Padrões Climatológicos De Precipitação E Temperatura Do Ar Associados Ao Rendimento Do Feijão Comum Em Minas Gerais

Santos, Luiz Fernando dos; Martins, Fabrina Bolzan; Garcia, Sâmia Regina

doi:10.5380/abclima.v1i0.59108

Cited by 3 publications

(5 citation statements)

References 20 publications

(45 reference statements)

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“…As safras de feijão mais impactadas em Itajubá, provavelmente, serão a 2ª e 3ª, com data média de plantio em 25/jan e 05/jul, respectivamente (SANTOS et al, 2018). A 2ª safra será impactada durante o florescimento, que vai do início de março a abril, enquanto a 3ª será impactada na germinação, florescimento (pré-floração e floração) e frutificação (formação e enchimento das vagens).…”

Section: Impactos Das Mudanças Climáticas Nas Principais Culturas Em unclassified

“…A 2ª safra será impactada durante o florescimento, que vai do início de março a abril, enquanto a 3ª será impactada na germinação, florescimento (pré-floração e floração) e frutificação (formação e enchimento das vagens). A DEF durante o florescimento, que vai de julho a agosto, provoca o aborto e a queda das flores, reduzindo o número de vagens por planta e o rendimento médio (HEINEMMAN et al, 2016;HEINEMANN et al, 2017;SANTOS et al, 2018). A DEF durante a frutificação, que vai de agosto a setembro, induz a queda das vagens recém-formadas, prejudica a formação de sementes nas vagens, diminui a massa e o rendimento (OLIVEIRA et al, 2018).…”

Section: Impactos Das Mudanças Climáticas Nas Principais Culturas Em unclassified

“…A DEF durante a frutificação, que vai de agosto a setembro, induz a queda das vagens recém-formadas, prejudica a formação de sementes nas vagens, diminui a massa e o rendimento (OLIVEIRA et al, 2018). Além disso, o plantio da 3ª safra ocorre justamente nos meses de julho e agosto sendo necessárias chuvas para que ocorra a germinação uniforme das sementes (SANTOS et al, 2018). Entretanto, chuvas excessivas reduzem a oxigenação do solo e a atividade radicular, afetando a absorção de água e nutrientes pelo feijoeiro (HEINEMANN et al, 2009).…”

Section: Impactos Das Mudanças Climáticas Nas Principais Culturas Em unclassified

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Balanço Hídrico Climatológico Para Itajubá-Mg: Cenário Atual E Projeções Climáticas

Alves¹,

Martins²,

Reboita³

2021

RBClima

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Projeções climáticas ao longo do século XXI têm indicado aumento da temperatura do ar, e irregularidades na precipitação no Estado de Minas Gerais (MG), os quais afetarão a evapotranspiração e, consequentemente, o balanço hídrico. Dessa forma, o objetivo desse trabalho foi verificar o impacto das mudanças climáticas no balanço hídrico climatológico (BHC) no município de Itajubá no período de 2021 a 2099 considerando o cenário de emissão Representative Concentration Pathway (RCP) 8.5 do Intergovernmental Panel on Climate Change (IPCC). Neste estudo, foram utilizadas projeções do modelo climático regional RegCM4 dirigido pelas saídas do modelo global HadGEM2-ES. O BHC foi calculado para o clima presente (1979 – 2005), futuro próximo (2021 – 2049) e futuro distante (2071 – 2099), considerando o método de Thornthwaite e Mather simplificado, em que considera como dado de entrada a climatologia mensal da temperatura média do ar e da precipitação. Projeta-se, no final do século XXI, um aumento de aproximadamente 5ºC na temperatura média do ar para Itajubá, além de um padrão heterogêneo de precipitação, com projeções de aumento nos meses de primavera e verão e redução nos meses de outono e inverno. Para o BHC é projetado aumento gradual na evapotranspiração real, chegando a 86 mm mês-1 nos meses de verão, e alteração na deficiência (DEF) e excedente hídrico (EXC). De maneira geral, é projetado um aumento da DEF e EXC nos meses de outono, inverno e verão, respectivamente. Tais alterações podem acarretar prejuízos para os principais cultivos de Itajubá, como o milho, a batata, o feijão e o café.

