Use of a Biostimulant Obtained from Slaughterhouse Sludge in a Greenhouse Tomato Crop

Currently, the use of biostimulants is widespread in sustainable agriculture because they represent an alternative to chemical fertilizers. In this manuscript, we investigate response a greenhouse tomato crop grown pots biostimulant obtained from slaughterhouse sludge applied continuously substrate under which was or directly via foliar route. Two doses (0.7 and 1.4 g L−1), four times throughout growth period (120 days), were used. During period, height plants, number flowers fruits measured. After 90 days nutrient contents leaves as well chlorophyll b analyzed. For fruits, lycopene determined, equatorial diameter average fresh dry weight The results indicate higher content nutrients plants treated with highest dose substrate. This photosynthesis pigments plant possibly responsible for greater absorption N by and, consequently, better growth.