constructive arrangement introduced in a tray for the production of plant seedlings in general. it is a tray (10) for producing seedlings (md) of plants in general, specifically arranged in tubes (tb) or other container of similar dimensions； Said tray (10) is comprised of a single flat base piece (11) formed by multiple spans (11a) resulting from orthogonal crossings (12) in ordinary "t" shape； said spans (11a) configure cradles (b) for the insertion and support of the tubes (tb) and their seedlings (md)； Said tray (10) is made of recycled polypropylene or other suitable material and present in the making of the flat base (11) at least one rigid structure (er) formed by profiles (13) made of carbon steel, configuring structural beams (vr) ； the profiles (13) on the flat base (11) are inserted in some sleepers (12a) which have height (t1) and width (x1) dimensions greater than the height (t2) and width (x2) dimensions of the further sleepers (12b) that make up the spans (11a) such that each said sleeper (12a) receives the insert in the form of a metal profile (13)； the rigid structure (er) is strategically distributed in the base (11) to form means to prevent bending or twisting while maintaining the integrity of the spans (11).disposição construtiva introduzida em bandeja para produção de mudas de plantas em geral. trata-se de bandeja (10) para produção de mudas (md) de plantas em geral, especificamente, dispostas em tubetes (tb) ou outro recipiente de dimensões similares； dita bandeja (10) é compreendida por peça única com base plana (11) formada por múltiplos vãos (11a), resultantes dos cruzamentos ortogonais de travessas (12) em formato ordinário de ?t?； ditos vãos (11a) configuram berços (be) para a introdução e apoio dos tubetes (tb) e respectivas mudas (md)； dita bandeja (10) é confeccionada em polipropileno reciclado ou outro material adequado e apresentar na confecção da base plana (11), pelo menos uma estrutura rígida (er) forma
