Release of potassium, calcium and magnesium from sugarcane straw residue under different irrigation regimes

dc.contributor.authorde Souza Junior, Jonas Pereira [UNESP]
dc.contributor.authorFlores, Rilner Alves
dc.contributor.authorPrado, Renato Mello [UNESP]
dc.contributor.authorModa, Leandro Rosatto [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade Federal de Goiás (UFG)
dc.date.accessioned2018-12-11T16:58:55Z
dc.date.available2018-12-11T16:58:55Z
dc.date.issued2015-01-01
dc.description.abstractThe sugarcane straw deposited in soil after mechanized harvest can be a valuable source of nutrients. The aim of this research was to estimate the nutrient release from sugarcane straw, under different irrigation regimes and duration of decomposition. The experiment was conducted in a glasshouse using 57 g of sugarcane straw, which represented a total of 10t ha-1 of straw. The straw was placed in bags made of plastic screen (mesh size 1.8mm). These bags were arranged inside the trays (total area of 567 cm2) filled with 2 dm3 of Oxisol. Experiments were designed according to randomized complete split plot: three water irrigation levels (450 mm, 900 mm and 1340 mm of water), ten sampling periods (0, 15, 30, 60, 90, 150, 180, 240, 300 and 360 days after the experiment installation), and three replicates. The dry matter accumulated from the straw subjected to decomposition, and the quantities of released calcium (Ca), magnesium (Mg) and potassium (K) were evaluated over 360 days. Sugarcane total dry mass decreased by 46% during the experiment. The nutrient release rate of potassium was 88.8%, 90.45 and 93.6% at irrigation regimes 450 mm, 900 mm and 1340 mm respectively, of calcium: 70.1%, 70.7% and 74.8% at 450 mm, 900 mm and 1340 mm respectively, of magnesium: 49.6%, 60.4% and 61.4% at 450 mm, 900 mm and 1340 mm respectively. Therefore, in regions with large amount of rainfall K application to sugarcane crop can be reduced because this nutrient can be partially supplied from the decomposed straw.en
dc.description.affiliationUniversidade Estadual Paulista Júlio Mesquita Filho (UNESP), Faculdade de Ciências Agrárias e Veterinárias - Câmpus Jaboticabal, Departamento de Solos e Adubos
dc.description.affiliationUniversidade Federal de Goiás, Escola de Agronomia - Câmpus Samambaia
dc.description.affiliationUnespUniversidade Estadual Paulista Júlio Mesquita Filho (UNESP), Faculdade de Ciências Agrárias e Veterinárias - Câmpus Jaboticabal, Departamento de Solos e Adubos
dc.format.extent767-771
dc.identifier.citationAustralian Journal of Crop Science, v. 9, n. 8, p. 767-771, 2015.
dc.identifier.issn1835-2707
dc.identifier.issn1835-2693
dc.identifier.scopus2-s2.0-84944873681
dc.identifier.urihttp://hdl.handle.net/11449/172145
dc.language.isoeng
dc.relation.ispartofAustralian Journal of Crop Science
dc.relation.ispartofsjr0,354
dc.relation.ispartofsjr0,354
dc.rights.accessRightsAcesso restrito
dc.sourceScopus
dc.subjectMechanized harvest
dc.subjectPlant nutrition
dc.subjectPotassium
dc.subjectPrecipitation
dc.subjectSaccarum officinarum
dc.titleRelease of potassium, calcium and magnesium from sugarcane straw residue under different irrigation regimesen
dc.typeArtigo
unesp.departmentSolos e Adubos - FCAVpt

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