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Item Water requirement satisfaction index for coffee (Coffea canephora) crops in Western Amazon(Departamento de Engenharia Agrícola - UFCG, 2024-07-30) José, Jefferson V.; Pereira, Lívia B.; Souza, Moisés D.; Leite, Kelly N.; Santos, Otávio N. A.; Santos, Lucas C.Water balance is a tool that has various applications in agriculture, including assessing whether an environment is suitable for growing a specific crop by providing information on how water resources function in the system. This information is essential for determining whether the available water satisfies the crop’s demand. Thus, the objective of this work was to calculate the water balance of Typic Hapludults for growing coffee (Coffea canephora) crops in Cruzeiro do Sul, Acre, Brazil, using a 36-year historical series to assess the potential and limitation of the crop according to the water availability. The results showed that coffee crops are, in general, suitable for growing in the study region. Water deficit and water surplus periods are well-defined, from April to August and September to March, respectively. Flowering was the only stage of coffee crops that coincides with the water deficit period in the region; thus, irrigation is necessary to prevent compromising this stage and fruit development. The Water Requirement Satisfaction Index (WRSI), calculated on a monthly basis, indicates a low climate risk for coffee crops in the region. However, when calculated on a daily basis, the WRSI shows a medium to high climate risk for coffee crops in several periods. The WRSI proved to be an adequate tool for assisting in decision-making regarding the adoption of irrigation.Item Nutrição do cafeeiro sob fertirrigação com água residuária de origem urbana(Departamento de Engenharia Agrícola - UFCG, 2005-12) Souza, José A. A. de; Medeiros, Salomão de S.; Soares, Antônio A.; Ramos, Márcio M.; Neves, Júlio C. L.; Souza, José A. deO objetivo deste estudo foi avaliar os efeitos da fertirrigação com água residuária de origem urbana bruta, aplicada via gotejamento e sem adubação química, sobre a nutrição do café arábica (Coffea arabica); comparado com a irrigação com água doce mais adubação convencional, o experimento foi conduzido na Unidade Piloto de Tratamento de Água Residuária e Agricultura Irrigada, no campus da UFV, durante 18 meses. Cinco foram os tratamentos fertirrigados (MR’s) com cinco lâminas de água residuária (406, 515, 798, 924 e 1071 mm) e um irrigado com água doce mais adubação e calagem (MC). Avaliaram-se os teores de macronutrientes (N, P, K, Ca, Mg e S) nas folhas do cafeeiro, ao longo do tempo, em seis análises trimestrais. Os resultados demonstraram que: O MR apresentou maior teor de Mg que o MC, durante todo o período avaliado e de Ca e P durante os primeiros 12 meses; os teores de N e S não diferiram entre os tratamentos, e o teor de K no MC foi sempre superior ao do MR.Item Efeitos da fertirrigação com água residuária de origem urbana sobre a produtividade do cafeeiro(Departamento de Engenharia Agrícola - UFCG, 2005-12) Souza, José A. A. de; Ramos, Márcio M.; Soares, Antônio A.; Neves, Júlio C. L.; Medeiros, Salomão de S.; Souza, José A. deO principal objetivo deste estudo foi avaliar os efeitos sobre a produtividade do café arábica (Coffea arabica), da fertirrigação via irrigação por gotejamento, trabalhando com água residuária de origem urbana não tratada (AR); comparado com a irrigação com água doce (AD) mais adubação; o experimento foi conduzido na Unidade Piloto de Tratamento de Água Residuária e Agricultura Irrigada, no campus da UFV, durante 18 meses. Cinco foram os tratamentos fertirrigados (MR’s) com cinco lâminas de AR (406, 515, 798, 924 e 1071 mm); um irrigado com AD mais adubação (MC); além da testemunha, sem irrigação e sem adubação (T0). Avaliaram-se as produtividades dos anos I e II e a média bianual; concluiu-se, através dos resultados, que: não houve diferença entre os MR’s pelo teste de Duncan a nível de 5% de probabilidade; no ano I, a produtividade média no MR foi superior à do T0; no ano II, a produtividade do MC foi superior à do MR e neste à do T0; e na média bianual, MR e MC não diferiram e foram superiores à T0.Item Métodos multivariados na avaliação dos atributos físicos do solo na cafeicultura irrigada(Revista Engenharia na Agricultura, 2011-04-04) Cortez, Jorge Wilson; Fernandes, André Luis Teixeira; Silva, Rouverson Pereira da; Carvalho Filho, Alberto; Furlani, Carlos Eduardo AngeliObjetivou-se, com este trabalho, avaliar o efeito de sistemas de irrigação (pivô central, tubos perfurados a laser, gotejamento, aspersão em malha e testemunha) nos atributos físicos do solo (teor de água, massa específica, porosidade total e resistência à penetração), em área de cafeicultura do município de Uberaba – MG, por meio de métodos multivariados. O experimento foi realizado na Fazenda Escola da Universidade de Uberaba (UNIUBE). A área, onde foi realizada a amostragem para determinação dos atributos físicos do