EFFECT OF DECAPITATION AND PGRS ON PARAMETERS OF PLANT GROWTH ANALYSIS OF CLUSTER BEAN (CYAMOPSIS TETRAGONOLOBA TAUB.) CV. PUSA NAVBAHAR

An experiment was conducted to study the “Effect of decapitation and PGRs on growth and seed yield of cluster bean (Cyamopsis tetragonoloba Taub.)” cv. Pusa Navbahar with 3 (three) decapitation treatments and 4(four) Plant growth regulators each at two concentration with control in factorial randomized design with three replication at Regional Horticultural Research Station, ASPEE College of Horticulture and Forestry, Navsari Agricultural University, Navsari during summer 2014. The results showed significant differences among the yield parameters due to decapitation treatment. Growth parameters viz; Days to 50 % flowering, plant height and number of leaves per plant were found nonsignificant at 75 and 90 DAS. The effects of decapitation and PGR’s on physiological parameters viz; LA and LAI of plant were found non-significant at 60 and 90 DAS. At 60 DAS fresh weight and dry matter content of plant were found non-significant. Whereas, at 60 DAS CGR values were found significant (0.0016 g/cm2 /day) under the treatment D3 (decapitation at 45 DAS) whereas, NAR values were found non-significant in analysis. Under Plant growth regulators treatments Physiological parameters viz; LA, LAI and fresh weight and dry matter content of plant were also found 60 and 90 DAS registered non-significant results. Whereas, CGR (0.0019 g/cm2 /day) and NAR values (0.0274 g/cm2 /day) were found significant under the treatment P1 (Control). Different combination of decapitation and PGRs treatments recorded significant results on physiological parameters at various growth stages viz; LAI (0.0428) by the treatment combination of D2P2. Whereas, LA and LAI at 60 DAS and 90 DAS recorded non-significant results in different combinations except CGR (0.0021 g/cm2 /day) and NAR (0.0311 g/cm2 /day) at 60 DAS which were found significant due to interaction between decapitation and PGRs treatments. At all the growth stages, interaction between D1P1 (without decapitation and no spray) and D3P2 (Decapitation at 45 DAS and GA3 25 mg l-1 ) recorded significantly higher values for all the physiological parameters. Fresh weight of plant and dry matter content of plant were found non-significant in analysis .