FundaÃÃo de Amparo à Pesquisa do Estado do Cearà / O mamoeiro à uma planta de rÃpido crescimento e produÃÃo contÃnua e por isso, necessita de uma nutriÃÃo balanceada. Nesta pesquisa foram feitos trÃs experimentos em condiÃÃes de campo, em AcaraÃ, CE, com o objetivo de avaliar o crescimento, a produtividade e a composiÃÃo mineral do mamoeiro, decorrentes de doses de B, P e Zn. No primeiro experimento, os tratamentos foram constituÃdos em esquema fatorial 4 x 4 + 1, sendo quatro doses de B (0,5; 1,0; 2,0 e 4,0 kg ha-1) e quatro parcelamentos (P1 = 100% da adubaÃÃo com B aos 30 dias apÃs o plantio (DAP); P2 = 50% aos 30 DAP e 50% aos 180 DAP; P3 = 50% aos 30 DAP, 25% aos 90 DAP e 25% aos 180 DAP; e P4 = 100% aos 180 DAP), mais um controle (0 kg ha-1 de B), em delineamento experimental de blocos ao acaso, com quatro repetiÃÃes. No segundo experimento, os tratamentos foram constituÃdos em esquema fatorial 3 x 3 + 1, sendo trÃs doses de P2O5 (100; 200 e 300 kg ha-1) e trÃs parcelamentos (P1 = 100% da adubaÃÃo com P no plantio; P2 = 50% no plantio e 50% aos 180 DAP e P3 = 50% no plantio, 25% aos 90 DAP e 25% aos 180 DAP), mais um controle (0 kg ha-1 de P2O5), em delineamento experimental de blocos ao acaso, com trÃs repetiÃÃes. Jà no terceiro experimento, os tratamentos foram constituÃdos de seis doses de Zn (7,8; 9,8; 11,8; 13,8; 15,8 e 19,8 kg ha-1), em delineamento experimental de blocos ao acaso, com trÃs repetiÃÃes. Foram avaliadas a altura da planta e a circunferÃncia do caule aos 180 DAP; os teores de B, P e Zn no pecÃolo foliar aos 210 e 360 DAP e no fruto aos 240 DAP e o rendimento dos mamoeiros entre 210 e 360 DAP. Os dados experimentais foram submetidos à anÃlise de variÃncia pelo teste F. Para as doses de B, P e Zn foram ajustadas as equaÃÃes de regressÃes e para os parcelamentos de B e P foram aplicados os testes de Tukey. O crescimento, os teores de B, P e Zn no pecÃolo foliar e o rendimento foram afetados pelas doses B, P e Zn. Os mÃximos rendimentos foram alcanÃados nas doses de 2 kg ha-1 de B, 160 kg ha-1 de P2O5 e 10 kg ha-1 de Zn. Jà os teores no pecÃolo foliar relacionados à mÃxima produtividade foram de 22 mg kg-1 de B, 1,9 g kg-1 de P e 12 mg kg-1 de Zn aos 210 DAP. / Papaya is a plant of rapid growth and continuous production and therefore requires a balanced nutrition. In this research three experiments were made under field conditions in AcaraÃ, CE, aiming to evaluate the growth, yield and mineral composition of the papaya plant stemming doses of B, P and Zn. In the first experiment, the treatments were arranged in factorial 4 x 4 + 1, being four B doses (0.5, 1.0, 2.0 and 4.0 kg ha-1) and four installments (P1 = 100 % of B fertilization at 30 days after planting (DAP), P2 = 50% at 30 DAP and 50% at 180 DAP; P3 = 50% at 30 DAP, 25% at 90 DAP and 25% at 180 DAP, and P4 = 100% to 180 DAP), plus a control (0 kg ha-1 B), in experimental design of randomized blocks with four replications. In the second experiment, the treatments were in a factorial 3 x 3 + 1, three P2O5 doses (100, 200 and 300 kg ha-1) and three installments (P1 = 100% of P fertilization at planting; P2 = 50% at planting and 50% at 180 DAP and P3 = 50% at planting, 25% at 90% DAP and 25% at 180 DAP), plus a control (0 kg ha-1 P2O5) in experimental design of randomized blocks with three replications. In the third experiment, treatments consisted of six Zn doses (7.8, 9.8, 11.8, 13.8, 15.8 and 19.8 kg ha-1) in experimental design of randomized blocks with three replications. Were evaluated plant height and girth stem at 180 DAP; B, P and Zn concentrations in the petiole leaf at 210 and 360 DAP and in the fruit at 240 DAP and the yield of papaya trees between 210 and 360 DAP. The experimental data were subjected to analysis of variance by F-test. To the B, P and Zn doses were adjusted regression equations and the B and P installments were applied Tukey test. The growth, the B, P and Zn concentration in the petiole leaf and the yield were affected by B, P and Zn doses. The maximum yields were achieved at doses 2 kg ha-1 of B, 160 kg ha-1 of P2O5 and 10 kg ha-1 of Zn. Already the B, P and Zn concentration in the petioles related maximum yield was 22 mg kg-1, 1.9 g kg-1 and 12 mg kg-1 at 210 DAP, respectively.
| Identifer | oai:union.ndltd.org:IBICT/oai:www.teses.ufc.br:9463 |
| Date | 25 July 2014 |
| Creators | FabrÃcio Ferreira Lima |
| Contributors | MÃrcio Cleber de Medeiros CorrÃa, Ismail Soares, JÃlio CÃsar do Vale Silva, Lindbergue Araujo Crisostomo, Walter Esfrain Pereira |
| Publisher | Universidade Federal do CearÃ, Programa de PÃs-GraduaÃÃo em Agronomia/Fitotecnia, UFC, BR |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/doctoralThesis |
| Format | application/pdf |
| Source | reponame:Biblioteca Digital de Teses e Dissertações da UFC, instname:Universidade Federal do Ceará, instacron:UFC |
| Rights | info:eu-repo/semantics/openAccess |
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