Organic and inorganic forms of phosphorus in soils amended with sugar cane filter cake

Autor(es)

Braos, Lucas Boscov ^[1] ; Bettiol, Aline Carla Trombeta ^[1] ; Di Santo, Ludmilla Geraldo ^[2] ; Ferreira, Manoel Evaristo ^[1] ; da Cruz, Mara Cristina Pessoa ^[1]

Afiliação do(s) autor(es)

^[1] UNESP Univ Estadual Paulista, Fac Ciencias Agr & Vet, Dept Solos & Adubos, Via Acesso Prof Paulo Donato Castellane S-N, BR-14884900 Jaboticabal - Brazil

^[2] UNESP Univ Estadual Paulista, Fac Ciencias Agr & Vet, Dept Clin & Cirurgia Vet, Jaboticabal - Brazil

• Tipo de documento: Artigo Científico
• Fonte: SOIL USE AND MANAGEMENT; v. 37, n. 3, p. 449-459, JUL 2021.
• Citações Web of Science: 0

Resumo

Studies of phosphorus (P) behaviour in soils receiving sugar cane filter cake are important for determining doses, its contribution to P nutrition and maximizing fertilizer efficiency, especially in soils with low P availability. This study aimed to assess organic and inorganic forms of P in soils treated with sugar cane filter cake, and the relationship between these and plant available P. Soil inorganic (P-i) and organic (P-o) phosphorus forms, organic carbon, pH and resin P were measured in two soils; a Typic Hapludox with clay texture and an Arenic Hapludult with loamy sand texture, subject to three fertilizer treatments (nil P control and 100 mg P dm(-3)as filter cake and triple superphosphate). Inorganic P was fractionated to soluble/loosely bound, Al-bound, Fe-bound, occluded and Ca-bound P forms. Organic P was fractionated into labile, fulvic, humic and residual P(o)forms. Plant dry matter yield and P uptake were also determined. Both fertilizers increased the Al- and Fe-bound P fractions, with the increases caused by triple superphosphate 14.7 and 7.2 mg kg(-1)higher than filter cake, respectively. Filter cake increased the fulvic P(o)by 40.9 mg kg(-1), while triple superphosphate increased it by 28.5 mg kg(-1), in the fine-textured soil. Al-, Fe-bound and labile P(o)fractions in both soils had significant correlations (p <. 01) with plant absorbed P (r = .75, .84 and .54, respectively). Filter cake resulted in lower P(i)fractions and availability, and it has potential to partially replace mineral P fertilizer in fine-textured soils and, entirely, in coarse-textured soils. (AU)

• Processo FAPESP: 14/11466-3 - Formas orgânicas e inorgânicas de fósforo em solos tratados com resíduosorgânicos e relações com disponibilidade
• Beneficiário: Lucas Boscov Braos
• Modalidade de apoio: Bolsas no Brasil - Doutorado