Author(s):

G Karuppusamy, P Jeyakumar, CN Chandrasekhar, P Jayamani and NO Gopal

Abstract: A field study was conducted to investigate the impact of different growth regulating compounds and nutrients on morpho-physiological characters and yield traits in pigeonpea. The experiment was laid out in FRBD design with three replications. The treatments consisted of growth retardants viz., mepiquat chloride and chlormequat chloride, each 500 ppm sprayed at vegetative stage followed by application of different PGRs (Salicylic acid @ 100 ppm, Brassinosteroid @ 0.1 ppm, NAA @ 40 ppm), Nutrients (ZnSO₄ @ 0.5% + Boric acid @ 0.3%, MAP @ 2%, TNAU Pulse Wonder @ 1%) and two Nutrient consortia mixture sprayed at flower initiation and 15 days thereafter. Observations on various morpho-physiological parameters and yield traits were recorded at different growth stages. The results revealed that, the combined effect of Chlormequat chloride and nutrient consortia has significantly influenced the plant height, root length, chlorophyll index, photosynthetic rate, number of flowers plant^-1 and number of pods plant^-1 of pigeonpea.

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