Relationship between forest residue management and micronutrient fertilization with eucalyptus rust severity in Eucalyptus grandis plantations

Autor(es)

Masullo, Liamara Santos ^[1] ; Ferraz, Alexandre de Vicente ^[2] ; de Moraes Goncalves, Jose Leonardo ^[1] ; Aranha Camargo, Luis Eduardo ^[1] ; de Avila, Patricia Andressa ^[1] ; Drago, Jose Renato ^[3] ; Esteves, Oscar ^[4] ; dos Santos Dias, Carlos Tadeu ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Luiz de Queiroz Coll Agr ESALQ, Piracicaba, SP - Brazil

^[2] Inst Forest Res & Study IPEF, Piracicaba, SP - Brazil

^[3] ArcelorMittal Biofiorestas LTDA, Martinho Campos, MG - Brazil

^[4] Bracell Bahia Florestal LTDA, Alagoinhas, BA - Brazil

• Tipo de documento: Artigo Científico
• Fonte: FOREST ECOLOGY AND MANAGEMENT; v. 475, NOV 1 2020.
• Citações Web of Science: 0

Resumo

The average loss of stem growth caused by eucalyptus rust (Austropuccinia psidii) is 20% in Brazil. Micronutrients can affect the defense mechanisms of plants, such as the production of lignin, phenols, phytoalexins, and other defense molecules. Micronutrients are used in several production pathways of these molecules as cofactors and enzymatic activators. The epidemiology of eucalyptus rust was studied in a Eucalyptus grandis plantation with micronutrient fertilization (B, Cu, and Zn) associated with the removal or maintenance of forest residues from wood harvest, and was compared between 6 and 12 months of age. Regardless of treatment, the loss due to rust was 60% of stem volume. The forest residue management did not affect the severity of eucalyptus rust. The omission of Zn increased the Cu foliar contents and reduced the eucalyptus rust severity. Cu leaf contents showed a strong negative correlation with rust severity. Thus, nutrition was related to the severity of eucalyptus rust, emphasizing the importance of an adequate supply of Cu to reduce the susceptibility of E. grandis. (AU)

• Processo FAPESP: 18/07294-3 - Fertilização com B, Cu e Zn associada ao manejo de resíduos florestais em plantações de eucaliptos
• Beneficiário: Liamara Santos Masullo
• Modalidade de apoio: Bolsas no Brasil - Doutorado