@article{Mehmet Arif ÖZYAZICI_Semih AÇIKBAŞ_Mehmet TURHAN_2020, title={Changes of Some Agricultural Properties According to Nitrogen Fertilization in Forage Rape (Brassica napus L. ssp. oleifera Metzg)}, volume={4}, url={https://www.ispecjournal.com/index.php/ispecjas/article/view/65}, DOI={10.46291/ISPECJASvol4iss2pp387-404}, abstractNote={<p>This research was conducted to determine the effect of different nitrogen fertilizer doses on yield and nutritional value of forage rape (Brassica napus L. ssp. oleifera Metzg) under Siirt ecological conditions in the Southeast Anatolian Region of Turkey in 2019-2020 vegetation season. Lenox variety of forage rape was used as plant material in the study. In the study, field trials were established according to randomized complete blocks designed with three replications and 5 different doses of nitrogen (N) (N<sub>0</sub>= 0 kg N/da, N<sub>5</sub>= 5 kg N/da, N<sub>10</sub>= 10 kg N/da, N<sub>15</sub>= 15 kg N/da and N<sub>20</sub>= 20 kg N/da) constituted the subject of the research. Urea (46% N) was used as the source of nitrogen fertilizer. In the research, plant height, the number of branches per plant, stem thickness, green herbage yield, hay yield, crude protein (CP) ratio, CP yield, acid detergent fiber (ADF) ratio, neutral detergent fiber (NDF) ratio, and phosphorus (P), potassium (K), calcium (Ca) and magnesium (Mg) ratios in the plant were investigated. According to the results of the research, the plant height, number of branches per plant, green herbage yield, hay yield, CP ratio, CP yield, P and Ca ratios were increased while ADF and NDF ratios were decreased as a result of the increased doses of nitrogenous fertilization applied to the soil. According to nitrogen fertilizer doses in the study, plant height of the forage rape was 144.3 to152.5 cm, the number of branches per plant was 5.9 to 9.1, stem thickness was 8.45 to 9.06 mm, green herbage yield was 2536.1 to 3409.7 kg/da, hay yield was 459.1 to 643.4 kg/da, CP ratio was 8.68 to 11.21%, CP yield was 39.79 to 65.41 kg/da, ADF ratio was 47.49 to 52.33%, NDF ratio was 54.59 to 64.00%, P ratio was 0.23 to 0.27%, K ratio was 2.19 to 2.49%, Ca ratio was 1.39 to 1.55% and Mg ratio varied between 0.16 and 0.18%.</p>}, number={2}, journal={ISPEC Journal of Agricultural Sciences}, author={Mehmet Arif ÖZYAZICI and Semih AÇIKBAŞ and Mehmet TURHAN}, year={2020}, month={Jun.}, pages={387–404} }