Biochar – A climate smart practice for milling traits and aroma of fragrant rice under drought stress with different time of harvest
Rajesh Chakraborty¹*, Sakagami Jun-Ichi², Tuhin Suvra Roy¹, Md Yeakub Khan³, Eti Chakraborty4,Gulshanara Khatun¹, Md. Mehedi Hasan Sumon5 and Puja Sarkar Moly6
1 Department of Agronomy, Sher-e-Bangla Agricultural University, Dhaka, Bangladesh.
2 Department of Agricultural Sciences and Natural Resources, Kagoshima University, Japan.
3 TRB-BRRI Project, Plant Breeding Division, Bangladesh Rice Research Institute, Gazipur, Bangladesh.
4 Department of Soil Science, Sher-e-Bangla Agricultural University, Dhaka, Bangladesh.
5 Ex-Postgraduate Student, Department of Agronomy, Sher-e-Bangla Agricultural University, Dhaka, Bangladesh.
6 Faculty of Agriculture, Sher-e-Bangla Agricultural University, Dhaka, Bangladesh.
*Corresponding author email: firstname.lastname@example.org
Received: 15th April 2021; Accepted: 25th May 2021
A pot experiment was conducted at research area under plastic net house of Sher-e-Bangla Agricultural University, Dhaka-1207 during 2019-20. BRRI dhan50 was used as planting material. The experiment was laid out in 2x2x3 factorial design with five replications and comprised of three factors viz., Factor-1 (Biochar-2 levels): B1 = (Control) 0.0 t ha-1, B2 = 5.0 t ha-1; Factor-2 (Drought stress-2 levels): D1 = At reproductive stage, D2 = At grain filling stage and Factor-3 (Time of harvest-3 levels): H1 = 3 weeks after flowering, H2 = 4 weeks after flowering and H3 = 5 weeks after flowering. Application of biochar @ 5tha-1 along with drought stress imposed at grain filling stage and crop harvested 5 weeks after flowering showed the best result for brown rice yield, head rice recovery, amylose content, protein content, grain aroma and taste of BRRI dhan50. Application of biochar also increased soil organic carbon content. It can be concluded from the present study that, biochar application can help in reducing atmospheric carbon emitted from puddled rice soil in normal field condition under climate smart technology.
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