EFFECT OF BIO-REGULATORS AND PLANT GROWTH PROMOTING BACTERIA ON GROWTH ATTRIBUTES OF INDIAN BEAN

Abstract

A field experiment was carried out to know the effect of bio-regulators and plant growth
promoting bacteria (PGPB) on growth, yield and quality of Indian bean during kharif
season 2017 at Horticulture Farm, S.K.N. College of Agriculture, Jobner (Jaipur).The
experiment consisted of twenty treatment combinations including five bio-regulators (control,
brassinoids 0.5 ppm, brassinoids 1.0 ppm, salicylic acid 100 ppm and salicylic acid 150 ppm)
and four plant growth promoting bacteria (control, Rhizobium, Pseudomonas and Rhizobium +
Pseudomonas). Experiment laid out in randomized block design with three replications. The
results of the study clearly indicated that application of brassinoids 1.0 ppm to the Indian bean
significantly increased the plant height (77.56 cm), number of branches per plant (9.82), dry
matter accumulation(90.50,161.72 and 215.0 g/m row length) at 45, 60 and 75 days after
sowing, respectively, CGR (26.38 and 19.73 g/m2/day) at 45-60 and 60-75 days after sowing,
chlorophyll content in leaves (1.942 mg/g) and leaf area (3093 cm2) as compared to control.
Similarly, seed inoculation with Rhizobium + Pseudomonas also significantly increased the
plant height (76.70 cm), number of branches (10.80), dry matter accumulation (92.17,161.51
and 218.76 g/m row length) at 45, 60 and 75 days after sowing, respectively, CGR (25.68 and
21.20 g/m2/day) at 45-60 and 60-75 days after sowing, chlorophyll content in leaves (1.931
mg/g) and leaf area (3027 cm2) than control (no inoculation).