Estudos sobre a nutrição mineral do arroz: XIII. efeitos das deficiências de micronutrientes nas variedades IAC-25 e IAC-47

Plantas de arroz, variedades IAC-25 e IAC-47 foram cultivadas em solução nutritiva e com deficiência de B, Cu e Zn. Foram obtidos sintomas de carência dos três micronutrientes. As deficiências induzidas provocaram diminuição na matéria seca total e no número de folhas das duas variedades. O mesmo oc...

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Veröffentlicht in:Anais da Escola Superior de Agricultura Luiz de Queiroz 1981, Vol.38 (2), p.669-686
Hauptverfasser: Malavolta, E., Gomes, I.A., Cruz, A.P., Silva, J.C.A., Corrêa, L.S., Rodrigues, T.E., Daghlian, C., Guerrini, I . A., Mazza, J.A., Oliveira, F.A., Schiavuzzo, M.A., Sabino, J.C., Costa, M.P., Cabral, CP, Pavan, L.H.S., Dario, L.A., Antoniolli, F.C.
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container_issue 2
container_start_page 669
container_title Anais da Escola Superior de Agricultura Luiz de Queiroz
container_volume 38
creator Malavolta, E.
Gomes, I.A.
Cruz, A.P.
Silva, J.C.A.
Corrêa, L.S.
Rodrigues, T.E.
Daghlian, C.
Guerrini, I . A.
Mazza, J.A.
Oliveira, F.A.
Schiavuzzo, M.A.
Sabino, J.C.
Costa, M.P.
Cabral, CP
Pavan, L.H.S.
Dario, L.A.
Antoniolli, F.C.
description Plantas de arroz, variedades IAC-25 e IAC-47 foram cultivadas em solução nutritiva e com deficiência de B, Cu e Zn. Foram obtidos sintomas de carência dos três micronutrientes. As deficiências induzidas provocaram diminuição na matéria seca total e no número de folhas das duas variedades. O mesmo ocorreu no numero de perfilhos da var. IAC-47. Foi feita a determinação dos teores dos micronutrientes nas plantas submetidas aos diferentes tratamentos o que forneceu dados que ajudam a avaliação do estado nutricional. Rice plants were grown in nutrient solution lither in the presence or in the absence of B, Cu and Zn. The symptoms of deficiency were usually in agreement with those described in the literature. Growth of the variety IAC-47 (number of leaves, tillering and total dry matter) was relatively more affected; this variety, however did produce grains under the minus Cu treatment (one fourth of the yield observed in the "complete" treatment), which did not happen in the case of the other variety. At the beginning of the grain filling period the following leaf contents could be considered as indication of deficiency: B-13 to 25 ppm; Zn-20 ppm; no conclusion could be drawn with respect to Cu levels.
doi_str_mv 10.1590/S0071-12761981000200012
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A. ; Mazza, J.A. ; Oliveira, F.A. ; Schiavuzzo, M.A. ; Sabino, J.C. ; Costa, M.P. ; Cabral, CP ; Pavan, L.H.S. ; Dario, L.A. ; Antoniolli, F.C.</creator><creatorcontrib>Malavolta, E. ; Gomes, I.A. ; Cruz, A.P. ; Silva, J.C.A. ; Corrêa, L.S. ; Rodrigues, T.E. ; Daghlian, C. ; Guerrini, I . A. ; Mazza, J.A. ; Oliveira, F.A. ; Schiavuzzo, M.A. ; Sabino, J.C. ; Costa, M.P. ; Cabral, CP ; Pavan, L.H.S. ; Dario, L.A. ; Antoniolli, F.C.</creatorcontrib><description>Plantas de arroz, variedades IAC-25 e IAC-47 foram cultivadas em solução nutritiva e com deficiência de B, Cu e Zn. Foram obtidos sintomas de carência dos três micronutrientes. As deficiências induzidas provocaram diminuição na matéria seca total e no número de folhas das duas variedades. O mesmo ocorreu no numero de perfilhos da var. IAC-47. Foi feita a determinação dos teores dos micronutrientes nas plantas submetidas aos diferentes tratamentos o que forneceu dados que ajudam a avaliação do estado nutricional. 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title Estudos sobre a nutrição mineral do arroz: XIII. efeitos das deficiências de micronutrientes nas variedades IAC-25 e IAC-47
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