Brokoli Üretiminde Tavuk Gübresinin İnorganik Azotla Rekabet Edebilirliğinin Değerlendirilmesi

Abstract

Objective: This research was undertaken to evaluate the assessment of chicken manure's competitiveness with inorganic nitrogen in broccoli production. Material and Method: This study was conducted out in field conditions at the experimental area of Atatürk University, Faculty of Agriculture, Department of Horticulture, Erzurum, Türkiye, in 2021 and 2022. Two broccoli cultivars (Brassica oleracea var. italica, Plenk cvs. 'Burney F1' and 'Lucky F1') were used as plant material. While phosphate (200 kg P2O5 ha-1) was kept constant in the plots, 1000 kg ha-1 (CM-1), 2000 kg ha-1 (CM-2), and 4000 kg ha-1 (CM-3) chicken manure were applied additionally. The other application was planned according to the recommended dose of nitrogen (Ammonium nitrate (AN), 200 kg N ha-1). Head weight (g), diameter, and length (cm); dry matter contents of head (%); chlorophyll (SPAD); pH and soluble solid content (SSC) (%) content of heads and yield (kg ha-1) were recorded in harvested heads. Results: The head weight ranged from 81.2 g (control) to 295.4 g (AN). The head diameter and length changed from 6.4 cm and 4.9 cm (control) to 13.9 cm and 13.6 cm (AN), respectively. The highest chlorophyll (SPAD) content (87.6) was consistently observed in the AN application. CM applications were consistently lower than those from AN application for all cultivars and across both years. Furthermore, in CM applications, the highest yield was attained in 2021 at 16820 kg ha-1 (CM-3, 4000 kg ha-1), whereas the peak yield of 20618 kg ha-1 was recorded in the AN treatment in 2022. Conclusion: While the yield derived from chicken manure application falls below that achieved through AN application, it is worth noting that, in the context of environmentally sustainable production practices, the utilization of chicken manure at a rate of 4000 kg ha-1 can be advocated. As a result, chicken manure at a rate of 4000 kg ha-1 can be recommended to broccoli producers for environmentally friendly production.