Effect of Dates of Sowing and Topping on SeedProduction of Tossa and White Jute in Red andLaterite Zone of West Bengal

摘要

Aim: To assess the effects of date of sowing and topping on seed production of tossa and white jute.Design: Split plot.Place and Duration of Study: Field experiment was conducted during Kharif season of 2014 and 2015 at Regional Research Sub-station, Raghunathpur, Bidhan Chandra Krishi Viswavidyalaya, Purulia, West Bengal, India.Methodology: Two separate experiments were carried out on tossa jute, Corchorus olitorius L.(cv. JRO-8432) and white jute, Corchorus capsularis L. (cv.JRC-698), each having 3 replications, with 3 main plots of dates of sowing (D_(1)-15~(th) June, D_(2)-15~(th) July and D_(3)-15~(th) August) and 4 sub plots for topping treatments [T_(1)-No topping, T_(2)-Topping at 30 Days After Sowing (DAS),T_(3)-Topping at 45 DAS and T_(4)-Topping at 60 DAS] under rainfed condition.Results: In both the jute varieties, the first date of sowing (15~(th) June) proved superiority over other sowing dates irrespective of topping, however, topping at 45 DAS revealed best results as compared to other topping treatments in both the years. First date of sowing (15~(th )June) along with topping at 45 DAS (30~(th) July) recorded the highest number of primary branches plant~(-1), number of pods plant~(-1)and the highest seed yield which contributed to significantly higher gross and net return in both the varieties in both the years of experimentation.Conclusion: Early sowing i.e. around 15~(th )June and topping at 45 DAS could be recommended for enhancement of total seed production in olitorius as well as capsularis jute in red and laterite zone of West Bengal.