Doutorado em Agronomia (EA)

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Navegando Doutorado em Agronomia (EA) por Por Orientador "Alves Júnior, José"

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    Respostas da cultura do tomate para processamento industrial a fatores ambientais e irrigação
    (Universidade Federal de Goiás, 2023-02-16) Knapp, Fábio Miguel; Battisti, Rafael; http://lattes.cnpq.br/9350992609794419; Alves Júnior, José; http://lattes.cnpq.br/3418524049655817; Alves Júnior, José; Battisti, Rafael; Casaroli, Derblai; Evangelista, Adão Wagner Pêgo; Bezerra, Ricardo de Souza
    The tomato crop for industry is strongly conditioned by environmental conditions. In this way, this work aimed to determine the meteorological variable with the greatest influence and contribution to growth and the thermal sum accumulated in each stage of development of different hybrids, in addition to evaluating the responses of tomato plants in two irrigation systems: central pivot sprinkler and located by subsurface drip. For this, experiments were set up in Abadia de Goiás, Hidrolândia, Itaberaí, Palmeiras de Goiás, Piracanjuba and Silvânia during the 2020 harvest, fortnightly collections of plants were carried out for biometric measurement of number of leaves, leaf area, number of branches, number of fruit and plant height, as well as the collection of meteorological variables from each location with the aid of an automatic meteorological station, to determine the variable with the greatest interference in the growth and development of the crop, canonical correlation and multivariate Stepwise regression were used, in addition to separation of averages by Scott-knott. The main variable that affected crop growth was water availability. The water supply was responsible for 86.2% of the plant height and 79.6% of the leaf area index. On the other hand, the average air temperature, solar radiation and accumulated thermal sum showed little influence on crop growth. The industrial tomato responded to the accumulated degree days, with the average degree days accumulated in the first and second seasons of 1,394 and 1,364 degree days, respectively, and its average cycle of 124 and 116 days from transplanting to maturation. The irrigation systems did not show savings in the amount of water used in the crop during the cycle, but the subsurface drip irrigation system provided a shorter period of leaf wetness, improving plant health, delaying senescence and leaf abscission and providing greater productivity and increase in water use efficiency in this system.
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    Uso do sensoriamento remoto para a estimativa da evapotranspiração atual e diagnóstico do manejo da irrigação da cultura do tomate industrial em Goiás
    (Universidade Federal de Goiás, 2021-02-26) Sena, Carolina Carvalho Rocha; Souza, João Maurício Fernandes; http://lattes.cnpq.br/3353704329752144; Battisti, Rafael; http://lattes.cnpq.br/9350992609794419; Alves Júnior, José; http://lattes.cnpq.br/3418524049655817; Alves Júnior, José; Casaroli, Derblai; Heinemann, Alexandre Bryan; Giongo, Pedro Rogério; Bezerra, Ricardo de Souza
    The cultivation of processing tomatoes in Goiás is carried out during the dry season, making irrigation necessary, however, usually its management is carried out empirically, which can lead to errors due to excess or water deficit. Thus, monitoring current irrigation management, as well as improving knowledge about crop evapotranspiration, are fundamental practices to improve the sizing of new irrigation projects, the management of water resources and the management of irrigation. Thus, this study aimed to evaluate the performance of the Simple Algorithm For Evapotranspiration Retrieving (SAFER) and Mapping Evapotranspiration at high Resolution using Internalized Calibration (METRIC) algorithms to estimate the current evapotranspiration (ETa) of processing tomatoes and to analyze the use of tomatoes of irrigation water for this crop in south-central Goiás. Both studies were carried out in nine areas where processing tomatoes irrigated by a central pivot, in Goiás, during 2018 and 2019. The study was divided into two stages: in the first stage, using images from the Landsat 8 OLI/TIRS, for estimation of ETa by SAFER and METRIC models comparing with ET obtained by FAO, Embrapa and soil water balance based on statistical indexes. The ETa of the processing tomato estimated by the algorithms throughout the cycle varied between 0.85 and 5.20 mm day-1, in general average. The SAFER model provided a better correlation with standard methods when compared to METRIC, with a correlation coefficient ranging from 0.64 to 0.99. The algorithms showed good statistical performance in the estimation of ETa in phases II and III of the processing tomato. The diagnosis of irrigation management indicated that in all the evaluated areas there were errors in irrigation management, when considering the total water applied in the cycle. The results showed that the water demands varied from 280.3 to 436.8 mm, in 109 to 129 days of cycle. The average error for excess water applied was 83.4 mm, representing 77.8% of the analyzed areas, and the deficit error was 39.3 mm, corresponding to 22.2% of the analyzed areas. The study also revealed that in all areas the irrigation was carried out at the wrong frequency, which may have caused the runoff of water on the soil surface. These results point to an incorrect management of irrigation in the production of processing tomatoes in Goiás.
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    Aplicação do algoritmo SAFER na obtenção da evapotranspiração atual das culturas em condições de cerrado
    (Universidade Federal de Goiás, 2016-03-03) Souza, João Maurício Fernandes; Casaroli, Derblai; http://lattes.cnpq.br/1054839770814863; Alves Júnior, José; http://lattes.cnpq.br/3418524049655817; Giongo, Pedro Rogério; Bufon, Vinicius Bof; Evangelista, Adão Wagner Pêgo; Brian, Alexandre; Casaroli, Derblai; http://lattes.cnpq.br/1054839770814863
    To realize an efficient management of water use in irrigated agriculture is important to obtain meteorological information to assist in the management of water resources. Since the data of evapotranspiration (ET) they are often used as a fundamental criterion in irrigation operations in the calculation of water balance and agroclimatic zoning. Therefore, the estimated evapotranspiration of culture on a regional scale, based on satellite images represent a great contribution to the studies on the management of water resources, being able to provide their estimate in areas with high heterogeneity and size, to Unlike micrometeorological methods and even of direct measures such as lysimeter. Compared to other models that use the energy balance, the SAFER (Simple Algorithm for Retrieving Evapotranspiration) has a simpler parameter, requiring only the remote data of the albedo, NDVI and temperature. The SAFER still has the additional advantage of using data from both types of stations meteorological conventional and automatic. This feature is important because it allows the assessment of historical trends of energy balance components on a large scale over the years,given that automatic sensors are relatively recent developments in instrumental technology. Considering the recent development of SAFER, there are not many studies to assess its performance. The aim of this study was estimate the culture evapotranspiration and their respective Kc's in its different phenological phases without water restriction, in areas in Goias Cerrado region, using remote sensing techniques for validation of the agro-meteorological model SAFER (Simple Algorithm for Evapotranspiration Retrieving) in compared to the method standard FAO 56. , using agrometeorological monitoring and after evaluation of the model's reliability, make a comparison between the ETr estimation method obtained by SAFER,with the climatological hidric balance and the soil water balance in order to validate the proposed methodology as an alternative to methods traditional. The structure of this study is as follows: after the introduction and literature review on the topic, the first chapter presents the SAFER calibration data and its application in bean crop, tomato, sugarcane and wheat in Goias Cerrado, taking as reference the water requirement estimates using the FAO methodology; and then, after proof of efficiency, in the second chapter presents the SAFER application results in a dry area cultivated with sugarcane in order to present it as an alternative to traditional methods