Influência da variedade e do porta-enxêrto, na composição mineral das fôlhas de citros

摘要: The influence of five different combinations scion-rootstock for two scion varieties on the percentage nitrogen, phosphorus, potassium, calcium, and magnesium in citrus leaves is reported. Leaves from fruiting shoots spring flushes were taken Baianinha Pera oranges trees (Citrus sinensis Osbeck) experimental orchards located Experiment Station Limeira, State Sao Paulo. rootstocks On which they are budded used this study were: orange, sweet orange (C. Osb.), Rangour lime reticulata Blanco X C- aurantifolia Swing (?)), rough lemon limon Burm. f. Cleopatra mandarin Blanco). In 1957 when leaf sampling was started Rangpur 21 years old those an 7 old, but only plants same age compared. Fertilization uniform all plots soil apparently very uniform. Confidence limits mean results inorganic composition 3 to 6 months presented. Seasonal changes nutrient ore olso shown. both differed their principal mineral constituents. major difference found potassium content. contained relatively more than leaves. changed according rootstock species. Differences levels some variety be significant rootstocks. Variations older could associated with virus disease tolerance longevity view obtained, other factors such as diseases, longevity, etc. besides varietal effects selectivity absorb nutrients, must into account attempting associate foliar analysis fertilizer utilization by trees.