01546naa a2200289 a 450000100080000000500110000800800410001910000200006024501070008026000090018752007660019665000200096265000140098265000230099665000200101965300180103965300180105765300170107565300190109265300220111165300150113370000180114870000180116670000190118470000150120377300380121820347832016-03-04       2015    bl uuuu     u00u1 u    #d1 aSOUZA, H. A. de  aNitrogen nutrition of guava trees in response to byproduct of fruit processing.h[electronic resource]  c2015  aStudies of the effect of organic fertilization of perennial crops are scarce due to the time necessary for the plants to present the first results. The objective of this study was to assess the leaf nitrogen (N) content, the direct and indirect measures of chlorophyll content, fruit yield and their correlations in an orchard of adult guava trees of the Paluma cultivar, through five consecutive harvests, in function of application of a byproduct of guava processing. The following doses of the byproduct were applied: 0, 9, 18, 27 and 36 t ha-1. The material was applied on the surface, without incorporation, once a year between 2006 and 2010. The byproduct doses influenced the nitrogen concentrations, SPAD index, chlorophyll b level and fruit production.  aAnálise foliar  aClorofila  aNutrição vegetal  aPsidium Guajava  aChlorophyll a  aChlorophyll b  aChlorophylls  aLeaf diagnosis  aNutrição foliar  aSPAD index1 aROZANE, D. E.1 aAMORIM, A. D.1 aMODESTO, V. C.1 aNATALE, W.  tJournal of Plant Nutrition, 2015.