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Currently one of the most important problems in the world is the erosion and the low productivity of the agriculture soils, so a common practice to increase yield is to use mineral fertilizers; however excessive use cause environmental problems. The application of composts based on organic wastes is a sustainable way to reduce soil pollution and increase their fertility. The aim of this work was to evaluate the compost effect made from different combinations of vegetable waste and cow manure on the yield and antioxidant content of a lettuce crop, and its comparison with two controls: chemical fertilizers (Chem) and without fertilization (C-). Four types of composts were prepared using vegetable waste (V), stubble (S), cow manure (M) and the mixture of vegetable and cow manure (MV), the fertilization rate was 5 and 10%. The variables evaluated were plant height, number of leaves, foliage volume, and antioxidants content. Composts V and S registered greater height (p>0.05) than the rest of the treatments and controls. There were no differences (p>0.05) in antioxidant content between Mexican Journal of Biotechnology 2020, 5(2):86-105 Journal homepage:www.mexjbiotechnol.com ISSN:2448-6590 ORIGINAL RESEARCH

Effect of composts produced from vegetable waste and/or manure on lettuce crop and their antioxidants content