Determination of the usage possibilities of some organic fertilisers in the production of corn for silage

This study was carried out in the research field of Van Yüzüncü Yıl University, Faculty of Agriculture, Department of Field Crops in 2022 and 2023. The main objective was to determine the grain yield and various quality values of different fertiliser applications in silage maize plant. In the study, Simpatico maize variety was used and different combinations of DAP, Urea, Organomineral base (OMT), Organomineral top (OMU), Seaweed (DY), Vermicompost (VK) and Humic acid (HA) fertilizers were used as fertilizer sources. The experiment was carried out according to Randomized Block Design with three replications. In the study, 21 parameters were examined and the effect of fertilizer applications was found to be statistically insignificant only on the number of cobs. Other parameters were found to be statistically significant at 1%level. It was recorded that the binary combinations without foliar fertilizers (DAP-URE, DAP-OMU and OMT-OMU) showed the lowest values in all parameters except ADF, NDF and Plant/Sap ratio. The highest values were obtained from the treatments in which the top fertilizer was OMÜ and the foliar fertilizer was vermicompost and humic acid, although the base fertilizer varied. According to the results; plant height 208.00-229.36 cm, cob number 1-1.06 pieces/plant, cob weight 130.50-196.17 g, cob ratio 23.33-34.00%, leaf number 10.15-12.11 pieces/plant, leaf weight 103.33-128.83 g/plant, leaf ratio 18.50-22.45%, stem diameter 18.43-21.10 mm, stem ratio 43.71-58.13%, plant weight 558.50-574.67 g/plant, green grass yield 6610. 83-6823.00 kg/ha, hay yield 1514.00-2035.33 kg/ha, dry matter yield 1513.83-2040.50 kg/ha, dry matter rate 24.76-29.73%, crude protein rate 5.99-7.25%, crude protein yield 90.67-147. 67 kg/da, ADF 19.02-26.59%, NDF 38.08-44.03%, digestible dry matter 68.18-74.07%, dry matter consumption 2.73-3.15%, relative feed value 144.10-180.97. SPAD reading value varied between V4-V6: 28.98-32.88, V11-V13: 40.21-48.16, V14-V16: 40.71-49.86 and VT: 38.26-46.65. In addition, according to the results of the economic analysis, the net profit rates were higher in the treatments with DAP and Urea fertilizers because they were lower in terms of cost. However, in terms of yield and quality parameters examined, it was observed that the treatments with OMT and OMU fertilizers and foliar fertilizers gave better results. In this context, adding organomineral and foliar fertilizers to plant nutrition systems by considering sustainability in plant cultivation is an important step to increase agricultural productivity and soil health.