Efeitos da aplicação de zinco no desenvolvimento, no estado nutricional e na produção de matéria seca de mudas de maracujazeiro
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Data
2004-08-01
Autores
Natale, William [UNESP]
Prado, Renato de Mello [UNESP]
Leal, Renata Moreira [UNESP]
Franco, Claudenir Facincani [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Sociedade Brasileira de Fruticultura
Resumo
Sabe-se que os solos das regiões tropicais, devido ao intemperismo, apresentam baixas concentrações de micronutrientes, especialmente zinco. Desse modo, objetivou-se avaliar a aplicação de zinco ao substrato de produção de mudas de maracujazeiro, acompanhando seus efeitos no desenvolvimento, no estado nutricional e na produção de matéria seca das plantas. O delineamento experimental foi em blocos ao acaso, com cinco tratamentos e quatro repetições. As doses de zinco, na forma de sulfato de zinco, foram: 0; 2; 4; 6 e 8 mg de Zn dm-3 de solo. As mudas receberam doses de N, P, K e B de 300; 450; 150 e 0,5 mg dm-3, respectivamente, sendo o N e o K parcelados em três vezes (15; 30 e 45 dias após a semeadura). O experimento foi conduzido em condições de casa de vegetação, em vasos com 2 dm³ de substrato de um Latossolo Vermelho distrófico. Após 70 dias do plantio, avaliaram-se: o diâmetro do caule, a altura, a área foliar e a matéria seca da parte aérea e das raízes, bem como os teores de macro e micronutrientes. As mudas de maracujazeiro responderam positivamente à aplicação de zinco. O maior desenvolvimento das mudas esteve associado à dose de 5 mg de Zn dm-3.
The subsoil normally used for passion fruit cuttings production presents low concentration of Zn. Considering the inexistence of information on the subject, it was looked to evaluate the effect of the zinc application in the substratum of production of the passion fruit cuttings and, to follow the effect in the development, the production of dry matter and the nutrition status of the plants. The experimental design used was randomized blocks with 5 treatments and 4 replications. The doses of zinc were: 0; 2; 4; 6 and 8 mg dm-3 of Zn. All the plants received constant doses of N, P, K and B of 300; 100; 150 and 0.5 mg dm-3 of Zn respectively. The experiment was lead in vases with 2 dm³ of substratum of a Red Latosol (Oxisol). After 70 days of the plantation, were evaluated: height, foliar area, dry matter, nutritional status of plants and soil nutrients. The passion fruit had answered positively to the zinc application. The biggest development of the plants was associated with the 5 mg dm-3 of Zn dose.
The subsoil normally used for passion fruit cuttings production presents low concentration of Zn. Considering the inexistence of information on the subject, it was looked to evaluate the effect of the zinc application in the substratum of production of the passion fruit cuttings and, to follow the effect in the development, the production of dry matter and the nutrition status of the plants. The experimental design used was randomized blocks with 5 treatments and 4 replications. The doses of zinc were: 0; 2; 4; 6 and 8 mg dm-3 of Zn. All the plants received constant doses of N, P, K and B of 300; 100; 150 and 0.5 mg dm-3 of Zn respectively. The experiment was lead in vases with 2 dm³ of substratum of a Red Latosol (Oxisol). After 70 days of the plantation, were evaluated: height, foliar area, dry matter, nutritional status of plants and soil nutrients. The passion fruit had answered positively to the zinc application. The biggest development of the plants was associated with the 5 mg dm-3 of Zn dose.
Descrição
Palavras-chave
Zn, Passion fruit, Passiflora edulis, Nutrition, Micronutrient, Zn, maracujazeiro, Passiflora edulis, Nutrição, micronutriente
Como citar
Revista Brasileira de Fruticultura. Sociedade Brasileira de Fruticultura, v. 26, n. 2, p. 310-314, 2004.