Efficiency and response of conilon coffee clones to phosphorus fertilization

Studies on nutritional efficiency of phosphorus in conilon coffee plants are important tools to unravel the high limitation that natural low levels of this nutrient in soil impose to these species cultivars. Therefore, this study aimed at evaluating the nutritional efficiency and the response to phosphorus of conilon coffee clones. Plants were managed during 150 days in pots containing 10 dm 3 of soil, in greenhouse. A factorial scheme 13 x 2 was used, with three replications, being the factors: 13 clones constituting the clonal cultivar “V itoria Incaper 8142” and two levels of phosphate fertilization (0% and 150% of the P 2 O 5 usualy recommended), in a completely randomized design (CRD). The results indicate a differentiated response of dry matter production and of phosphorus content on each level of phosphate fertilization for the conilon cof fee clones and that CV-04, CV-05 and CV-08 clones are nutritionally ef ficient and responsive to the phosphate fertilization.