Determination of the effects of some organic fertilizers on growth and productivity in lettuce growing

Organic fertilization is one of the most effective methods used to increase fertility parameters in the soil. While organic fertilizers provide improvements in soil characteristics, they also contribute to plants grown on it in terms of productivity and quality. In this study, the effects of increasing doses of poultry manure (PM) )(0 kg da-1, 100 kg da-1, 200 kg da-1, 300 kg da-1), farmyard manure manure (FM) )(0 kg da-1, 100 kg da-1, 200 kg da-1, 300 kg da-1), vermicompost (V) )(0 kg da-1, 100 kg da-1, 200 kg da-1, 300 kg da-1) and leonardite (L) )( 0 kg da-1, 50 kg da-1, 100 kg da-1, 200 kg da-1) as organic fertilizer which were repeated for four times on lettuce growth and productivity in pot conditions were determined during 2 growing periods. The effects of vermicompost, leonardite and farmyard manure on the development of lettuce plants were found to be the most effective manures. In the effects of organic fertilizer doses on lettuce productivity, the applications of FM3 (300 kg da-1) and V3 (300 kg da-1) were the ones in which the highest productivity was obtained. It was determined that organic fertilizers have important effects on lettuce plants in terms of yield, the number of leaf, lenght, body diameter, vitamin C, nitrate, P, Ca and Mg.The highest values of nitrate content of plants were determined from the applications of FM1 (100 kg da-1) and PM1 (100 kg da-1) and it was determined that they do not carry risk in terms of human health. The applications of V1 (100 kg da-1) and FM3 (300 kg da-1) in the macro elements the nutrient content of plants and PM3 (300 kg da-1), FM3 (300 kg da-1) and V3 (300 kg da1) in the micro contents identified as applications in which the highest values are obtained. Especially (TG) and (ÇG) applications are effective in terms of pH, EC, organic materials, N, P, K, CA, Zn and Cu. Dose effects were determined to be important for EC, organik materials, N, P, K, Ca, Fe, Mn and second and third doses became prominent. The second and the third doses of PM and FM are more effective. To determine the effects of different fertilizers on plants and soil, combined applications to state the best material, dose and combinations can provide an advantage.