2015, 2016, and 2017 in Augusto Pestana, RS, Brazil. The experimental design was a randomized block with four repetitions, following a 5 × 4 factorial scheme, referring to five wheat cultivars (Quartzo, TBIO Sinuelo, TBIO Sintonia, TEC 10 and TEC Vigore) and four nitrogen doses (0, 60, 120 and 180 kg ha-1) applied as a topdressing during the phenological stage of the expanded third leaf, stage 13. There were genetic differences in nitrogen use efficiency, for the productivity (yield and biomass) and quality of wheat. However, these genetic differences were influenced by the carbon:nitrogen ratios of the previous crop. Quartzo and TBIO Sinuelo had the greatest nitrogen use efficiency for grain yield, TBIO Sinuelo had the greatest nitrogen use efficiency for biomass production and Quartzo had the greatest nitrogen use efficiency for grain quality with expectation of 3 Mg ha-1, regardless of the succession system, in the joint analysis of agricultural years.

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“…Computational limitations until a few years ago meant that models with biological significance and statistical analyzes proved to be conflicting, leading to a preference for linear and/or polynomial models in relation to non-linear models, with greater biological significance. The computational advances already allow the use of nonlinear models of phenomena aggregating statistics and modeling together with biological processes, as well as the correct use of analysis of repeated measures in time, generating greater reliability for direct application in computer programs and applications in agriculture devices (Mamann, et al, 2019;Trautmann, et al, 2020).…”

Section: Resultsmentioning

confidence: 99%

Research Article A combination of regression and internal point methods as a hybrid model for estimating oat plant productivity

Marolli¹,

Silva²,

Rosa³

et al. 2021

Genet. Mol. Res.

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The internal points method (IPM-Carvalho), with regression analysis, can generate an efficient hybrid model for estimating oat grain productivity. We tested a combination of the internal points method and regression to estimate straw productivity. We also applied this methodology to forecast a harvest index in the elaboration of a hybrid model to estimate oat grain productivity, taking into account nitrogen management and growth regulator use, with biological and environmental indicators. Simulation of oat yield as a function of nitrogen and growth regulator applications, with biological and environmental inputs, can assist in the development of more efficient and sustainable management for this crop. Two experiments were conducted during 2013, 2014, and 2015; one was used to quantify biomass yield and the other to determine grain yield and plant lodging. The experimental design was randomized blocks with four replications in a 4 x 3 factorial scheme in the sources of variation, which were growth regulator (0, 200, 400 and 600 mL ha -1 ) and nitrogen (30, 90 and 150 kg ha applications. The environmental parameters that were included were rainfall and maximum air temperature. The nitrogen was applied as urea at the expanded fourth leaf stage. The growth regulator was trinexapac-ethyl applied at the ©FUNPEC-RP www.funpecrp.com.br Genetics and Molecular Research 20 (2): gmr18756 A. Marolli et al. 2 stage between the 1st and 2nd visible stem node. Straw productivity was obtained by the IPM model with nitrogen dose and rainfall inputs. The harvest index was obtained by regression as a function of the growth regulator doses. The combination of the internal points method to estimate straw productivity with the use of regression in the forecast of the harvest index proved to be a useful model for estimating oat grain productivity based on biological and environmental parameters, together with nitrogen and growth regulator applications.

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Simulation of wheat yield by nitrogen and nonlinearity of environmental conditions

Cited by 7 publications

References 24 publications

Technical and agronomic efficiency of nitrogen use on the yield and quality of oat grains

Technical and agronomic efficiency of nitrogen use on the yield and quality of oat grains

Efficiency of nitrogen use by wheat depending on genotype and previous crop

Research Article A combination of regression and internal point methods as a hybrid model for estimating oat plant productivity

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