Effects of Phosphorus and Nitrogen Applications on Sesame (Sesamum indicum L.) Yield in Semi-Arid Climatic Conditions

Abstract

The aim of this study is to determine the nitrogen and phosphate need of indigenous sesame (Sesamum indicum L.) variety as the second crop in Harran Plain conditions. This study was carried out in research field of GAP Training Extension and Research Center. This study which is designed according to “split plot” with three replications is researched effects of 5 different nitrogen and 4 different phosphate doses on sesame yield. As the result of this study, two years mean sesame seed yield changed between 116.0 kg/da – 166.5 kg/da. The first year, the lowest sesame yield of 100.7 kg/da with the application of 12 kg P2O5/da - 16 kg N/da was obtained and the highest yield of 176.7 kg/da with the application of 8 kg P2O5/da - 0 kg N/da was obtained. The second year, the lowest sesame yield of 98,39 kg/da with the application of 4 kg P2O5/da - 12 kg N/da was obtained and the highest yield of 162,4 kg/da with the application 8 kg P2O5 /da - 4 kg N/da was obtained. The negative interaction on yield between the phosphorus and nitrogen application was found. Negative effects on yield were observed when the amount of both the phosphate and nitrogen simultaneously increased or decreased. However, the yield has increased when the amount of one nutrition was increased and the other was stabled.

Keywords: Fertilizer, Harran Plain, Secondary Crop, Sesame, Yield