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Articles by Pulak Kumar Sarkar
Total Records ( 2 ) for Pulak Kumar Sarkar
  Pulak Kumar Sarkar , Md. Shahidul Haque and M. Abdul Karim
  The experiment was carried to investigate the effect of plant growth regulators on the growth of soybean. Soybean (cv. BS-3) plants were sprayed with 0, 100 or 200 ppm of GA3 and IAA at three different times (20 and/or 42 days after sowing). The results indicate that physiological characters e.g. leaf area index (LAI), crop growth rate (CGR), relative growth rate (RGR) and net assimilation rate (NAR) were influenced by the application of the growth regulators. GA3 and IAA at 100 ppm significantly increased LAI, CGR, RGR and NAR. IAA at 200 ppm increased NAR. Double spraying at 20 and 42 DAS performed better than single spraying at 20 DAS and spraying at 42 DAS. Double spraying with GA3 and IAA had the highest CGR, NAR, LAI. On the other hand, single spraying with GA3 produced highest RGR and 200 ppm of IAA produced highest NAR. Spraying at 42 DAS of GA3 and IAA produced highest leaf area index and CGR over the single and double spraying. LAI, RGR, CGR and NAR progressed in similar patterns, regardless of the treatments. The treated plants attained high LAI, RGR, CGR and NAR than the control. This study clearly shows that 100 ppm of GA3 and IAA treated plants performed better than control and other treated plants.
  Pulak Kumar Sarkar , Md. Shahidul Haque and M. Abdul Karim
  Effect of plant growth regulators on yield of soybean was investigated. Plants of soybean cv BS-3 were sprayed at three different times with two concentrations (100 and 200 ppm) of gibberellic acid (GA3) and indole acetic acid (IAA). GA3 at 100 ppm had regulatory effect to enhance the plant height, number of branches, number of leaves, leaf area per plant, number of flowers, number of pods, percentage of fruit set, number of seed per plant, seed yield per plant, 100-seeds weight and seed yield (t ha-1). On the other hand, 100 ppm IAA produced the highest plant height, number of flowers, number of pods, percentage of fruit set, number of seed per plant, seed yield per plant and seed yield (t ha-1), as compared to other plant growth regulators and control. IAA at 200 ppm increased number of branches, number of leaves, leaf area per plant, 100-seeds weight and net assimilation rate.
 
 
 
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