Yield and nitrogen use efficiency of sweet potato in response to cover crop and nitrogen management

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dc.contributor.authorFernandes, Adalton M. [UNESP]
dc.contributor.authorCampos, Lucas G. [UNESP]
dc.contributor.authorSenna, Marçal S. [UNESP]
dc.contributor.authorda Silva, Carolina L. [UNESP]
dc.contributor.authorAssunção, Natália S. [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2018-12-11T17:22:28Z
dc.date.available2018-12-11T17:22:28Z
dc.date.issued2018-09-01
dc.description.abstractSelected cover crops can provide N to sweet potato (Ipomoea batatas [L.] Lam) crops cultivated in succession and reduce the need for mineral N application. This study was conducted to determine the growth, leaf N concentration, N uptake, N removal, storage root yield, and N-use efficiency of sweet potato crop in response to different cover crop sources and mineral N fertilizer rates. A field experiment was performed over 2 agricultural yr using a randomized complete block design with split-plots and four replications. Whole plots consisted of four cover crops: One control (spontaneous weeds), two legumes (Crotalaria spectabilis and Mucuna aterrima), and one cereal (Pennisetum glaucum). Subplots consisted of four N rates (0, 50, 100, and 200 kg ha–1) applied to the sweet potato. When no N was applied, M. aterrima supplied more N to sweet potato grown in succession but had the same effect as C. spectabilis on root yield. P. glaucum and spontaneous weeds had the same effect on the N supply and performance of sweet potato. The N rates for the optimum root yield of sweet potato were 49.6 and 76.6 kg N ha–1 when grown after legume and non-legume species. In tropical conditions, the use of legumes as cover crops reduced the need for mineral N fertilizers by up to 35.2% for sweet potato. The cultivation history of a field should be an important consideration when determining the N fertilization for sweet potato because a high N supply favored the growth of vegetative plant parts.en
dc.description.affiliationSão Paulo State Univ. (UNESP) Center of Tropical Roots and Starches (CERAT), Lageado Experimental Farm, P.O. Box 237
dc.description.affiliationSão Paulo State Univ. (UNESP) College of Agricultural Sciences
dc.description.affiliationUnespSão Paulo State Univ. (UNESP) Center of Tropical Roots and Starches (CERAT), Lageado Experimental Farm, P.O. Box 237
dc.description.affiliationUnespSão Paulo State Univ. (UNESP) College of Agricultural Sciences
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipIdCNPq: 147876/2015-0
dc.description.sponsorshipIdFAPESP: 2014/22362-4
dc.description.sponsorshipIdFAPESP: 2017/11166-8
dc.description.sponsorshipIdCNPq: 301827/2017-6
dc.format.extent2004-2015
dc.identifierhttp://dx.doi.org/10.2134/agronj2017.12.0721
dc.identifier.citationAgronomy Journal, v. 110, n. 5, p. 2004-2015, 2018.
dc.identifier.doi10.2134/agronj2017.12.0721
dc.identifier.issn1435-0645
dc.identifier.issn0002-1962
dc.identifier.lattes6642173668831407
dc.identifier.orcid0000-0002-6745-0175
dc.identifier.scopus2-s2.0-85052700673
dc.identifier.urihttp://hdl.handle.net/11449/176780
dc.language.isoeng
dc.relation.ispartofAgronomy Journal
dc.relation.ispartofsjr0,938
dc.relation.ispartofsjr0,938
dc.rights.accessRightsAcesso restrito
dc.sourceScopus
dc.titleYield and nitrogen use efficiency of sweet potato in response to cover crop and nitrogen managementen
dc.typeArtigo
unesp.author.lattes6642173668831407[1]
unesp.author.orcid0000-0002-6745-0175[1]

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Botucatu - CERAT - Centro de Raízes e Amidos Tropicais