Exportação de nutrientes e qualidade de cultivares de rosas em campo e em ambiente protegido

Abstract

The nutrient exportation from rose cultivars and characteristics that reflect quality in the field and in a protected environment were evaluated in this research. A completely randomized design was adopted, and in the protected environment the treatment was constituted of 15 cvs. and in the field of 12, with three repetitions. Each experimental unit consisted of two plants, being collected one branch per plant. Branches and flower bud diameter, branch length, dry matter and the macro and micronutrients contents in the branches were determined. Plants with greater length and diameter of branches also showed larger quantity of extracted nutrients. The nutrients taken in larger quantities were N and K. Based on the amount of extracted nutrients, it is possible to establish groups of cvs. with similar nutritional requirement for the recommendation of fertilizers.