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Section: Impactos Das Mudanças Climáticas Nas Principais Culturas Em unclassified

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Balanço Hídrico Climatológico Para Itajubá-Mg: Cenário Atual E Projeções Climáticas

Alves¹,

Martins²,

Reboita³

2021

RBClima

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“…On a global scale, the economic and social dynamics can suffer changes. Since the use of soil is predominantly dealt with globally, agriculture involves important eco-the weather and climate' (Santos et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Influence of meteorological factors on the relative water content of coffee plants in the field

Neofti¹,

Torres

Giomo

et al. 2023

AgroM

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Global climate change is leading to changes in rainfall and temperature parameters. With the lack of water, the coffee plant presents growth and development restrictions. The air temperature also affects the coffee plant. The genetic improvement of coffee can help overcome these difficulties with new cultivars more adapted to the effects of climate change. So, the objective of the present study was to characterize the relative water content (RWC) of Coffea arabica plants of the cultivar Bourbon Vermelho and the variety Semperflorens, respectively sensitive and tolerant to water deficit under field conditions, cultivated in an experimental area in southeastern Brazil. The RWC was evaluated from September to February for three consecutive years in leaves taken from two branches belonging to the apical and basal portions of four plants, positioned facing the cardinal points West and East. The Bourbon Vermelho cultivar and the Semperflorens variety under water deficit had similar RWC responses, around 60%, for both the branches belonging to the apical and basal portions of the plants. It was also demonstrated that RWC was not different between the branches positioned in relation to the East and West cardinal points in both the apical and basal portions for plants of the Bourbon Vermelho cultivar and the Semperflorens variety.

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“…Figure 1) and is an agricultural state, occupying the fifth overall position in national production level rankings. We emphasize the diversity of the production, which includes fruit trees, olive trees [34], coffee trees [35], sugar cane [36], potato [37], maize [38], soybean [39], and bean plantations [40]. Furthermore, MG has a typical monsoon climate, with two welldefined seasons: the dry winter (June, July, and August) and the humid summer (December, January, and February), influenced by local convective activities and the South American Monsoon System (SAMS) [36], and both contribute to the state ranking with one of the country's biggest agricultural yields [41].…”

Section: Introductionmentioning

confidence: 99%

Global Solar Radiation Models in Minas Gerais, Southeastern Brazil

Monteiro

Martins

2019

Advances in Meteorology

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Accurate and complete global solar radiation (Hs) data at a specific region are crucial for regional climate assessment, crop growth modeling, and all operations that use solar energy. However, in the Minas Gerais state, Southeastern Brazil (SEB), the number of weather stations that measure global solar radiation is scarce, and when it is available, it presents gaps in the time series. An attractive alternative to solve the data gap problem is to estimate global solar radiation using empirical models. In this study, thirteen models based on maximum and minimum air temperatures, precipitation, sunshine duration, and extraterrestrial solar radiation were compared in the daily estimation of Hs. Data from 10 weather stations, from 1999 to 2017, located in Minas Gerais were used. Also, cluster analysis was used to group the localities (weather stations) with similar patterns of model performance, climatic classification (Köppen–Geiger and Thornthwaite), and seasonal data variability, considering minimum and maximum air temperatures, precipitation, sunshine duration, and global solar radiation. Although it is apparently simple, studies on this subject are scarce and the few existing ones in Minas Gerais have flaws, which justifies this study. The models were evaluated by root mean square error (RMSE), mean absolute percentage error (MAPE), mean bias error (BIAS), Willmott’s index of agreement (d), and performance index (c-index). Models based on sunshine duration, such as those proposed by Ertekin and Yaldiz and by Newland, showed the best performance (average c-index = 0.71). Models based on temperature and precipitation showed the worst results (average c-index = 0.41). Cluster analysis showed that there is a similar pattern between the performance of the models, climatic classification, and seasonal variability of data among the localities of Minas Gerais. In general, models that presented extremely poor performance were formed with weather stations located in the dry zone, but with different climate classification, and models that presented very good (and good) performance were composed by weather stations located in the humid zone (dry subhumid) with the same climate classification and similar seasonal variability. Furthermore, the models based on temperature have a tendency to overestimate radiation values below 10 MJ·m−2 day−1 and to underestimate values higher than 25 MJ·m−2 day−1. This point is a limitation of the model for estimating global solar radiation below and above these levels, showing the influence of atmospheric systems and atmospheric attenuation mechanisms of global solar radiation.

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Padrões Climatológicos De Precipitação E Temperatura Do Ar Associados Ao Rendimento Do Feijão Comum Em Minas Gerais

Cited by 3 publications

References 20 publications

Balanço Hídrico Climatológico Para Itajubá-Mg: Cenário Atual E Projeções Climáticas

Balanço Hídrico Climatológico Para Itajubá-Mg: Cenário Atual E Projeções Climáticas

Influence of meteorological factors on the relative water content of coffee plants in the field

Global Solar Radiation Models in Minas Gerais, Southeastern Brazil

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