Mestrado em Agronomia (EA)
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Navegando Mestrado em Agronomia (EA) por Por Orientador "Alves Júnior, José"
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Item Variedades de cana-de-açúcar submetidas à irrigação suplementar no cerrado(Universidade Federal de Goiás, 2013-03-14) Campos, Patrick Francino; Casaroli, Derblai; Alves Júnior, José; http://lattes.cnpq.br/3418524049655817; Júnior, José Alves; Evangelista, Adão Wagner Pêgo; Casaroli, Derblai; Silva, Tony José Araújo daThe production chain of sugar cane has great importance in Brazilian socio-economic scenario. It contributes significantly to the gross domestic product (GDP). Is a renewable energy source, generates a currency with the export of sugar and ethanol, as well as being an activity of creating jobs. However, there is a lack of information relating different cane varieties and irrigation, especially in the Cerrado. So, you can ensure maximum productive and economic efficiency of this culture. The objective of this study was to evaluate the performance of sixteen commercial varieties of sugar cane under supplementary irrigation in the region of the Cerrado. The experiment was conducted in the region of Goianésia-GO, Brazil in an area of sugarcane irrigated, in a Clay Red Latosol, of april 2011 to may 2012. The experimental design used was randomized blocks, with 16 varieties (treatments): CTC2, CTC4, CTC9, CTC11, CTC15, CTC18, IAC87-3396, IAC91-1099, IACSP94-3046, IACSP94-2094, IACSP94-2101, IACSP95-5000, RB857515, RB92579, RB966928 and SP86-0042. It was irrigated 50% of the water crop requeriment. The irrigation were performed by Line bar sprinkler system. It was evaluated the number of tillers per meter, length of stalk, average diameter of culms, 10 stalks and technological parameters of the raw material. The results showed significant differences between varieties in relation to number of tillers per meter, length of cane, medium diameter culm, productivity and quality of production. For the 16 varieties evaluated, the most outstanding varieties in productivity, were CTC15 and IAC91-1099. The variety that was excelled in TPH was the variety CTC9. The variety CTC18 obtained results with lower productivity, TPH and number of tillers. It can be concluded that the CTC9 is a suitable material for supplementary irrigation cultivation (50%) in the region of Vale do São Patrício (Goiás State of Brazil) for presenting a high productivity and technological performance.Item Relações hídricas e crescimento do pequizeiro irrigado e adubado(Universidade Federal de Goiás, 2017-02-17) Miranda, Raiane Ferreira de; Casaroli, Derblai; http://lattes.cnpq.br/1054839770814863; Alves Júnior, José; http://lattes.cnpq.br/3418524049655817; Domingues, Luis Augusto da Silva; Evangelista, Adão Wagner Pêgo; Alves Júnior, José; Casaroli, DerblaiThe souari nut tree, native of the Brazilian Savannah, presents adaptation to the dry season and to poor soils. However, it is believed that in conditions of absence of water deficit and good soil fertility, the plant can develop better than in natural conditions, making commercial cultivation possible. Thus, the present study had as objective to evaluate the water relations and the growth of the souari nut trees in function of irrigation and organic fertilization. For this, 120 souari nut trees (from the 6 to the 8 year-old), spaced at 5.0 x 5.0 m were used in a randomized block experiment with six blocks and 16 plants per block, where four Treatments (IA: Irrigated and fertilizated, IN: Irrigated and no-fertilizated, SA: no-irrigated and fertilizated, SN: no-irrigated and no-fertilizated) in the scheme of subdivided plots. In Nov / 2014 the fertilization was of 12.5 kg of organic composting and 1.0 kg of Yorim, and in Nov / 2015, 5 kg of bovine manure and 2.5 kg of chicken manure per plant. The irrigation system used was a microsprinkler with a emitter per plant (Pressure = 10 mca, q = 43 L h-1, wet radius = 2 m), whereby, during the dry season, an average of 116.95 and 92,24 L plant-1 day-1 were applied in 2015 and 2016, respectively. Water relations evaluation consisted of foliar temperature monitoring (nov/2015 to jun/2016) and transpiration by means of sap flow density (out/2015 to may/2016) in irrigated and non-irrigated plants. As growth variables, the height and perimeter of the stem were evaluated monthly, crown area and root density at 6.5 and 7.1 year-old, respectively. The results showed that when irrigated the leaf temperature of the plant remains below the mean air temperature, regardless of the dry or rainy period, while without irrigation the plant presents in water deficit during the dry season. In dry conditions the mean perspiration of the souari nut tree is 24.09 L plant-1 day-1 and if irrigated on average 42.29 L plant-1 day-1. In spite of water supply and fertilization, the plant does not respond in growth in terms of height and stem perimeter. On the other hand, irrigation influences the canopy area, providing trees with larger canopy areas. When irrigated the souari nut tree presents distance and effective depth of the root system (80%) up to 2.00 m, and in dry conditions the roots are horizontally closer to the plant up to 1.60 m, in depth also concentrate up to 2,00m.Item Evapotranspiração máxima da cana de açúcar estimada pelo algoritimo SAFER(Universidade Federal de Goiás, 2017-03-15) Mussi, Rodolfo Fernandes; Evangelista, Adão Wagner Pego; http://lattes.cnpq.br/5171893735359718; Alves Júnior, José; http://lattes.cnpq.br/3418524049655817; Alves Júnior, José; Evangelista, Adão Wagner