Author(s):

Bharati Upadhaya and Navnit Kumar

Abstract: A field experiment was conducted during the spring season of 2017 at Research farm of Sugarcane Research Institute, Dr. Rajendra Prasad Central Agricultural University, Pusa (Samastipur), Bihar to study the effect of plant growth regulators on germination and growth parameters on sugarcane (Saccharum spp. hybrid complex). The experiment was laid out in randomized block design and replicated thrice. The treatment comprised of ten treatments viz., conventional planting/farmers practice (T1), planting of setts after overnight soaking in water (T2), planting of setts after overnight soaking in cattle dung, cattle urine and water slurry in 1: 2: 5 ratios (T3), planting of setts after overnight soaking in 50 ppm ethrel solution (T4), planting of setts after overnight soaking in 100 ppm ethrel solution (T5), T1 + GA3 spray @ 35 ppm at 90, 120 & 150 DAP (T6), T2 + GA3 spray @ 35 ppm at 90, 120 & 150 DAP (T7), T3 + GA3 spray @ 35 ppm at 90, 120 & 150 DAP (T8), T4 + GA3 spray @ 35 ppm at 90, 120 & 150 DAP (T9) and T5 + GA3 spray @ 35 ppm at 90, 120 & 150 DAP (T10). Results revealed that planting of setts after overnight soaking in 50 ppm ethrel solution recorded higher periodic germination percentage followed by planting of setts after overnight soaking in 50 ppm ethrel solution + GA3 spray @ 35 ppm at 90, 120 & 150 DAP. Planting of setts after overnight soaking in 50 ppm ethrel solution followed by GA3 spray @ 35 ppm at 90, 120 & 150 DAP showed significantly higher leaf area index at all the growth stages. Plant height was found to be non-significant except at 210 and 240 DAP. Dry matter accumulation and root dry weight was found significantly higher in planting of setts after overnight soaking in cattle dung, cattle urine and water slurry in 1: 2: 5 ratios followed by GA3 spray @ 35 ppm at 90, 120 & 150 DAP.

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