The horticulture is very used in the familiar agriculture in the Brazil, Para state, in which the main part of production is used for family consumption. The lettuce more cultivated is Vanda (Lactuca sativa L.) and the family use own labor. The main objective this paper was evaluable the development of lettuce cv Vanda cultivated in beds with organic compounds and chemistry fertilization (NPK). The radicular system, plant height and production of mass fresh were evaluated. The best results in relation of roots development were in the lettuce cultivated with organic compound in the proportion of 5 kg/m2 due it characteristics as a soil conditioner. The better results in relation fresh mass production and height of plant were obtained with use of chemistry fertilization (NPK), in which this result was obtained mainly by addiction of 10 g/m2 of the extra nitrogen as cover fertilizer. Statistical analyzes showed that difference between height of plant cultivated with chemistry fertilizer and organic compound were similar. In relation of roots development the difference was statistically significant.

Horticulture is a widespread activity in family farming in the Transamazonian region—Pará, with emphasis on production aimed at the family’s own consumption. The lettuce cultivar Vanda (Lactuca sativa L.) represents a significant part of this production, which prioritizes the use of internal labor. The main objective of this work was to evaluate the development of lettuce CV Vanda grown in beds using organic compost and chemical fertilization (NPK). The criteria considered to evaluate this performance were: Root system development, plant height and total fresh mass production. The best averages in relation to root development occurred in the plots cultivated with organic compost in the proportion of 5 kg/m2, due to its characteristics as a fertilizer and soil conditioner. The cultivation with the use of NPK provided the best averages in relation to the production of total fresh mass and plant height, results that were mainly attributed to the extra supply of nitrogen in the covering fertilization, which consisted in the addition of 10 g urea per square meter via soil. Statistical analysis showed no statistically significant difference regarding plant height for both treatments. And in relation to root development, the difference was statistically significant.