KİMYASAL GÜBRE TÜKETİMİNİN DEĞERLENDİRİLMESİ: BURSA İLİ ÖRNEĞİ

Abstract

In this study, fertilizer types used in Bursa province between 2008 and 2016 were classified according to their chemical structure and their annual usage according to districts were calculated per unit of land. Amount of the fertilizer types used in districts were mapped with Geographical Information System and the statistical relationships between the types of agricultural product and fertilizer were calculated by correlation and regression analysis. Due to the increase in population and exports of Bursa, the fertilizer usage with agricultural production increased. Nitrogen fertilizers were determined to have the highest usage among other fertilizer groups. The usages of fertilizers of nitrogen (maximum 82.47 kg/ha-Karacabey), nitrogen phosphorus potassium (maximum 31.59 - kg/ha-Karacabey), and calcium nitrate (maximum 8.1 kg / ha-Yenisehir), nitrogen and phosphorus (maximum 58.45 kg/ha-Yenisehir) were more found in Karacabey, Yenisehir, Mustafakemalpasa ve Inegol. TSP (maximum 12.5 kg / ha-Gursu) and zinc (maximum 26.84 kg / ha-Gemlik) fertilizers were used more in Gursu, Orhangazi, Mudanya, Gemlik and Iznik than the other districts. The higher correlation (r2) values than the others were found between nitrogen, phosphorus and potassium fertilizers and field crops and vegetable production (0.423-0.788). Nitrogenous, nitrogenous and phosphorous and nitrogen, phosphorus and potassium fertilizers were found to be positively related to crop production and effective in production. This study is important in order to determine the distribution of agricultural fertilizer usage, which is the diffuse pollution source, by districts and to provide information to fertilizer management studies that could be done to reduce pollution.