Effects of nitrogen and phosphorus fertilizers on yield and yield components of bean (Phaseolus vulgaris L.) grown in Boyerahmad region of Iran.

摘要

The present research was conducted to study the effects of different rates of nitrogen and phosphorus fertilizers on yield and yield components of bean(Phaseolus vulgaris L.). A field experiment was conducted in factorial design based on a randomized complete block with nine treatments and three replications in Boyerahmad region of Iran during spring 2009. The treatments included three doses of nitrogen (0, 34.5 and 69 kg/ha) supplied through urea fertilizer and three levels of phosphorus (0, 48 and 96 kg/ha) applied through triple super phosphate fertilizer. The results showed that the effects of nitrogen and phosphorus fertilizers on yield and yield components of bean were highly significant. The treatment combinations of nitrogen and phosphorus viz., N₆₉P₀, N₀P₉₆ and N_34.5P₉₆ produced maximum grain yield of bean to the tune of 5280, 5266 and 5096 kg/ha, respectively. The highest biological yield (11750 kg/ha) of bean was recorded with the application of 96 kg P/ha with no nitrogen fertilizer treatment (N₀P₉₆). The treatment combinations of N₀P₄₈, N_34.5P₀, N_34.5P₄₈, N_34.5P₉₆, N₆₉P₀ and N₆₉P₄₈ kg/ha did not differ significantly in terms of biological yield of bean. The effect of nitrogen fertilizer on the number of seeds per pod was not significant, whereas the effect on number of pods per plant was highly significant. The 100-seed weight was also influenced by nitrogen fertilizer significantly in bean. The economical and biological yields, 100-seed weight and number of seeds per plant of bean were significantly affected by phosphorus. The number of seeds per pod of bean was not influenced by phosphorus fertilizer.