Symptoms and growth components in feijoa (Acca sellowiana [O. Berg] Burret) plants in response to calcium, magnesium and boron deficiencies

Nutrient deficiency symptoms are widely used to determine the nutrient demands of a crop and clarify nutritional disorders, especially when they specific. Until now, calcium (Ca), magnesium (Mg) boron (B) experiment has not been carried out on feijoa, diagnostic have described. For this reason, 9-months-old ‘Quimba’ feijoa plants were studied using missing method. A modified Hoagland Arnon solution was applied for each treatment, leaving one element in treatment. The treatments were: (1) complete fertilization (control); (2) -Ca; (3) -Mg; (4) -B; (5) without (negative control). Deficiency described, photographic records made. Ca noted early shoot tips later fully-expanded, young leaves. Mg-deficiency observed older fully-expanded leaves, mainly as interveinal chlorosis, while B generated variety symptoms, total chlorosis fully leaves mosaic adult growth components, Mg reduced number apical shoots, Ca- Mg-deficiencies seedling rate significantly. future experiments, authors suggest an period longer than 102 d achieve more conclusive results.