Craveiro (Dianthus caryophyllus) sob doses de potássio em solos com diferentes atributos físico-químicos

Abstract

Carnation has high durability and adapts well in regions with a subtropical climate. Thus, knowledge of the nutritional requirements of the species in relation to soils is necessary for the introduction of cultivation in the West Frontier of Rio Grande do Sul (RS). In this context, the objective was to evaluate the growth and development of carnation in terms of potassium fertilization in pots with soils of different physical and chemical attributes. The experiment was carried out in the experimental area of the Federal University of Pampa (UNIPAMPA), Campus Itaqui/RS. The experimental design used was completely randomized in a 2x5 factorial scheme (factor A x factor B) with four replications. Two soils with different physicochemical attributes collected in two locations (factor A) were used as substrates. Factor B was composed of different doses of potassium, totaling 40 vessels with a capacity of 10L.Visual diagnosis of the appearance of plants was carried out, analysis of plant height, dry matter over time and total dry matter were performed. The results showed that there was no significant difference between potassium doses and soil types for carnation production. The doses of Maximum Technical Efficiency and Maximum Economic Efficiency according to the Dry Matter of Leaves over time are 372.77 mg dm-³ and 335.49 mg dm-³ of K, respectively, while with the Total Dry Matter the doses are 357 mg dm-³ and 321.3 mg dm-³ of K, respectively.