Adjusting planting time of Binadhan-17 in boro season

Shampa Rani Ghosh ,Kamrun Nahar,Md Imdadul Hoque,Sushan Chowhan,Md Moshiur Rahman ,Subhash Kanti Roy ,Dinesh Chandra Roy ,Md Khan Jahan Ali ,M Anowarul Islam

doi:10.25081/jp.2021.v13.6840

Abstract

Boro rice (grown in winter under irrigated condition) contributes to the major portion of rice production (over 50%) in Bangladesh. Binadhan-17 is a green super rice developed by BINA which requires 30% less nitrogenous fertilizer and water which is grown in aman season (primely produced under rainfed). Due to it’s increasing popularity and adoption rice growers are keen to cultivate it in boro season also. Taking account of the above situation, two field trials were conducted at Magura during November 2019 to May 2020 to investigate the effect of variety, sowing dates and their interaction. Factorial RCBD (Randomized Complete Block Design) was applied for experimentation. Two rice varieties: Binadhan-17 (V1), BRRI dhan58 (V2) and three sowing times: 30th November (T1), 10th December (T2), 20th December (T3) were used as treatments. 35 days old seedlings were transplanted in main field. Relevant agronomic and morphological data were statistically analyzed through Statistix 10.0. Combined effect of the above factors at farm exposed that, T1×V1 required longest days (159.33 days) to mature. but, comparatively short life cycle (149.97 days) was observed by T3×V2. Maximum grain was yielded (7.70 t/ha) by T2×V1 and minimum (5.74 t/ha) by T1×V1 treatment combination. Outcomes of on station revealed that, T1×V1 needed more days (158.00 days) to mature; conversely, alike duration was noted with T2×V2 (147.20 days) and T3×V2 (145.43 days) which matured quite earlier. T2×V1 produced the highest grain yield (7.41 t/ha) and T1×V2 the lowest (5.94 t/ha). Our results indicate that, planting of Binadhan-17 on 10th December may give insect-disease free grains with optimum yield in context of Magura region. Farmers will be financially benefited if they cultivate this variety in the boro season in lieu of aman; due to higher yield

Highlights

Three major rice seasons namely aus, aman and boro are the rice cultivating time in Bangladesh
Binadhan-17 is a green super rice developed by BINA which requires 30% less nitrogenous fertilizer and water which is grown in aman season
Two rice varieties: Binadhan-17 (V1), BRRI dhan58 (V2) and three sowing times: 30th November (T1), 10th December (T2), 20th December (T3) were used as treatments. 35 days old seedlings were transplanted in main field

Summary

Introduction

Three major rice seasons namely aus, aman and boro are the rice cultivating time in Bangladesh. All these constitute 100% of total rice production and grown in three overlapping seasons. Favors in getting higher rice yield during this time of the year. Total area under boro crop has been estimated 118, 32, 309 acres (47, 88, 276 hectares) in 2018-19 as compared to 120, 07, 983 acres (48, 59, 367 hectares) of the last year (2017-18). The main reason is, boro rice is totally dependent on supplemental irrigation which requires a huge amount of ground water farmers are trying to grow an alternative crop in the pattern which is water saving preferably pulse and oil seeds under zero tillage. Mean national rice yield (milled equivalent) of Bangladesh was 3.16 t/ha during this period (BBS, 2019)

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