Remote sensing in estimating the actual evapotranspiration of the corn crop. Estimation of dry biomass of the seed corn culture from the orbital remote sensing. Efficiency of water use through water productivity estimated by remote sensing. The high air temperature causes a reduction in the biomass accumulated during the day.
A B S T R A C TThe therapeutic efficacy of herbal medicines and pesticides has increased the need to define cultivation parameters for medicinal plants. The objective of this study was to evaluate the production of essential oil and flavonoids of chamomile under irrigation levels and organic fertilizer doses. The experiment was conducted in the experimental area of the Campus II of the University of Western São Paulo, in the city of Presidente Prudente, SP, Brazil. The experimental design was a randomized block in triple factorial (6 x 2 x 3), corresponding to irrigation depths (150, 100, 75, 50, 25 and 0% of the reference evapotranspiration (ETo)), organic fertilizers (poultry manure and cattle manure) and the fertilizer doses (0, 3 and 5 kg m -2 ), with four replicates. The following variables were evaluated: capitulum dry matter, and content and yield of essential oil and flavonoids. For the tested conditions, it is recommended to use 5 kg m -2 poultry manure and water depth equivalent to 150% ETo for the production of essential oil and flavonoid.Irrigação e adubação orgânica na produção de óleo essencial e flavonoides em camomila R E S U M O A eficácia terapêutica de fitoterápicos e fitofármacos tem aumentado a necessidade de definir parâmetros de cultivo para plantas medicinais. O objetivo do presente trabalho foi avaliar a produção de óleo essencial e flavonoides da camomila quanto a lâminas de irrigação e doses de adubo orgânico. O experimento foi conduzido em área experimental do Campus II, da Universidade do Oeste Paulista, na cidade de Presidente Prudente, SP, Brasil. O delineamento experimental foi em blocos ao acaso em esquema fatorial triplo (6 x 2 x 3), sendo a lâmina de irrigação (150, 100, 75, 50, 25 e 0% da evapotranspiração de referência (ETo)), o adubo orgânico (esterco de aves e esterco bovino curtido) e a dose do adubo (0, 3 e 5 kg m -2 ) e quatro repetições. Foram avaliados a massa seca de capítulos florais, o teor e o rendimento de óleo essencial e o flavonoide; para as condições testadas recomenda-se utilizar 5 kg m -2 de esterco de ave e lâmina de irrigação equivalente a 150% ETo para a produção de óleo essencial e flavonoide. IntroductionChamomile is a medicinal and aromatic plant of great importance for the cosmetic and phytotherapeutic industry. It is the medicinal plant of greatest economic expression in the South region with cultivated area of 2,000 thousand ha in Paraná (Corrêa Júnior & Scheffer, 2014).Irrigation management consists in the rational use of water in order to meet the requirements of the plants, increasing production and water use efficiency (Shock & Wang, 2011;Pinto et al., 2014;Afshar et al., 2014). The water balance is one way of managing irrigation, considering the processes of absorption, conduction and loss of water. The difference between the water absorbed and lost by the plant is a relevant factor for the metabolic processes of adjustment of the plant (Bilibio et al., 2010).In situations of water deficit, medicinal plants can activate the secondary metaboli...
Due to the water balance in the Brazilian Cerrado, it is not necessary to cultivate arugula in a rainfed system. Together with the lack of research on with this crop, it is necessary to study the response of genotypes to irrigation in this biome. Thus, the objective of this study was to determine the optimal irrigation depth and to identify the best arugula genotypes. Three arugula genotypes were field-tested during two cycles under the effect of four irrigation depths based on crop evapotranspiration. The parameters evaluated were root depth, SPAD index, number of plants and leaves per plant, plant diameter, fresh shoot mass and water use efficiency. The arugula presented the same demand for irrigation in the two cycles, and the genotypes and/or irrigation depths affected the evaluated parameters. The results support that the Folha Larga variety should be preferred by Brazilian Cerrado producers and irrigated with 90% replacement of crop evapotranspiration.
