: The objective of the researches has included study on the impact of the liquid organic fertilizer on the quality of the maize. For this purpose the experiment was organized in field conditions, in which were included 3 lots, seeded with maize. As fertilizer was used aqueous solution (liquid fertilizer) produced from worm’s compost. Through biochemical analysis was evaluated the quality of maize in various stages of vegetation. Maceration of maize seed in liquid fertilizer and its administration as supplementary food (three round), has improved the quality of maize increasing total nitrogen content respectively with 65,41% and 21,71%, in the plants on the experimental lot I and with 31,45% and 17,12% - in the plants collected from experimental lot II, also nitrate content decreased with 4,33% -49,95% in maize samples (experimental lot I) and with 1,93 % -16,70% (experimental lot II), in comparison with the plants in the control lot. So, the quality of maize cultivated using seed macerated in extract produced from raw worms compost and its administration as supplementary food, is higher than in the control lot.