Interação entre manejo de plantas daninhas e adubação de cobertura no crescimento inicial de Eucalyptus grandis x E. urophylla
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Data
2012-10-01
Autores
Pereira, Fernanda Campos Mastrotti [UNESP]
Yamauti, Micheli Satomi [UNESP]
Alves, Pedro Luis da Costa Aguiar [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Sociedade de Investigações Florestais
Resumo
Diante da crescente necessidade de realização de boas técnicas de manejo florestal, foi conduzido um experimento de campo com o objetivo de avaliar a possível interação entre o manejo de plantas daninhas e a adubação de cobertura no desenvolvimento de plantas de eucalipto. Os tratamentos foram dispostos em blocos ao acaso, em esquema fatorial 5x3, constituído de cinco situações de controle das plantas daninhas (testemunha no mato; testemunha limpa; isoxaflutole; glyphosate; isoxaflutole+glyphosate - em pré e pós- emergência, respectivamente) e três doses de adubação de cobertura (0,5 x; x; e 1,5 x, em que x corresponde à dose recomendada para adubação da cultura). No tricentésimo dia após o plantio do eucalipto, a massa de matéria seca de folhas e a massa de matéria seca de caule foram as características mais sensíveis à interferência das plantas daninhas. Quando em convivência com essas plantas, as doses de adubação de cobertura não promoveram grandes alterações nas variáveis supracitadas, indicando a competição da cultura com as plantas daninhas pelo recurso oferecido. Já nos tratamentos que ficaram livres da convivência com as plantas daninhas por todo o período avaliado (testemunha limpa) ou por grande parte dele (isoxaflutole + glyphosate), a maior dose de adubação de cobertura foi responsável pelos maiores valores de massa de matéria seca de folhas e caule.
Because of the increasing need for achievement of good forest management techniques, it was conducted at field, an experiment to evaluate the possible interaction between weed management and covering fertilization in the development of eucalyptus plants. The treatments were arranged in a randomized block design in a 5x3 factorial design, consisting of five cases of weed control (weeded, weed free; isoxaflutole; glyphosate; glyphosate + isoxaflutole - pre and post emergence, respectively) and three doses of covering fertilization (0.5 x, x, 1.5 x, where x corresponds to the dose recommended for crop fertilization). At 300 days after planting, eucalyptus leaf dry mass and dry mass of stem were the most sensitive traits to weed interference. When the eucalyptus plants are grown with the weeds, the doses of covering fertilization did not promote significant changes in these traits, indicating the competition of the culture with weeds by the feature offered. Since the treatments that were free from growing with weeds throughout the study period (clean control and isoxaflutole + glyphosate), the highest dose of covering fertilization was responsible for the bests values of leaves and stem dry mass.
Because of the increasing need for achievement of good forest management techniques, it was conducted at field, an experiment to evaluate the possible interaction between weed management and covering fertilization in the development of eucalyptus plants. The treatments were arranged in a randomized block design in a 5x3 factorial design, consisting of five cases of weed control (weeded, weed free; isoxaflutole; glyphosate; glyphosate + isoxaflutole - pre and post emergence, respectively) and three doses of covering fertilization (0.5 x, x, 1.5 x, where x corresponds to the dose recommended for crop fertilization). At 300 days after planting, eucalyptus leaf dry mass and dry mass of stem were the most sensitive traits to weed interference. When the eucalyptus plants are grown with the weeds, the doses of covering fertilization did not promote significant changes in these traits, indicating the competition of the culture with weeds by the feature offered. Since the treatments that were free from growing with weeds throughout the study period (clean control and isoxaflutole + glyphosate), the highest dose of covering fertilization was responsible for the bests values of leaves and stem dry mass.
Descrição
Palavras-chave
Eucalyptus sp., glyphosate, Isoxaflutole, Eucalyptus sp., Glyphosate, Isoxaflutole
Como citar
Revista Árvore. Sociedade de Investigações Florestais, v. 36, n. 5, p. 941-950, 2012.