BIORREGULADORES NA MORFOLOGIA E NA PRODUTIVIDADE DE FRUTOS DE TOMATEIRO CULTIVAR ÂNGELA GIGANTE
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Data
1997-01-01
Autores
MARTINS, MARIA BERNARDETE GONÇALVES [UNESP]
CAMARGO E CASTRO, PAULO ROBERTO DE
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Instituto Agronômico de Campinas
Resumo
O presente trabalho teve como finalidade observar aspectos morfológicos dos frutos de tomateiro, Lycopersicon esculentum Mill. cv. Ângela Gigante, submetidos à ação de biorreguladores, com ou sem adubação adicional, e determinar as possíveis alterações na produtividade. Foram desenvolvidos, em casa de vegetação, em épocas distintas, dois ensaios. As mudas foram selecionadas e transplantadas para vasos com capacidade de 12 L de terra, contendo uma mistura de solo argiloso, areia, matéria orgânica e uma adubação mineral complementar de N, P, K. No segundo ensaio, após o transplante das mudas, além da adubação mineral complementar de N, P, K, efetuaram-se adubações adicionais (fertirrigação). em ambos os ensaios, quando as plantas atingiram quatro folhas definitivas, realizaram-se as pulverizações com GA3 50 mg/L; NAA 100 mg/L; CCC 1.500 mg/L e SADH 3.000 mg/L. Realizaram-se, nos dois ensaios, quatro coletas de frutos maduros por planta. de modo geral, para o primeiro, o tratamento com CCC mostrou tendência em aumentar o número e a massa total de frutos por planta em relação à testemunha e aos demais tratamentos, enquanto o tratamento com NAA obteve efeito contrário. O ensaio com fertirrigação adicional não provocou alterações significativas na produção de frutos; no entanto, no tratamento com SADH, ocorreu maior incidência de anomalias. O tratamento com GA3 ocasionou, em alguns frutos, a maturação precoce da placenta em relação ao pericarpo e eventuais formações de frutos geminados. Não se observaram diferenças morfológicas significativas em relação ao comprimento e ao diâmetro médio de frutos provenientes do primeiro ensaio, porém frutos de plantas tratadas com CCC e de plantas testemunha, provindos do segundo ensaio, mostraram maior diâmetro.
The objective of the present work was to observe some morphological aspects of the fruits of Lycopersicon esculentum Mill. cv. Ângela Gigante, treated with plant growth regulators, with or without additional fertilizers, as well to determine the effects on the productivity. Two assays were conducted in the greenhouse: (1) in the first, the seedlings were selected and transferred to 12 L capacity pots, containing a mixture of clayey soil, sand, organic matter and a complementary N, P, K mineral fertilizing; (2) in the second after the seedling transfer, besides the N, P, K fertilizing, a supplementary fertirrigation was carried out with the objective of verifying the effect on fruit production. In both assays after the plants had developed four definitive leaves, they were sprayed with GA3 50 mg/L; NAA 100 mg/L; CCC 1,500 mg/L and SADH 3,000 mg/L. Four fruit harvests per plant were carried out in both assays. The treatment with CCC without fertirrigation, tended to increase the number and the total weight of ripe fruits per plant in each of the four harvests. The additional fertirrigation did not change significantly fruit yield in the different treatments, when compared to the control. The treatment with GA3 induced early maturation of placenta in relation to the pericarp. Geminated fruits were observed in plants treated with growth promoters and the formation of anomalous fruits in those treated with growth retardants.
The objective of the present work was to observe some morphological aspects of the fruits of Lycopersicon esculentum Mill. cv. Ângela Gigante, treated with plant growth regulators, with or without additional fertilizers, as well to determine the effects on the productivity. Two assays were conducted in the greenhouse: (1) in the first, the seedlings were selected and transferred to 12 L capacity pots, containing a mixture of clayey soil, sand, organic matter and a complementary N, P, K mineral fertilizing; (2) in the second after the seedling transfer, besides the N, P, K fertilizing, a supplementary fertirrigation was carried out with the objective of verifying the effect on fruit production. In both assays after the plants had developed four definitive leaves, they were sprayed with GA3 50 mg/L; NAA 100 mg/L; CCC 1,500 mg/L and SADH 3,000 mg/L. Four fruit harvests per plant were carried out in both assays. The treatment with CCC without fertirrigation, tended to increase the number and the total weight of ripe fruits per plant in each of the four harvests. The additional fertirrigation did not change significantly fruit yield in the different treatments, when compared to the control. The treatment with GA3 induced early maturation of placenta in relation to the pericarp. Geminated fruits were observed in plants treated with growth promoters and the formation of anomalous fruits in those treated with growth retardants.
Descrição
Palavras-chave
tomateiro, Lycopersicon esculentum Mill., reguladores vegetais, produção, tomato plant, Lycopersicon esculentum Mill., plant growth regulators, production
Como citar
Bragantia. Instituto Agronômico de Campinas, v. 56, n. 2, p. 237-248, 1997.