Determination of Nutrient Element Contents in Sour Orange Seedling Leaves after the Application with Fish Farm Sludge

The aim of the study is to determine the effect of trout pool sedimentation wastes treatments on leaf nutrient contents in sour orange seedlings and subtitution chance in comparison to mineral fertilizers in plant nutrition. The waste sludge collected from the farming pond was firstly air dried and 0, 5, 10 and 20 g kg-1 doses of waste material applied to sour orange seedling pots. At the same time, for each different solid waste doses, three different hoagland nutrient solutions were applied as 0, 50% and 100% doses. N, P, K, Ca, Mg, Na, Fe, Zn, Mn and Cu contents were determined as leaf nutrients in the study. According to the results, waste applications increased significantly N, Zn and Cu contents of leaf in comparison to the control. In different dose applications of Hoagland solution resulted as increase in N, K and Zn contents but decreased Fe and Na contents in comparison to the control. Application of waste and Hoagland combination doses determinations resulted as N: 1.40-4.64%, P: 0.22-0.34%, K: 0.47- 2.61%, Ca: 2.35-3.07%, Mg: 0.28-0.34%, Na: 158-664 mg kg-1, Fe: 73.3 - 126.7 mg kg-1, Zn: 23.3 - 46.3 mg kg-1, Mn: 9.3 - 30.7 mg kg-1 and Cu: 2.0 - 19.7 mg kg-1. As a result, fish sludge effect nutrients positively in sour orange seedling plants. Generally, the waste and Hoagland solution gave similar results. For this reason, it is evaluated that it can be used as a fertilizer source either alone, especially in organic farming, or in combination with mineral fertilizers in conventional farming