Simulation of wheat yield by nitrogen and nonlinearity of environmental conditions/Simulacao da produtividade do trigo pelo nitrogenio e nao linearidade das condicoes ambientais

Fuzzy logic can simulate wheat productivity by assisting crop predictability. The objective of the study is the use of fuzzy logic to simulate wheat yield in the conditions of nitrogen use, together with the effects of air temperature and rainfall, in the main cereal succession systems in Southern B...

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Published inRevista brasileira de engenharia agrícola e ambiental Vol. 24; no. 1; p. 44
Main Authors Trautmann, Ana P.B, da Silva, Jose A.G, Binelo, Manuel O, Valdiero, Antonio C, Henrichsen, Luana, Basso, Natiane C.F
Format Journal Article
LanguageSpanish
Published ATECEL--Associacao Tecnico Cientifica Ernesto Luiz de Oliveira Junior 01.01.2020
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Summary:Fuzzy logic can simulate wheat productivity by assisting crop predictability. The objective of the study is the use of fuzzy logic to simulate wheat yield in the conditions of nitrogen use, together with the effects of air temperature and rainfall, in the main cereal succession systems in Southern Brazil. The study was conducted in the years 2014, 2015 and 2016, in Augusto Pestana, RS, Brazil. The experimental design was a randomized block design with four repetitions in a 4 x 3 factorial scheme for N-fertilizer doses (0, 30, 60, 120 kg [ha.sup.-1]) and nutrient supply forms [100% in phenological stage [V.sub.3] (third expanded leaf); (70%/30%) in the phenological stage [V.sub.3]/[V.sub.6] (third and sixth expanded leaf) and; fractionated (70%/30%) at the phenological stage [V.sub.3]/E (third expanded leaf and beginning of grain filling)], respectively, in the soybean/wheat and corn/ wheat systems. The pertinence functions and the linguistic values established for the input and output variables are adequate for the use of fuzzy logic. Fuzzy logic simulates wheat grain yield efficiently in the conditions of nitrogen use with air temperature and rainfall in crop systems. Key words: Triticum aestivum, temperature, precipitation, fuzzy logic, modeling A logica fuzzy pode simular a produtividade do trigo auxiliando na previsibilidade de safras. Objetivou-se no estudo o uso de logica fuzzy para simulacao da produtividade do trigo nas condicoes de uso do nitrogenio junto aos efeitos de temperatura do ar e precipitacao pluviometrica, nos principais sistemas de sucessao do cereal no sul do Brasil. O estudo foi conduzido nos anos de 2014, 2015 e 2016, em Augusto Pestana, RS, Brasil. O delineamento experimental foi o de blocos casualizados com quatro repeticoes em fatorial 4 x 3, para doses de N-fertilizante (0, 30, 60, 120 kg [ha.sup.-1]) e formas de fornecimento do nutriente [condicao unica (100%) no estadio fenologico [V.sub.3] (terceira folha expandida); fracionada (70%/30%) no estadio fenologico [V.sub.3]/[V.sub.6] (terceira e sexta folha expandida) e; fracionada (70%/30%) no estadio fenologico [V.sub.3]/E (terceira folha expandida e inicio do enchimento de graos)], respectivamente, no sistema soja/trigo e milho/trigo. As funcoes de pertinencias e os valores linguisticos estabelecidos para as variaveis de entrada e de saida se mostram adequados para o uso da logica fuzzy. A logica fuzzy simula com eficiencia a produtividade de graos de trigo nas condicoes de uso do nitrogenio com temperatura do ar e precipitacao pluviometrica nos sistemas de cultivo. Palavras-chave: Triticum aestivum, temperatura, precipitacao, logica fuzzy, modelagem
ISSN:1415-4366
1807-1929
DOI:10.1590/1807-1929/agriambi.v24n1p44-51