The Penman-Monteith method (PM-FAO) is recommended as standard for calculation of reference evapotranspiration (ETo). However, its use requires a series of meteorological variables that is not normally available, restricting its application in many locations. A solution to the problem of unavailability of meteorological data was presented in FAO Bulletin 56, which contains methodologies for estimating wind speed, solar radiation and relative humidity. The objective of the present study was to evaluate the performance of the PM-FAO methodologies for missing data and Hargreaves-Samani as alternatives to the PM-FAO standard method at different time scales and seasons for the municipalities of Linhares and São Mateus, located in the northern region of the state of Espírito Santo. The comparison was performed using linear regression parameters (β0 and β1), coefficient of determination, standard error of estimation (SEE) and coefficient of performance. The best alternative to the standard PM-FAO standard method for estimating ETo in the studied area was the Penman-Monteith method with missing wind speed data, since the R2 for this method always remained above 0.94 and the confidence coefficient was classified as great, for all seasons and scales. The Hargreaves-Samani method did not present satisfactory performance, with R2 below 0.7, regardless of the time scale and time of the year, and it yielded the greatest SEE (1.0 mm d-1) at spring on a two-day scale. Thus, its use in the northern region of the Espírito Santo state is not recommended.
MANEJO E VIABILIDADE ECONÔMICA DA IRRIGAÇÃO NO CULTIVO DE Calendula officinalis L. CATARINY CABRAL ALEMAN¹ E PATRICIA ANGÉLICA ALVES MARQUES² ¹Departamento de Engenharia Agrícola, UFV, Avenida PH Rolfs, s/n, 36570-000, Viçosa, MG, Brasil, e-mail: catariny@ufv.br²Departamento de Engenharia de Biossistemas, UFV, Avenida Pádua Dias, 11, 13418-900, Piracicaba, São Paulo, Brasil, e-mail: paamarques@usp.br 1 RESUMO O objetivo do trabalho foi verificar a influência de lâminas de irrigação baseadas na evaporação do Tanque Classe A (ECA) na produtividade e avaliar a viabilidade econômica do uso da irrigação e adubação orgânica no cultivo de calêndula. O experimento foi conduzido em um delineamento de blocos ao acaso, com esquema de parcelas subdivididas e quatro repetições. Os tratamentos de irrigação foram: sem irrigação (0), 50%, 75% e 100% ECA e o efeito da adubação orgânica: testemunha sem adubação orgânica e adubação orgânica com esterco bovino curtido. Avaliou-se massa seca de capítulos florais, produtividade, teor e rendimento de flavonóides, custos fixos e totais de produção, receitas líquida e relação B/C. A irrigação foi viável para o cultivo sem adubação para 75 e 100% ECA e para o cultivo com adubação apenas para 50% ECA. O manejo econômico adequado é a utilização de lâmina de irrigação de 100% ECA sem adição da adubação orgânica, utilizando motor elétrico com tarifa verde. Palavras-chave: análise de risco; manejo de recursos hídricos; eficiência do uso da água; plantas medicinais. ALEMAN, C. C.; MARQUES, P. A.MANAGEMENT AND ECONOMIC VIABILITY OF IRRIGATION IN THE CULTIVATION OF Calendula officinalis L. 2 ABSTRACT The aim of the study was to determine the influence of irrigation levels based on pan evaporation Class A (ECA) in productivity and evaluate the economic feasibility of the use of irrigation and organic fertilizer on marigold cultivation. The experiment was conducted in a design of randomized blocks with split plots and a four-replication scheme. The irrigation treatments were: no irrigation (0) 50%, 75% and 100% ECA and the effect of organic fertilization: control with no fertilization and organic fertilization with cattle manure. We evaluated dry mass of capitula, productivity, content and yield of flavonoids, fixed and total costs of production, net income and B/C ratio. Irrigation was feasible for cultivation with no fertilization for 75 and 100% ECA and for cultivation with fertilizer, only at 50% ECA. Proper economic management is the use of irrigation depth of 100% ECA with no addition of organic fertilizers, using electric motor with green tariff. Keywords: risk analysis; management of hydric recourse; water use efficiency, medicinal plant.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.