RELATIVE CHLOROPHYLL INDEX OF MAIZE AND SOYBEAN ACCORDING TO WEATHER CONDITIONS AT DIFFERENT TIMES OF DAY
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https://doi.org/10.32404/rean.v7i2.5058Abstract
The present study aimed to identify the best day time to evaluate the relative chlorophyll index in maize and soybean crops as a function of weather conditions. The experiments were conducted in the 2018/2019 harvest, in January and February, in the experimental area of the State University of Goiás, Ipameri University Unit, in Ipameri-GO. A completely randomized design with three replications and 40 plants per plot was used. The measurements of relative chlorophyll index at 7:00, 10:00, 13:00, 16:00, and 19:00, at the maize stage R1 (silking) and soy stage R2 (full bloom), were evaluated. The replications consisted of alternating days over seven days. The relative chlorophyll index, leaf temperature, air temperature, and relative humidity, and light incidence were evaluated. The data were organized, and regression analysis was performed for all variables. The statistical analysis was processed using the Sisvar statistical analysis software. The maize shows higher values of relative chlorophyll index at times with the highest temperatures. For soybean, the relative chlorophyll index must be measured at temperatures close to 30 ºC. Studies with more species of C3 metabolisms, such as soybeans, should be carried out to standardize an adequate time to read the relative chlorophyll index.References
(I) Amarante, C.V.T., Steffens, C.A., Sangoi, L., Zanardi, O.Z., Miqueloto, A., Schweitzer, C., 2010. Quantificação de clorofilas em folhas de milho através de métodos ópticos não destrutivos. Revista Brasileira de Milho e Sorgo, 9(1), 39-50.
(II) Anjos, D.N., Mendes, H.T.A., Vasconcelos, R.C., Moreira, P.M., Cangussu, A.C.V., Pires, E.S., 2017. Avaliação do feijoeiro comum em função dos bioestimulantes, NPK e micronutrientes em Vitória da Conquista – BA. Agrarian, 10(35), 1-9.
(III) Arnon, D.I., 1949. Copper enzymes in isolated chloroplasts: polyphenoloxidases in Beta vulgaris. Plant Physiology, 24(1), 1-15.
(IV) Boldt, J.K., Altland, J.E., 2019. Timing of a Short-Term Reduction in Temperature and Irradiance Affects Growth and Flowering of Four Annual Bedding Plants. Horticulturae, 5(1), 15.
(V) Coelho, P.H.M., Benett, K.S.S., Arruda, N., Benett, C.G.S., Nascimento, M.V., 2019. Crescimento e produtividade de dois cultivares de soja em função de doses de silício. Revista de Agricultura Neotropical, 6(3), 60-65.
(VI) CONAB. Companhia Nacional de Abastecimento, 2019. Ministério da Agricultura, Pecuária e Abastecimento. Acompanhamento da Safra Brasileira, Safra 2018/2019. Brasília, Ministério da Agricultura, Pecuária e Abastecimento, 65 p.
(VII) Djanaguiraman, M., Schapaugh, W., Fritschi, F., Nguyen, H., Prasad, P.V., 2019. Reproductive success of soybean (Glycine max L. Merril) cultivars and exotic lines under high daytime temperature. Plant, Cell and Environment, 42(1), 321-336.
(VIII) EMBRAPA. Empresa Brasileira de Pesquisa Agropecuária, 2018. Centro Nacional de Pesquisas de Solos. Sistema brasileiro de classificação dos solos, quinta ed. Brasília, Empresa Brasileira de Pesquisa Agropecuária, 586 p.
(IX) Ferreira, D.F., 2014. Sisvar: a Guide for its Bootstrap procedures in multiple comparisons. Ciência e Agrotecnologia, 38(2), 109-112.
