Publicação: Considerations for unharvested plant potassium
dc.contributor.author | Rosolem, Ciro A. [UNESP] | |
dc.contributor.author | Mallarino, Antonio P. | |
dc.contributor.author | Nogueira, Thiago A.R. [UNESP] | |
dc.contributor.institution | Universidade Estadual Paulista (UNESP) | |
dc.contributor.institution | Iowa State University | |
dc.date.accessioned | 2023-07-29T12:55:08Z | |
dc.date.available | 2023-07-29T12:55:08Z | |
dc.date.issued | 2020-12-14 | |
dc.description.abstract | Potassium (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.affiliation | School of Agricultural Sciences São Paulo State University | |
dc.description.affiliation | Department of Agronomy Iowa State University | |
dc.description.affiliation | School of Engineering São Paulo State University | |
dc.description.affiliationUnesp | School of Agricultural Sciences São Paulo State University | |
dc.description.affiliationUnesp | School of Engineering São Paulo State University | |
dc.format.extent | 147-162 | |
dc.identifier | http://dx.doi.org/10.1007/978-3-030-59197-7_6 | |
dc.identifier.citation | Improving Potassium Recommendations for Agricultural Crops, p. 147-162. | |
dc.identifier.doi | 10.1007/978-3-030-59197-7_6 | |
dc.identifier.scopus | 2-s2.0-85149508704 | |
dc.identifier.uri | http://hdl.handle.net/11449/246954 | |
dc.language.iso | eng | |
dc.relation.ispartof | Improving Potassium Recommendations for Agricultural Crops | |
dc.source | Scopus | |
dc.subject | Cover crops | |
dc.subject | K cycling | |
dc.subject | K management | |
dc.subject | Plant residues | |
dc.title | Considerations for unharvested plant potassium | en |
dc.type | Capítulo de livro | |
dspace.entity.type | Publication |