اثر فاصله ردیف و مقدار مصرف نیتروژن بر عملکرد و برخی ویژگی های مورفولوژیک و فیزیولوژیک کینوا

To investigate the effects of row spacing and nitrogen application rate on growth and yield of quinoa, a split plot experiment has been conducted in a randomized complete block design with three replications in Sabzevar during ۲۰۱۸. The studied factors include row spacing at three levels (۲۵, ۵۰, and ۷۵ cm) and nitrogen application rate at four levels (۰, ۵۰, ۱۰۰, and ۱۵۰ kg N ha-۱). Results show that the highest content of photosynthetic pigments, panicle length, number of seeds per plant, and biological yield belong to ۱۵۰ kg N ha-۱ treatment. However, the ۱۰۰ kg N ha-۱ treatment has had the highest number of panicles per plant (۱۹.۲۴) and ۱۰۰۰-seed weight (۳.۵۱ g). More row spacing has resulted in more chlorophyll contents, plant height, number of panicles, panicle length, and number of seeds per plant, but less ۱۰۰۰-seed weight, seed yield, and biological yield. The decrease in seed yield by increasing the row spacing to ۵۰ and ۷۵ cm has been ۱۸.۶۲ and ۵۰.۱۴%, respectively. The highest seed yield (۶۶۴۴.۵ kg ha-۱) has been produced via application of ۱۵۰ kg N ha-۱ at a row spacing of ۲۵ cm. With increasing row spacing, nitrogen requirement to produce maximum seed yield declines. Thus, the highest seed yield in ۷۵, ۵۰, and ۲۵ cm rows spacing are produced with the application of ۵۰, ۱۰۰, and ۱۵۰ kg N ha-۱, respectively. According to the results, the application of ۱۵۰ kg N ha-۱ and row spacing of ۲۵ cm is recommended for planting quinoa, Sajama genotype.

Keywords:

تراکم بوته , شاخص کلروفیل , طول پانیکول , کاروتنوئید , کینوا