(X) Godoy, L.J.G., Souza, T.R, Villas Bôas, R.L., 2010. Perspectivas de uso de métodos diagnósticos alternativos: Análise da seiva e medida indireta da clorofila, in: Prado, R.M., Cecílio Filho, A.B., Correa, M.A.R., Puga, A.P., (Eds.). Nutrição de plantas: diagnose foliar em hortaliças. Fundunesp, Jaboticabal, p. 135-184.
(XI) Gomes, I.S., Benett, C.G.S., Silva Junior, R.L., Xavier, R.C., Benett, K.S.S., Silva, A.R., Coneglian, A., 2017. Boron fertilisation at different phenological stages of soybean. Australian Journal of Crop Science, 11(8), 1026-1032.
(XII) Jesus, S.V.D., Marenco, R.A., 2008. O SPAD-502 como alternativa para a determinação dos teores de clorofila em espécies frutíferas. Acta Amazonica, 38(4), 815-818.
(XIII) Kerbauy, G.B., 2004. Fisiologia Vegetal. Guanabara Koogan, Rio de Janeiro.
(XIV) Mamrutha, H.M., Sharma, D., Sumanth Kumar, K., Venkatesh, K., Tiwari, V., Sharma, I., 2017. Influence of diurnal irradiance variation on chlorophyll values in wheat: A comparative study using different chlorophyll meters. National Academy Science Letters, 40(3), 221-224.
(XV) Nascimento, F.N., Bastos, E.A., Cardoso, M.J., Júnior, A.S.A., Ribeiro, V.Q., 2015. Parâmetros fisiológicos e produtividade de espigas verdes de milho sob diferentes lâminas de irrigação. Revista Brasileira de Milho e Sorgo, 14(2), 167-181.
(XVI) Naus, J., Prokopovs, J., Rebicek, J., Spundova, M., 2010. SPAD chlorophyll meter reading can be pronouncedly affected by chloroplast movement. Photosynthesis Research, 105(3), 265-271.
(XVII) Oliveira, T.A.S., Oliveira Neto, O.J., Silva, E.A., 2018. Influência de variáveis socioeconômicas na produção brasileira de grãos. Desafio Online, 6(3), 570-597.
(XVIII) Porra, R.J., Thompson, W.A., Kriedemann, P.E., 1989. Determination of accurate extinction coefficients and simultaneous equations for assaying chlorophylls a and b extracted with four different solvents: verification of the concentration of chlorophyll standards by atomic absorption spectroscopy. Biochimica et Biophysica Acta (BBA) - Bioenergetics, 975(3), 384-394.
(XIX) Ribeiro, A.C., Guimarães, P.T.G., Alvarez, V.H., 1999. Recomendações para o uso de corretivos e fertilizantes em Minas Gerais - 5ª aproximação. UFV, Viçosa.
(XX) Sant'ana, E.V.P., Santos, A.B., Silveira, P.M., 2010. Adubação nitrogenada na produtividade, leitura Spad e teor de nitrogênio em folhas de feijoeiro. Pesquisa Agropecuária Tropical, 40(4), 491-496.
(XXI) Silva, M.C.C., Coelho, F.S., Braun, H., Fontes, P.C.R., 2011. Índice SPAD em função de diferentes horários e posições no folíolo da batata sob fertilização nitrogenada. Revista Ciência Agronômica, 42(4), 971-977.
(XXII) Taiz, L., Zeiger, E., 2013. Fisiologia vegetal, quinta ed. Artemed, Porto Alegre.
(XXIII) Vesali, F., Omid, M., Kaleita, A., Mobli, H., 2015. Development of an android app to estimate chlorophyll content of corn leaves based on contact imaging. Computers and Electronics in Agriculture, 116(1), 211-220.
(XXIV) Yokoyama, A.H., Balbinot, J., Zucareli, C., Ribeiro, R.H., 2018. Leaf area index and SPAD during the soybean development cycle at different plant densities and their relation to grain yield. Revista de Ciências Agroveterinárias, 17(4), 531-538.
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