Vol. 10, Issue 8 (2021)

Author(s):
Manzil Pandey, Parthendu Poddar, Triptesh Mondal, Pratonu Bandyopadhyay and Jaladhar Gorain

Abstract:
A field experiment was carried out during kharif season of 2018 at Pundibari, Coochbehar, West Bengal, to study the influence of different planting densities on the growth and yield of a heavy panicle rice cultivar CR Dhan 307 (Maudamani). The experiment was laid out in a randomized complete block design with three replications. Although transplanting of rice seedlings with the density of 15 cm × 15 cm did not produce the highest number of tillers m^-2 but registered the highest dry matter accumulation during the period of observation. Crop growth rate at 30-60 days after transplanting was found the highest under the spacing of 15 cm × 15 cm. But crop growth rate recorded under this treatment at 60-90 days after transplanting was statistically at par with the highest result obtained on that day of observation. Plant height at 90 days after transplanting under the spacing of 15 cm × 15 cm was also statistically at par with the maximum plant height obtained at 90 days after transplanting. Among the yield attributing characters, number of panicles m^-2 under rice transplanting with the spacing of 15 cm × 15 cm was statistically at par with the maximum number of panicles m^-2 (15 cm × 10 cm) recorded. Other major yield attributing characters (i.e., total number of grains panicle^-1 and number of filled grains panicle^-1) were found the highest under the planting density of 15 cm × 15 cm being significantly different from the other treatments. As an obvious effect of obtaining higher results in most of the growth and yield attributes, rice transplanting with the spacing of 15 cm × 15 cm showed maximum grain yield, grain-straw ratio and harvest index. In case of production economics, highest gross return, net return, input-output ratio and incremental cost-benefit ratio under the spacing of 15 cm × 15 cm described the superiority of this planting density for rice cultivar CR Dhan 307.