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Publicação:
Considerations for unharvested plant potassium

dc.contributor.authorRosolem, Ciro A. [UNESP]
dc.contributor.authorMallarino, Antonio P.
dc.contributor.authorNogueira, Thiago A.R. [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.contributor.institutionIowa State University
dc.date.accessioned2023-07-29T12:55:08Z
dc.date.available2023-07-29T12:55:08Z
dc.date.issued2020-12-14
dc.description.abstractPotassium (K) is found in plants as a free ion or in weak complexes. It is easily released from living or decomposing tissues, and it should be considered in fertilization programs. Several factors affect K cycling in agroecosystems, including soil and fertilizer K contributions, plant K content and exports, mineralization rates from residues, soil chemical reactions, rainfall, and time. Soil K+ ions can be leached, remain as exchangeable K, or migrate to non-exchangeable forms. Crop rotations that include vigorous, deep-rooted cover crops capable of exploring non-exchangeable K in soil are an effective strategy for recycling K and can prevent leaching below the rooting zone in light-textured soils. The amount of K released by cover crops depends on biomass production. Potassium recycled with non-harvested components of crops also varies greatly. Research with maize, soybean, and wheat has shown that 50-60% of K accumulated in vegetative tissues is released within 40-45 days. A better understanding of K cycling would greatly improve the efficacy of K management for crop production. When studying K cycling in agricultural systems, it is important to consider: (1) K addition from fertilizers and organic amendments; (2) K left in residues; (3) K partitioning differences among species; (4) soil texture; (5) soil pools that act as temporary sources or sinks for K. In this chapter, the role of cash and cover crops and organic residues on K cycling are explored to better understand how these factors could be integrated into making K fertilizer recommendations.en
dc.description.affiliationSchool of Agricultural Sciences São Paulo State University
dc.description.affiliationDepartment of Agronomy Iowa State University
dc.description.affiliationSchool of Engineering São Paulo State University
dc.description.affiliationUnespSchool of Agricultural Sciences São Paulo State University
dc.description.affiliationUnespSchool of Engineering São Paulo State University
dc.format.extent147-162
dc.identifierhttp://dx.doi.org/10.1007/978-3-030-59197-7_6
dc.identifier.citationImproving Potassium Recommendations for Agricultural Crops, p. 147-162.
dc.identifier.doi10.1007/978-3-030-59197-7_6
dc.identifier.scopus2-s2.0-85149508704
dc.identifier.urihttp://hdl.handle.net/11449/246954
dc.language.isoeng
dc.relation.ispartofImproving Potassium Recommendations for Agricultural Crops
dc.sourceScopus
dc.subjectCover crops
dc.subjectK cycling
dc.subjectK management
dc.subjectPlant residues
dc.titleConsiderations for unharvested plant potassiumen
dc.typeCapítulo de livro
dspace.entity.typePublication

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