This field experiment was executed as the split plot in a randomized complete block design with three replications in 2014. In a red bean irrigated farm, halt irrigation was implemented in main plots and the treatments included the control (full irrigation) and halt irrigation at vegetation, flowering, and pod development stages. In subplots utilization of biofertilizers were applied at four cases of control, phosphorus solubilizing bacteria, potassium solubilizing bacteria, and combined application of these bacteria in soil. Results showed that halt irrigation and biofertilizers had significant interaction on red bean biomass. Normally, to achieve the highest biomass full irrigation and application of phosphorus and potassium solubilizing bacteria (8023 and 7978 kg ha-1) are suggested. But the use of biofertilizers instead of chemical fertilizers led to more water efficiency under low water condition. Finally, our results showed that maximum biomass in red bean (about 7985 kg. ha-1) was recorded in ecological nutrition management under limited water resources. In other words, halt irrigation at flowering stage was compensated by Bio-P and Bio-K fertilizer application as a logical method to mitigate and moderate biomass losses about 37%. Manuscript profile

In order to investigate the effect of seed pretreatment with growth regulators on biochemical characteristics of red bean genotypes, a factorial experiment was carried out in a randomized complete block design with three replications. In this research, seed pretreatment with growth regulators namely salicylic acid (SA) and naphthalene acetic acid (NAA) were applied at four levels including P0: control (pretreated with distilled water); P1: pretreated with NAA hormone (0.5 mM/lit); P2: pretreated with SA hormone (0.7 mM/lit); P3: pretreated with combination of NAA hormones (0.5 and 0.7 mM/lit) and two genotypes of red beans (KS31169 and D81083). The ANOVA results showed that the simple effects and the interactive effects of genotypes × priming with growth regulators on all traits were significant except the relative chlorophyll content. The results of mean comparison for the interactive effect of genotypes and priming with growth regulators showed that application of SA increased the amount of chlorophyll a in D81083 genotype. The highest rate of chlorophyll b and total chlorophyll belonged to D81083 genotype with application of NAA. The rates of flavonoids and carotenoids decreased by using growth regulators, therefore the highest rates of these traits were observed in control × D81083 genotype. Seed priming with combined treatments (NAA+SA) led to the highest stability of cytoplasmic membrane in KS31169 genotype. In general, the results of the present study indicated that the use of growth regulators as seed pretreatment will increase the main pigments of photosynthesis and cytoplasmic membrane stability. Manuscript profile