NUTRITIONAL STATUS AND DRY MASS PRODUCTION OF ALFALFA IN FUNCTION OF POTASSIUM RATES IN TWO SOILS

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dc.contributor.authorOrioli Junior, Valdeci
dc.contributor.authorMendes Coutinho, Edson Luiz [UNESP]
dc.contributor.authorCoutinho Neto, Andre Mendes [UNESP]
dc.contributor.authorCardoso, Saulo Strazeio [UNESP]
dc.contributor.institutionInst Fed Triangulo Mineiro
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2015-03-18T15:56:54Z
dc.date.available2015-03-18T15:56:54Z
dc.date.issued2014-06-01
dc.description.abstractPotassium fertilization is very important to alfalfa crop in terms of yield, quality and persistence of forage, especially on soils naturally poor K. Thus, to assess the effects of K fertilization in alfalfa production and nutritional status, was carried out an experiment in a greenhouse using samples of a Dystrophic Oxisol medium texture (LV) (0.6 mmol(c) dm(-3) K) and a Dystrophic Ultisol sandy/medium texture (PVA) (2.2 mmol(c) dm(-3) K). A completely randomized design in a factorial arrangement 6 x 2 (six K rates and two soils) was used, with four replications. The K rates used were: 0, 25, 50, 100, 150 and 200 mg kg(-1) K. Potassium fertilization increased K content in soil and shoots. Dry matter production was increased with the K addition. However, in the PVA, this occurred only in the second cut. In LV, potassium fertilization increased N concentration in alfalfa shoots in both cuts. Plants with K concentration around 10 g kg(-1) had typical symptoms of this nutrient deficiency. The K critical levels of K in soil and shoots were 1.8 mmolc dm(-3) and 16.7 g kg(-1), respectively.en
dc.description.affiliationInst Fed Triangulo Mineiro, Uberaba, MG, Brazil
dc.description.affiliationUniv Estadual Paulista, UNESP, Fac Ciencias Agr & Vet, Dept Solos & Adubos, Jaboticabal, SP, Brazil
dc.description.affiliationFCAV UNESP, Jaboticabal, SP, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, UNESP, Fac Ciencias Agr & Vet, Dept Solos & Adubos, Jaboticabal, SP, Brazil
dc.description.affiliationUnespFCAV UNESP, Jaboticabal, SP, Brazil
dc.format.extent31-38
dc.identifierhttp://www.seer.ufu.br/index.php/biosciencejournal/article/view/14111/14477
dc.identifier.citationBioscience Journal. Uberlandia: Univ Federal Uberlandia, v. 30, n. 3, p. 31-38, 2014.
dc.identifier.fileWOS000339322000004.pdf
dc.identifier.issn1981-3163
dc.identifier.lattes6726578534593471
dc.identifier.urihttp://hdl.handle.net/11449/117778
dc.identifier.wosWOS:000339322000004
dc.language.isopor
dc.publisherUniv Federal Uberlandia
dc.relation.ispartofBioscience Journal
dc.relation.ispartofjcr0.404
dc.rights.accessRightsAcesso aberto
dc.sourceWeb of Science
dc.subjectMedicago sativaen
dc.subjectCritical levelen
dc.subjectPotassium fertilizationen
dc.subjectPlant nutritionen
dc.titleNUTRITIONAL STATUS AND DRY MASS PRODUCTION OF ALFALFA IN FUNCTION OF POTASSIUM RATES IN TWO SOILSen
dc.typeArtigo
dcterms.rightsHolderUniv Federal Uberlandia
unesp.author.lattes6726578534593471
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Ciências Agrárias e Veterinárias, Jaboticabalpt

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