بررسی خصوصیات فیزیولوژیک کلزای پاییزه تحت تأثیر کاربرد تلفیقی کودهای شیمیایی- زیستی، اسید سالیسیلیک و آبیاری تکمیلی

This research was carried out in order to investigate the integrated application of chemical-biological fertilizers and salicylic acid under the effect of supplementary irrigation on autumn rapeseed in the crop year of 2018-2019, in the research farm of the Faculty of Agriculture of Lorestan University in the form of a split-plot design based on complete randomized blocks. The experimental treatments include the main factor of supplementary irrigation (I1: two supplementary irrigations (the first irrigation after seed planting and the second irrigation during the growing season) and I2: three supplementary irrigations (the first irrigation after seed planting, the second irrigation during the growing season and the last irrigation at the time of reproductive growth), and sub-factors of chemical-biological fertilizer combination (F1: NPK consumption of basic fertilizer, F2: 50% NPK chemical fertilizer + biological fertilizer (nitroxin-mycorrhiza) and F3: 25% NPK chemical fertilizer + biological fertilizer (nitroxin mycorrhiza) and salicylic acid (S1: zero mg, S2: 200 mg/L, and S3: 400 mg/L). The results of this study showed that the application of three stages of supplementary irrigation, the combination of chemical and biological fertilizers, and the use of salicylic acid improved the yield of rapeseed. significantly increased compared to the control plant. Based on the results of this research, the highest oil yield from treatment levels I2 (992.40 kg/ha), F2 (979.72 kg/ha) and S3 (983.25 kg/ha) ) was obtained. Also, the highest percentage of seed oil was obtained due to the effects of experimental treatments I2, F2 and S3.