Effect of a chitosan polymers mixture in tomato plants (Solanum lycopersicom L.).

In order to evaluate the effect of a chitosan polymers mixture in tomato plants (Solanum lycopersicum L.), the present work was carried out in which different doses and moments biostimulant application were used. To do this, Amalia variety seeds sown in seed beds and later transplanted in the field at a distance of 0.25 m between plants and 1.20 m between rows were used. Polymers mixture of chitosan applications were made at two moments of the crop cycle, seven-eight days after transplantation and at the beginning off lowering, using the doses of 200, 400 and 600 mg ha-1 in each of the moments mentioned above, there were also three treatments in which the previous doses were applied in equal parts in the two moments studied, and a control without bioestimulant made room for ten treatments. The length and diameter stem, dry mass of the aerial part, leaf surface, average number of fruits and fruit mass, and the yield per plant were evaluated. From the results obtained, it was possible to conclude that the polymers mixture of chitosan application in the start period of the flowering, increased the accumulation of dry matter, the leaf surface, the formation of a bigger fruits number and yield of tomato plants. [ABSTRACT FROM AUTHOR]