Effect of adding different types of organic wastes on some soil traits, growth and yield of eggplant (Solanum melongena L.)


ABSTRACT The experiment was conducted for the autumn season (2018 - 2017) in one of the greenhouses belonging to the Department of Horticulture, College of Agriculture, Al-Qasim Green University, in the soil with a sandy texture. The randomized complete block design (RCBD) was used, with three replicates. The experiment included 3 replicates and for each replicate is a 9 treatments to became the total number of experimental units are 27 treatment: The drainage wastes which is symbolized by (M), poultry wastes which is symbolized by (D), cow manure which is symbolized by (A), and peat moss which is symbolized by (P) randomly distributed on the experimental units, with a rate of (20, 40 tons.ha-1) for each treatment, with three replicates in addition to the control treatment (without any adding). The results showed that the organic wastes from plant origin (peat moss) were characterized by raising their content of organic matter, organic carbon and humin than the rest of the wastes, where their concentrations amounted to (479.4, 206.54, 312.0 g.kg-1), respectively. while the highest concentration of humic acid amounted to (17.52 g.kg-1) and the lowest C: N ratio amounted to (8.96) in poultry wastes compared to other wastes. The eggplant yield increased with adding organic wastes compared to the control treatment. Poultry wastes gave the highest yield of eggplant amounted to (100.00, 178 ton.ha-1) for 20 and 40 ton.ha-1, respectively.