Sewage Sludge Application in Eucalyptus urograndis Plantation: Availability of Phosphorus in Soil and Wood Production

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Abreu-Junior, Cassio Hamilton ^[1] ; de Oliveira, Marcelo Gomes ^[1] ; Silveira Cardoso, Paulo Henrique ^[1] ; Mandu, Thays da Silva ^[1] ; Florentino, Antonio Leite ^[2] ; Oliveira, Fernando Carvalho ^[3] ; dos Reis, Josimar Vieira ^[2] ; Alvares, Clayton Alcarde ^[4] ; Stape, Jose Luiz ^[4] ; Rodrigues Nogueira, Thiago Assis ^[5] ; Capra, Gian Franco ^{[6, 7]} ; He, Zhenli ^[8]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Ctr Nucl Energy Agr, Piracicaba - Brazil

^[2] Univ Sao Paulo, Luiz de Queiroz Coll Agr, Piracicaba - Brazil

^[3] Biossolo Agr & Ambiente SS, Aracicaba - Brazil

^[4] Suzano SA Co, Limeira - Brazil

^[5] Sao Paulo State Univ, Dept Plant Protect Rural Engn & Soils, Ilha Solteira - Brazil

^[6] Univ Sassari, Dipartimento Architettura Design & Urbanist, Nuoro - Italy

^[7] Univ Sassari, Desertificat Res Ctr, Sassari - Italy

^[8] Univ Florida, Inst Food & Agr Sci, Indian River Res & Educ Ctr, Ft Pierce, FL - USA

• Tipo de documento: Artigo Científico
• Fonte: FRONTIERS IN ENVIRONMENTAL SCIENCE; v. 8, JUL 28 2020.
• Citações Web of Science: 0

Resumo

Phosphate fertilizers used in planted forests mainly come from scarce and non-renewable sources, and there is a need for new sources of phosphorus (P). An alternative is the use of sewage sludge (SS), rich in organic matter, nitrogen, and P. The objectives were to evaluate the soil P availability and its effect on wood production in 22-month-old Eucalyptus urograndis plantation treated with SS. A field experiment was set up in a randomized complete block design, four replicates, with the following treatments: control without fertilization; mineral fertilization (MF); 14.5 Mg ha(-1) of SS + 22 kg ha(-1) of P (S1P1); 29 Mg ha(-1) of SS (S2); 29 Mg ha(-1) of SS + 17.5 kg ha(-1)of P (S2P2); and 43.5 Mg ha(-1) of SS (S3), dry base. Of the total P in SS, 65% was in organic form and 42% was in labile + moderately labile forms. S2P2 and S3 positively altered the pattern of soil P distribution, with more P in the labile and moderately labile fractions than in the non-labile fraction, along 0-20 cm depths, than MF and control. There were higher microbial and available P as a function of SS dose. Wood volume and biomass were highly related to soil P availability as a function of SS dose. Within the SS treatments, S2P2 resulted in higher gains of volume and biomass of wood. The SS application at the recommend rate, supplemented with 66% of recommended P fertilizer dose in Eucalyptus plantations, can reduce the use of P fertilizer by 33% and N fertilizer by 100% and maintain comparable soil P availability and wood production. (AU)

• Processo FAPESP: 17/26375-1 - Inclusão de elementos tóxicos nas funções dris e cnd para avaliação do estado nutricional de eucalipto
• Beneficiário: Paulo Henrique Silveira Cardoso
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 04/15097-0 - Uso agrícola de lodo de esgoto em sistema florestal para produção de eucaliptos
• Beneficiário: Cassio Hamilton Abreu Junior
• Modalidade de apoio: Auxílio à Pesquisa - Regular