بررسی اثر تنش شوری و نیتروژن بر عملکرد و اجزای عملکرد گیاه ارزن پیشاهنگ (panicum)

هدف از این مطالعه بررسی اثرات تنش‌های توامان شوری و کود نیتروژن بر عملکرد و اجزاء عملکرد گیاه ارزن بود. آزمایش در سال 1400 در قالب طرح کرت خرد شده بر پایه بلوک‌های کامل تصادفی در سه تکرار در مزرعه تحقیقاتی دانشگاه ایلام انجام شد. تیمارهای آزمایش شامل چهار سطح شوری آب آبیاری شامل 0.63، 3، 5 و 8 دسی‌زیمنس بر متر (s1، s2، s3 و s4) به عنوان تیمارهای اصلی و سه سطح کود نیتروژن شامل 100، 75 و 50 درصد نیاز کودی (n1، n2 و n3) به عنوان تیمارهای فرعی بود. نتایج نشان داد که اثر سطوح تنش شوری اعمال شده بر صفت‌های نسبت برگ به ساقه و طول پانیکول در سطح احتمال پنج درصد و برای مابقی صفات در سطح احتمال یک درصد معنی‌دار بود. همچنین تیمارهای مختلف نیتروژن به جز در صفت‌های نسبت برگ به ساقه، طول پانیکول و ارتفاع بوته تاثیر معنی‌دار بر صفات مورد مطالعه داشت. اثر متقابل تنش‌های شوری و نیتروژن بر وزن هزار دانه، وزن اندام هوایی، عملکرد دانه و شاخص برداشت در سطح احتمال یک درصد معنی‌دار بود و بر نسبت برگ به ساقه، طول پانیکول و ارتفاع بوته تاثیر معنی‌داری نداشت. بیشترین عملکرد ارزن به مقدار 3.76 تن در هکتار در s1n1 و کمترین عملکرد به مقدار 2.53 تن در تیمار s4n1 اتفاق افتاد.

investigating the effect of salinity and nitrogen stress on the yield and yield components of panicum millet

introduction fodder plants play an important role in resolving the needs of livestock and as a result, satisfying the human need for livestock products. physiological mechanisms of plant response to different stresses such as salinity and drought stress are new and powerful tools for breeding programs.unfavorable management of irrigation causes the creation of secondary salinity in agricultural lands, which ultimately leads to the wastage of water resources and the reduction of agricultural lands. deficiency of proper quality irrigation water along with underground brackish water resources and insufficient amounts of rainfall has caused the loss of more soil resources.therefore, it is necessary not only to make serious efforts to improve the use of quality water resources (to reduce the salinization of agricultural lands), but also to expand the production of crops in these areas.during the last decades, various solutions have been used to exploit saline water and soil in iran. saline organisms are plants that are able to complete their life cycle under salinity stress conditions. the objective of this study was to investigate the effects of combined stresses of irrigation salinity and nitrogen fertilizer on the yield and yield components of millet plant.methodologythe field experiment was conducted as a split plot experiment in a randomized complete block design with three replications at the research farm, faculty of agriculture, ilam university during growing season in 2022.treatments included four levels of irrigation salinity including 0.63, 3, 5, and 8 ds/m (s1, s2, s3 and s4) as main plots and three nitrogen fertilizer levels including; 100, 75 and 50 % of fertilizer requirement (n1, n2 and n3) as subplots.then plots with dimensions of 2 x 2 meters were created, the needed panicum millet seeds were disinfected with appropriate fungicides from the agriculture department of jihad keshavarzi, ilam province, and the planting process was carried out manually and based on the density used in ilam (about 30 up to 35 kilograms for fodder millets) was done on june 25, 1400.the amount of fertilizer used was based on the soil test and the required amount, 50% of which was given to the soil at the beginning of the growing season and the remaining 50% at the 5th stage of leafing in the form of water solution.