Investigating changes in yield and yield components of white beans under the conditions of biological fertilizers application

In order to investigate the effect of application nitrogen and phosphorus biofertilizers on the yield and yield components of white beans, a study was conducted at Yasouj University during 2022. The experiment was conducted as a factorial based on a completely randomized block design with three replications. The experimental treatments included four levels of nitroxin and phosphate barvar 2 biofertilizers, and each at four levels (0, 80, 100, and 120% of the recommended amount). The results showed that the effect of nitrogen and phosphorus fertilizer treatments was significant on all traits. The interaction effect of nitrogen and phosphorus fertilizers on the number of pods per plant, seed yield, biological yield and harvest index was significant. The mean comparison showed that the increase in the application rate of nitroxin and phosphate barvar 2 to 120% led to an increase in growth and, as a result, an increase in the morphological characteristics of the plant, such as the plant height and number of sub-branches in plant. On the other hand, with the increase in the application rate of both fertilizers, the grain yield components have also increased, which has led to an increase in the final grain yield. At the level of both types of nitroxin fertilizer and phosphate barvar 2, the application of 120% led to the highest amount of 100 seed weight of 30 and 28.83 grams, respectively. The highest amount of seed yield and biological yield of 1824 and 5450 kg.ha-1, respectively, were obtained in the application of 120% of Nitroxin and Phosphate barvar 2 treatments, and after that, it led to the highest harvest index as well. Therefore, it was determined that in order to obtain the highest seed yield in white bean, 120% of Nitroxin and Phosphate barvar 2 should be applied.