This work had the objective to evaluate the effect of organic compost levels in chemical properties of soil, nutrient contents of seeds and quality of lettuce seeds. The experimental design was randomized blocks, with five treatments (T0: without organic compost; T30: 30 t ha-1; T60: 60 t ha-1; T90: 90 t ha-1 and T120: 120 t ha-1 of organic compost) and five replications. There were not differences in seed nutrient contents and physiological quality (germination and vigor). However, linear increases were observed in organic matter levels, calcium, magnesium, basis sum, CEC and base saturation of soil at final culture cycle.
Lactuca sativa L; organic fertilization; soil fertility; nutrient content
