Growth and nutritional disorders of coffee cultivated in nutrient solutions with suppressed macronutrients |
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| Authors: | Rilner Alves Flores Bernardo Melo Montes Nogueira Borges Hilário Júnior Almeida Renato De Mello Prado |
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| Institution: | 1. Department of Soils, Goias Federal University, Goiania, Goias, Brazilrilner1@hotmail.com;3. Department of Soil and Fertilizers, Sao Paulo State University, Jaboticabal, Sao Paulo, Brazil |
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| Abstract: | The objective was to evaluate the effect of omitting macronutrients in the nutrients solution on growth characteristics and nutritional status of coffee. The treatments were complete nutrients solutions and solutions with nutrient omission: N (nitrogen), P (phosphorus), K (potassium), Ca (calcium), Mg (magnesium) and S (sulfur). The experiment was carried out under greenhouse conditions with 3 replicates in a completely random design. Plant height, number of leaves per plant, stem diameter, relative chlorophyll index, photosynthesis rate, stomatal conductance, transpiration, carbon dioxide (CO2) concentration, dry matter, content levels of macronutrients in plant aerial part and root system, and nutritional disorders were evaluated. Macronutrients suppression affected nutrients concentration in many plant parts, inducing the appearance of symptoms characteristic of each nutrient. The most limiting nutrients for coffee plants development were nitrogen and calcium, reflected in the lower dry matter accumulation and nitrogen the most required. |
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| Keywords: | Coffea arabica L nutritional deficiency mineral nutrition |
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