تاثیر تقسیط مصرف کودهای شیمیایی بر عملکرد و خصوصیات رشدی ارقام سویا

In order to investigate effects of split use of N.P.K fertilizer in different consumption times on growth characteristics and yield of different soybean cultivars, an experiment was conducted in 2013 at Agricultural Research Station of SANRU. A Factorial experiment based on randomized completely design with three replications was used. Treatments included four cultivars (Sari, 032, 033 and Telar) and three levels of N.P.K fertilizer (after planting, 50% flowering and 50% of pods), respectively. Fertilizer treatments in each time 50, 100 and 150 kg ha-1 was applied and traits such as plant height, seed yield, 1000 seed weight and harvest index were evaluated. Results showed significant differences between treatments at 5% level. Maximum plant height achieved from cultivar 032 in third stage of using fertilizer. Cultivar Sari yielded well under third stage of consuming fertilizer. The highest 1000 seed weight and harvest index were obtained by Sari and 033, respectively.