Nutritional efficiency in phosphorus of arabica coffee genotypes

Nutritional efficiency is a term used to characterize plants in their capacity to uptake and use nutrients, being related to the efficiency of uptake, translocation and utilization of nutrients. Different coffee genotypes are expected to exhibit variability in their nutritional efficiency. This work aimed to evaluate the phosphorus nutritional efficiency in arabica coffee genotypes. The experiment was conducted in a greenhouse of the Empresa de Pesquisa Agropecuaria de Minas Gerais (EPAMIG), located in the municipality of Lavras ? Minas Gerais, Brazil. The experimental design was a randomized complete block design, in a 10x2 factorial scheme (10 arabica coffee genotypes and two dosages of phosphate fertilization), with four replications. Each experimental plot consisted of one pot with ten liters of soil, with one plant. The cultivars Catigua MG2, MGS Ametista and Sarchimor MG 8840 are neither efficient nor responsive to phosphate fertilization. Progeny H 6-47-10 pl. 3 and the cultivar Catuai Vermelho IAC 144 are not efficient but are responsive to phosphate fertilization. The cultivars Paraiso MG H 419-1, Topazio MG 1190 and MGS Paraiso 2 are efficient but are not responsive to phosphate fertilization. The cultivars Bourbon Amarelo IAC J10 and MGS Aranas are efficient and responsive to phosphate fertilization.