solo, nas profundidades de 0-10; 10-20 e 20-30 cm, foi dividida pelos sistemas de irrigação. Os métodos multivariados utilizados foram a análise de agrupamento hierárquica e de componentes principais. Pela análise de agrupamento, verificou-se que os sistemas de irrigação por pivô central e por gotejamento formaram um grupo distinto, enquanto os sistemas por aspersão em malha, testemunha e por tubos perfurados a laser ficaram separados, individualmente. A testemunha foi praticamente similar ao método de irrigação por tubos perfurados a laser. Na análise de componentes principais, foi possível verificar que 73,2 % das informações concentraram-se nos componentes principais um e dois. Portanto, os dados dos atributos físicos do solo (teor de água, massa específica, porosidade total e resistência à penetração do solo), que refletem o efeito dos sistemas de irrigação, estão concentrados, principalmente, na camada de 10 a 20 cm.Item Nutritional characteristics of conilon coffee genotypes grown in transition altitude with water management in soil(Editora UFLA, 2021-10-27) Salles, Rodrigo Amaro de; Jordaim, Renan Baptista; Colodetti, Tafarel Victor; Rodrigues, Wagner Nunes; Amaral, José Francisco Teixeira do; Tomaz, Marcelo AntonioThe modification of water management in the Conilon coffee (Coffea canephora) crop is a possible strategy to improve nutritional management efficiency and ensure better use of the genotypes for regions of transitional altitude. The objective of this study was to evaluate the nutritional characteristics of 27 genotypes of C. canephora and submit them to two water management schemes in soil. The goal was to find evidence of higher leaf contents, exports, and nutrient recycling potential in the productive branches of various genotypes. The experiment was carried out in a randomized block design with three replications in a split-plot scheme. The treatment consisted of 27 genotypes of C. canephora and two water management schemes in soil (“Irrigated” and “Rainfed”). Nutritional content in leaves, exported by fruits, and pruned (leaves and stem of plagiotropic branches) recyclable contents were evaluated for nitrogen, phosphorus, potassium, calcium, and magnesium. Variations were observed among genotypes for all the parameters evaluated in both water management in soil. However, significant homogeneous groups were formed among the genotypes in the irrigated management. Furthermore, the genotypes showed distinct nutritional characteristics in response to water management in the soil. Genotypes 108 and 302 had higher nutritional content and were exported by fruits, regardless of soil water management.Item Different nitrogen levels on vegetative growth and yield of conilon coffee (Coffea canephora)(Universidade Federal de Santa Maria, 2022-05-11) Busato, Camilo; Reis, Edvaldo Fialho dos; Oliveira, Marcos Góes; Garcia, Giovanni de Oliveira; Busato, Cristiani Campos Martins; Partelli, Fábio LuizThe determination of nitrogen in plants by techniques that allow a fast diagnosis, based on plant growth characteristics, can be a useful tool for the nutritional management of coffee plants. Thus, this study evaluated growth and yield characteristics of irrigated conilon coffee in response to different nitrogen levels, resulting in the determination of the minimum N levels required to achieve the maximum yield, here called critical levels. The experiment was carried out in Colatina, Espirito Santo, Brazil, on plantations of conilon coffee, clonal variety Emcapa 8111, genotype 02. Six nitrogen levels were applied (0, 110, 220, 440, 880 and 1320 kg N ha-1) and the response in growth and yield characteristics periodically evaluated. There was a positive effect of the increasing N levels on yield, in that the N levels that provided 95% of the maximum yield (137.4 bags ha-1 and 108.5 bags ha-1) in the 2012/2013 and 2013/2014 growing seasons, respectively, were 420.7 and 543.1 kg N ha-1. There was also a positive effect of N levels on the growth characteristics and nitrogen contents, indicating their use as tools for a rapid nutritional diagnosis, with a view to optimizing the nitrogen management in Conilon coffee.Item Bayesian modeling of the coffee tree growth curve(Universidade Federal de Santa Maria, 2022-03-14) Pereira, Adriele Aparecida; Silva, Edilson Marcelino; Fernandes, Tales Jesus; Morais, Augusto Ramalho de; Sáfadi, Thelma; Muniz, Joel AugustoWhen modeling growth curves, it should be considered that longitudinal data may show residual autocorrelation, and, if this characteristic is not considered, the results and inferences may be compromised. The Bayesian approach, which considers priori information about studied phenomenon has been shown to be efficient in estimating parameters. However, as it is generally not possible to obtain marginal distributions analytically, it is necessary to use some method, such as the weighted resampling method, to generate samples of these distributions and thus obtain an approximation. Among the advantages of this method, stand