Pego; Casaroli, Derblai; Souza, João Maurício FernandesSugarcane is the main irrigated crop in Brazil (more than 25% of all irrigated areas in the country), requiring cumulative rainfall during its 1,000 mm year-1 cycle. Thus, evapotranspiration is a fundamental information for planning, hydro-hydraulic design, water management along the cycle and management of water resources for culture. Irrigation planning based on empirical values of the crop coefficient (Kc) can increase production costs, reduce product quality and yield. The use of remote sensing associated with orbital images and algorithms, aid in the estimation of evapotranspiration when combined with physical models. The SAFER is a simplified algorithm when compared to the others that are also used to determine the current evapotranspiration of the crop, since it is based on the Penman-Monteith equation to obtain the evapotranspiration, being this factor the main one to choose this algorithm for its use . In this way, the objective of this study was to determine the evapotranspiration of the sugarcane crop (first cycle), as well as the respective crop coefficients (Kc) for the region of the São Patrício Valley in Goiás, by energy balance (Using the remote sensing allied to the SAFER algorithm) and water balance (monitoring the atmosphere and water in the soil). Thus, this study had the objective of estimating crop evapotranspiration (ETa) of the variety IAC 91-1099 of sugarcane by the SAFER (Simple Algorithm for Evapotranspiration Retrieving) energy balance model using images from Landsat 8 OLI / TIRS, and comparison with soil water balance method (ETBHS) using soil moisture sensors (EC-5) and reference evapotranspiration (ETo Penman-Monteith). The study was carried out at Esplanada Farm, in Goianésia / Goiás, from June / 2015 to July / 2016, in medium texture soil with conventional tillage and transplanting of seedlings in irrigated areas of 100 ha (central pivot). In addition, plant height, stem diameter, leaf temperature, yield and juice quality were monitored. The water status of the soil and the plant revealed that there was no water deficit during the cycle of 398 days. The results also showed that for the estimation of sugarcane evapotranspiration the SAFER method overestimated the ETBHS in 22.89%. Despite of the ETa estimated by the SAFER method to present a significant correlation with the water balance method (R2 = 0.7778), other studies must be conducted before being recommended for estimation of sugarcane ETa in the region.Item Evapotranspiração e coeficiente de cultura do tomateiro industrial estimado por sensoriamento utilizando o algoritmo SAFER(Universidade Federal de Goiás, 2016-03-02) Sales, Déborah Lídya Alves; Casaroli, Derblai; http://lattes.cnpq.br/1054839770814863; Alves Júnior, José; http://lattes.cnpq.br/3418524049655817; Alves Júnior, José; Evangelista, Adão Wagner Pêgo; Ferreira, Manuel EduardoThe production of industrial tomato has stood out in the Brazilian agribusiness scenario. In the Cerrado region, production occurs in the dry season (May to October), in large irrigated areas, mainly by central pivot (irrigation system accounts for about 90% of the industrial tomato production area). Although the production is considered hi-tech, the sector is still very lacking in technical and scientific information to assist the crop reaches potential productivity and quality in the region. Proof of this is the low average yield obtained (80 t/ha) compared to major producing regions in the world (Spain, United States, mainly), which feature double that productivity. One of the required information is the water requirement of tomato hybrids on local growing conditions. The refinement of this information can contribute to a better design of irrigation projects, as well as better water management throughout the cycle, and the better management of water resources. However, traditional methods of research, in this area, require the use of evapotranspirometers, which are expensive and require occasional and data acquisition systems, which complicates their use. More, remote sensing techniques have been applied effectively, already tested in other regions and have been quite promising. This study aimed to estimate the current crop evapotranspiration (ET) two tomato hybrid for industrial processing, N901 and H1308, and their respective crop coefficients (Kc) by the energy balance model SAFER (Simple Algorithm for Evapotranspiration Retrieving) is using images from Landsat 8 OLI / TIRS in orbit 221/72 and 222/71, and compared to traditional micrometeorological method using reference evapotranspiration (ETo Penman-Monteith), with Kcs recommended by FAO 56 and Embrapa. The study was conducted at Fazenda head of Piracanjuba in the municipality of Silvânia-GO, in the period from May to August 2015, in clay soil with conventional tillage. In addition, the leaf water potential (weekly) and the water content in the soil water balance by the dynamic site was monitored. The water potential in leaf and soil moisture show that no water deficit throughout the 122-day cycle. The results showed also that the culture accumulated total evapotranspiration of 351.97, 340.97 and 356.24 mm, by FAO 56, EMBRAPA and SAFER methods, respectively. The Kcs estimated by SAFER method showed a significant correlation with the methods FAO 56 and Embrapa (FAO 56, R ² = 0.98; Embrapa, R² = 0.95).A ETa estimated by SAFER method showed a significant correlation with micrometeorological methods (FAO 56, R2 = 0.97 and EMBRAPA, R2 = 0.97). Therefore, Safer can be used to estimate the tomato ETa in the Cerrado region.