This invention is related to device, its production process and also to the usage of the trbe shaped device (1) filled with a liquid means (6) for the plats nutrition/protection, which is inserted into the substrate (8) as much as closer to the main plant, where discharge occurs. Novelty is reflected in the way of forming and removing the shutters now obtained by heating wax, resin, plastic, rubber, hot-melt glues and compounds of similar characteristics, upon whit they become a liquid mass in which the openings of the tube are to be immersed; in this way, the film, after being hardened, forms the membrane (3a, 3b) which, due to the pressure to the sides of the tube (1), out-breaks; unlike of classic shutters which makes production and usage more complicated and makes some waste after being used. If the means which will form an clastic membrance are in charge, its removing is to be done rather by divestment tan by breaking or penetration (by direct pressure)