out the generation of independent samples and the fact that it is not necessary to evaluate convergence. In this context, the objective of this work research was: to present the Bayesian nonlinear modeling of the coffee tree height growth, irrigated and non-irrigated (NI), considering the residual autocorrelation and the nonlinear Logistic, Brody, von Bertalanffy and Richard models. Among the results, it was found that, for NI plants, the Deviance Information Criterion (DIC) and the Criterion of density Predictive Ordered (CPO), indicated that, among the evaluated models, the Logistic model is the one that best describes the height growth of the coffee tree over time. For irrigated plants, these same criteria indicated the Brody model. Thus, the growth of the non-irrigated and irrigated coffee tree followed different growth patterns, the height of the non-irrigated coffee tree showed sigmoidal growth with maximum growth rate at 726 days after planting and the irrigated coffee tree starts its development with high growth rates that gradually decrease over time.Item Use of organic fertilization with irrigation in coffee production in brazilian cerrado(Instituto de Pesquisas Ambientais em Bacias Hidrográficas, 2020) Fernandes, André Luís Teixeira; Fraga Júnior, Eusímio Felisbino; Santana, Márcio José de; Silva, Reginaldo de Oliveira; Dias, Marcelo MoreiraCoffee irrigation has increased in the main Brazilian coffee regions. However, in recent years, with climate change, years with water deficits greater than 150 mm have been observed, affecting the vegetative and productive development of the crop and also the replenishment of surface and underground springs. One practice that increases soil water retention capacity is organic fertilization. This work evaluated different combinations of irrigation and organic fertilization on the yield and quality of coffee produced in the Minas Gerais cerrado region. The treatments were: T1: total irrigation; T2: no irrigation; T3: total irrigation + organic fertilization (chicken manure, 10 ton ha-1); T4: no irrigation + organic fertilization (chicken manure, 10 ton ha-1); T5: 50% irrigation + organic fertilization (chicken manure, 10 ton ha-1). After 7 harvests, it was concluded that the treatment that combined organic fertilization with application of half of the necessary irrigation presented the best yield, superior to the treatment with total irrigation and exclusively mineral nutrition.Item Irrigation and light acess effects on Coffea arabica L. leaves by FTIR-chemometric analysis(Sociedade Brasileira de Química, 2018) Sanchez, Patrícia M.; Pauli, Elis D.; Scheel, Guilherme L.; Rakocevic, Miroslava; Brunsc, Roy E.; Scarminio, Ieda S.Coffee bean chemical compositions has been extensively studied. However, there is a small amount of research on other parts of the coffee plant, including leaves. Fourier transform infrared (FTIR) spectral profiles of Coffea arabica L. cv. IAPAR 59 leaf extracts from a simplex-centroid design were studied by principal component analysis (PCA) to evaluate the effect of solvente extractor on its metabolites. PCA indicated that the extractor solvents containing ethanol were the most suitable for this study. FTIR spectra in conjunction with orthogonal signal correction and partial least squares-discrimination analysis (OSC-PLS-DA) were used to classify and discriminate the leaves of irrigated and non-irrigated plants by bands related to carbohydrates, amino acids and lipids. Leaves receiving different intensities of solar radiation were also discriminated by bands corresponding to caffeine, carbohydrates and lipids. FTIR spectral profile analyzed with chemometric tools showed to be a useful, powerful and simple procedure to discriminate coffee leaves collected from different microclimate conditions.Item Probable rainfall contribution to coffee water demand in Uberlândia, Minas Gerais state, Brazil(Universidade Federal Rural da Amazônia (UFRA), 2015) Ribeiro, Bruno Teixeira; Silva, Cláudio Ricardo daThe occurrence, distribution of rainfall and the knowledge of crop water demand are essentials to irrigation planning. Thus, the determination of probable rainfall can contribute substantially to suitable irrigation projects. This work aimed to determine the probable rainfall for Uberlândia, Minas Gerais state, Brazil, in order to evaluate its contribution to coffee water demand. Daily precipitation data from 1975 to 2010 were summed in a 30-day period (monthly) and applied to Gamma distribution. The probable rainfall was estimated to different probability levels (%): 40, 45, 55, 65, 75, 85, and 95. With 75% of probability of exceedance (considered suitable to irrigation purposes) the probable rainfall in Uberlândia overcomes the coffee evapotranspiration only in December and January, suggesting a supplementary irrigation for vegetative growth and fructification periods (from October to April-May). During the entire dry-season the probable rainfall does not overcome the coffee evapotranspiration.