Nitrogen loading of Eucalyptus globulus seedlings: nutritional dynamics and influence on morphology and root growth potential

Simple item page
dc.contributor.authorAcevedo Tapia, Manuel
dc.contributor.authorRubilar, Rafael
dc.contributor.authorDumroese, R. Kasten
dc.contributor.authorOvalle, Juan F.
dc.contributor.authorSandoval, Simón
dc.contributor.authorChassin-Trubert Fuentealba, Rodrigo Andrés
dc.date.accessioned2020-05-25T15:37:47Z
dc.date.available2020-05-25T15:37:47Z
dc.date.issued2020
dc.description.abstractAchieving successful outplanting of trees on increasingly harsher sites is a global concern. In Chile, for example, new Eucalyptus globulus plantations are being targeted to poorer, low fertility sites where additional stresses often negatively affect seedling performance during the first field season. Nitrogen-loading during the later stages of nursery production can, however, significantly improve seedling physiological performance on harsher sites by increasing plant growth and nutrient storage reserves for subsequent root growth after outplanting. Maximizing these benefits, and applying the concept of loading throughout the entire crop cycle, requires a better understanding of nitrogen (N) dynamics. Thus, for container E. globulus, considered one of the most important plantation species worldwide, we evaluated the effects of increasing N supply (50 to 600 mg N L−1) on seedling morphological traits, biomass production, root growth potential, and foliar N. After 15 weeks of N application, seedlings showed an increase in all growth variables evaluated up to 300 mg N L−1, whereas higher rates allowed luxury consumption. Modeling growth responses revealed, however, an apparent ammonium antagonism with other macronutrient cations suggests that high rates of this N-form may negate the potential benefits of N-loading, or that other modifications to the fertilizer solution may promote additional growth at higher N rates. Foliar N concentration, which was easily and accurately measured with a leaf chlorophyll meter, showed a gradient from basal to apical leaves suggesting a strong translocation of N in E. globulus seedlings. Our results suggest nursery management that supplies 300 mg L−1 of N through the entire growing season could improve seedling nutritional status, morphological attributes, and growth of new roots, attributes that may improve establishment on low fertility sites.
dc.identifier.citationAcevedo, M., Rubilar, R., Dumroese, R.K. et al. Nitrogen loading of Eucalyptus globulus seedlings: nutritional dynamics and influence on morphology and root growth potential. New Forests (2020). https://doi.org/10.1007/s11056-020-09778-2es_CL
dc.identifier.issn1573-5095
dc.identifier.otherhttps://doi.org/10.1007/s11056-020-09778-2es_CL
dc.identifier.urihttps://bibliotecadigital.infor.cl/handle/20.500.12220/29222
dc.language.isoenes_CL
dc.publisherSpringeres_CL
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 Chile*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/cl/*
dc.subjectPLANTULASes_CL
dc.subjectRENDIMIENTOes_CL
dc.subjectNITROGENOes_CL
dc.subjectINCREMENTO DE DIAMETROes_CL
dc.subjectESTADO NUTRICIONALes_CL
dc.subjectCLOROFILASes_CL
dc.titleNitrogen loading of Eucalyptus globulus seedlings: nutritional dynamics and influence on morphology and root growth potentiales_CL
dc.typeArtículo de revista
infor.especieEucalyptus globuluses_CL
infor.lineasdeinvestigacionRestauración y Manejo Ecosistémico de Recursos Forestales Nativos
infor.operadorplves_CL
infor.publicadoenNew Forests 2020es_CL
infor.sedeSede Bio-Bioes_CL
Files
Collections
Silvicultura y Manejo de Ecosistemas Forestales Nativos y Exóticos