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dc.contributor.authorSANTIN, D.pt_BR
dc.contributor.authorBENEDETTI, E. L.pt_BR
dc.contributor.authorBARROS, N. F. dept_BR
dc.contributor.authorALMEIDA, I. C. dept_BR
dc.contributor.authorLEAL, G. P.pt_BR
dc.contributor.authorFONTES, L.pt_BR
dc.contributor.authorNEVES, J. C. L.pt_BR
dc.contributor.authorWENDLING, I.pt_BR
dc.contributor.authorREISSMANN, C. B.pt_BR
dc.date.accessioned2014-12-23T11:11:11Zpt_BR
dc.date.available2014-12-23T11:11:11Zpt_BR
dc.date.created2014-12-23pt_BR
dc.date.issued2014pt_BR
dc.identifier.citationRevista Brasileira de Ciência do Solo, v. 38, p. 1469-1477, 2014.pt_BR
dc.identifier.urihttp://www.alice.cnptia.embrapa.br/alice/handle/doc/1003635pt_BR
dc.descriptionYerba mate (Ilex paraguariensis) is a tree species native to the subtropical regions of South America, and is found in Brazil predominantly in the southern region. Despite the historical importance in this region, so far, studies on crop nutrition to improve yields are scarce. Thus, this study evaluated the effect of potassium rates on K soil availability, and the yield and nutritional status of yerba mate. The experiment was conducted in São Mateus do Sul, State of Paraná, on a Humox soil, where K2O rates of 0, 20, 40, 80, 160, and 320 kg ha-1 were tested on 7-year-old plantations. The experiment was harvested 24 months after installation by removing approximately 95 % of the canopy that had sprouted from the previous harvest. The soil was evaluated for K availability in the layers 0-10, 0-20, 10-20, and 20-40 cm. The plant parts leaf fresh matter (LM), twigs (TW), thick branches (BR) and commercial yerba mate (COYM), i.e., LM+TW, were analyzed. In addition, the relationship between fresh matter/dry matter (FM/DM) and K concentration in LM, AG and BR were evaluated. The fertilization increased K availability in all evaluated soil layers, indicating good mobility of the nutrient even at low rates. Yerba mate responded positively to increasing K2O rates with higher yields of all harvested components. The crop proved K-demanding, with a maximum COYM yield of 28.5 t ha-1, when 72 mg dm-3 K was available in the 0-20 cm layer. Yerba mate in the plant production stage requires soil K availability at medium to high level; in clayey soil with low K availability, a rate of 300 kg ha-1 K2O should be applied at 24 month intervals to obtain high yields. A leaf K concentration of 16.0 g ha-1 is suitable for yerba mate in the growth stage.pt_BR
dc.language.isoengeng
dc.rightsopenAccesseng
dc.subjectErva-matept_BR
dc.subjectEspécie arbóreapt_BR
dc.titleEffect of potassium fertilization on yield and nutrition of yerba mate (Ilex paraguariensis).pt_BR
dc.typeArtigo de periódicopt_BR
dc.date.updated2014-12-23T11:11:11Zpt_BR
dc.subject.thesagroEspécie Nativapt_BR
dc.subject.thesagroFertilidade do Solopt_BR
dc.subject.thesagroIlex Paraguariensispt_BR
dc.subject.thesagroPotássiopt_BR
riaa.ainfo.id1003635pt_BR
riaa.ainfo.lastupdate2014-12-23pt_BR
dc.contributor.institutionDelmar Santin, Pós doutorando UFSC; Eliziane Luiza Benedetti, IFSC; Nairam Félix de Barros, UFV; Igor Carvalho de Almeida, UFV; Greice Pereira Leal, ESALQ/USP; Lucas Fontes, UFV; Júlio César Lima Neves, UFV; IVAR WENDLING, CNPF; Carlos Bruno Reissmann, UFPR.pt_BR
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