PAPPALA SWARAJ PAUL, GANGADHAR NANDA* AND NILANJAYA
Department of Agronomy, PG College of Agriculture, RPCAU, Pusa-818425 (Bihar), India
Department of Plant Breeding and Genetics, PG College of Agriculture, RPCAU, Pusa-818425 (Bihar), India
*(e-mail : gnanda@rpcau.ac.in)
(Received : 16 February 2022; Accepted : 24 March 2022)
SUMMARY
A field experiment was carried out at Forage Research Block of Cattle Farm, Animal Production Research Institute, Dr. Rajendra Prasad Central Agricultural University, Pusa, Samastipur, Bihar during Rabi season, 2020-21 to study the effect of eleven treatments consisting of foliar spray of six different plant growth regulators (PGRs) at different concentrations (triacontanol @ 10 ppm, triacontanol @ 20 ppm, mepiquat chloride @ 200 ppm, mepiquat chloride @ 300 ppm, salicylic acid @ 100 ppm, salicylic acid @ 200 ppm, naphthalene acetic acid @ 20 ppm, fenoxaprop-p-ethyl @ 4 g a.i./ha, gibberellic acid @ 200 ppm, gibberellic acid @ 400 ppm) and a control (spray of water) on growth and yield of single cut fodder oat. The experiment was carried out in a randomised complete block design with three replications. Result indicated that plant height and number of tillers per meter row length at 60 DAS and at harvest and SPAD reading at 60 DAS was higher with application of naphthalene acetic acid @ 20 ppm than other treatments. Similarly, this treatment recorded higher leaf DMA at 60 DAS and at harvest and stem DMA and total DMA at 60 DAS. However, application of mepiquat chloride @ 300 ppm recorded higher stem DMA and total DMA at harvest and produced higher green as well as dry fodder yield than other treatments.
Key words: Plant growth regulators, fodder oat, mepiquat chloride, growth, yield