Author(s): K. SENGUPTA, N. C. BANIK, S. BHUI ANDS. MITRA

Abstract: A field experiment was conducted in two consecutive years at University Farm (New Alluvial zone) of Bidhan Chandra Krishi Viswavidyalaya, Nadia, West Bengal during the summer season of 2007 and 2008 at upland situation on sandy-loam soil, almost neutral in soil reaction (pH 6.90) having 0.68% organic carbon, 28.45 kg/ha available P2O5 and 135.51 kg/ha available K2O to study the effect of brassinolide on growth and yield of summer green gram crop. The crop was fertilized with recommended dose of N-P2O5-K2O at 20-40-40 kg/ha and received only one light pre-sowing irrigation. The experiment was carried out in RBD with 8 treatments and 3 during the summer season under limited soil moisture condition. The result revealed that brassinolide (plant growth regulator) had a significant influence on growth and seed yield of the crop. The crop sprayed with 0.25 ppm brassinolide yielded better than other concentrations of brassinolide and the highest seed yield was obtained with the treatment where it was sprayed twice. The growth parameters like plant height, LAI and dry matter accumulation per unit area were significantly higher in the treatments where brassinolide were sprayed. Yield differences due to different treatments were mainly due to significant effect of the plant growth regulator (brassinolide) on LAI and dry matter accumulation in aerial plant parts and the number of pods per unit area. The experimental results revealed that application of plant growth regulator (brassinolide) is an effective management practice to increase the yield of green gram crop grown under limited moisture condition..

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