Efeito da irrigação e substrato no crescimento e produção da espécie Dianthus chinensis L.

Abstract

The ornamental sector, although it has low visibility in relation to the world agricultural market, being little explored/targeted by a great part of the producers is constantly growing and taking on the market. The present study had as objective to evaluate the influence of different irrigation slides and the use of different substrates in the production of Dianthus chinensis L., cultivated in a protected environment. The study was implemented in greenhouse, located at the Federal University of Pampa - Campus Alegrete / RS. The experiment was bifatorial (4 substrates x 4 irrigation blades), in the completely randomized design, with four replications. The substrates used in the treatments were: S1 -30% commercial substrate + 70% soil; S2 - 30% pine + 70% soil; S3 - 100% commercial substrate; and S4 - 70% soil + 15% pine + 15% commercial substrate. The irrigation slides applied to each treatment corresponded to 90,70, 50 and 30% of CV. The sowing was carried out in styrofoam trays, filled with commercial substrate, where they remained until reaching the appropriate stage for transplantation, being relocated to plastic vessels.. Plant height, stem diameter, number of nodes, number of leaves were evaluated weekly.. During the crop cycle two cuts were made. In the accomplishment of the same the productivity was evaluated through the number of branches, number and diameter of flowers. Through the results it is observed that the best plant responses occurred on substrates whose mixture contained commercial substrate. The culture coefficients obtained varied from From 0,17 to 0,37 for the flowering phase and 0.28 to 0.52 for the stage of full bloom. For the region under study, it is concluded that Dianthus chinensis L. presents sensitivity when submitted to conditions of excess and water deficit.