This study was carried out to determine the effects of urban sewage sludge and boron applications on  some chemical and physiological properties of cowpea (Vigna unguiculata L.). The experiment was carried out in a factorial pattern with three replications according to a randomized plot design. In the study, Karagöz cowpea variety, four boron doses (B0; 0, B1; 50, B2; 100, B3; 200 mg Boron kg-1), and four sewage sludge doses (SS0; 0, SS1; 2.5%, SS2; 5%, SS3; 10%) were used. In the experiment, seedling and root length (cm), seedling and root fresh weight (g), seedling and root dry weight (g), number of leaves (number), leaf area (cm2), and macronutrient elements in the plant were examined. As a result, the effects of sewage sludge and boron applications on seedling and root length, seedling and root fresh weight, leaf number, leaf area, and seedling and root dry weight were found to be significant. In the study, it was determined that the effect of the mutual interaction of the factors on the seedling and root length, seedling and root fresh weight, and root dry weight was significant. In addition, the effects of boron and sewage sludge applications on plant nutrients (P, Ca, K, Mg) were found to be significant. The effect of the interaction of the factors on the elements was found to be significant and the highest phosphorus, calcium, potassium, and magnesium values (1.662 mg kg-1, 3.159-3.158%, 3.524% and 1.309%) were obtained from B0xSS3, B0xSS0-B2xSS0, B0xSS0, B3xSS0 applications, respectively, while the lowest values (0.414-0.413 mg kg-1, 0.454%, 1.361%, and 0.312%) were obtained from B1xSS0-B2xSS1, B1xSS3, B1xSS3, B2xSS2 applications, respectively.

27.4.2022