Yield, Dry Matter, Specific Gravity and Color of Three Bangladeshi Local Potato Cultivars as Influenced by Stage of Maturity

Enhancing aroma retention is pivotal for the production and exportation of aromatic rice in Bangladesh. In this study, a 2-year pot experiment was conducted to assess the effects of γ-aminobutyric acid (GABA) application on aromatic rice under shading and drought stress conditions. The rice variety, BRRI (Bangladesh Rice Research Institute) dhan80 was used as the planting material to investigate with the following eight treatments: (T₁) no GABA, shading, or drought stress treatment; (T₂) GABA application at 250 mg/L during panicle initiation; (T₃) shading at the grain filling stage; (T₄) drought stress at the grain filling stage; (T₅) shading and drought stress at the grain filling stage; (T₆) GABA application at 250 mg/L at panicle initiation and shading at the grain filling stage; (T₇) GABA application at 250 mg/L at panicle initiation and drought stress at the grain filling stage; and (T₈) GABA application at 250 mg/L at panicle initiation as well as shading and drought stress at the grain filling stage. A randomized complete block design was followed, with treatments replicated five times. Results revealed GABA application along with shading and drought stress significantly influenced most studied traits. Notably, 250 mg/L GABA application at panicle initiation, alongside shading and drought stress at the grain filling stage, resulted in favorable outcomes for the brown rice yield, head rice recovery, amylose and protein content, grain 2-acetyl-1-pyrroline content, grain aroma, and taste of BRRI dhan80 rice compared with the control group (T₁). However, the control treatment exhibited the highest grain yield compared with the other treatments. Overall, GABA application combined with shading and drought stress markedly improved grain quality and aroma of BRRI dhan80 but affected grain yield in an inverse manner.

Purpose The research was performed to assess the effect of vermicompost and tuber size on the storage behavior of potato during the ambient condition. Methods The research was consisted of two factors, i.e., factor A: vermicompost level (Vm-4): Vm₁: 0 t ha⁻¹ (control), Vm₂: 3 t ha⁻¹, Vm₃: 6 t ha⁻¹, and Vm₄: 9 t ha⁻¹; factor B: tuber size (T-5): T₁: 5–10 g, T₂: 10–20 g, T₃: 20–30 g, T₄: 30–40 g, and T₅: > 40 g. The research was conducted in a split-plot design where vermicompost levels were assigned to the main plots and tuber sizes to the subplots. Results Vermicompost had a significant effect on most of the processing quality contributing parameters of potato. Processing quality parameters increased with increasing vermicompost level irrespective of tuber size. Among the 20 treatment combinations, vermicompost @ 9 t ha⁻¹ with tuber size > 40 g exhibited the highest starch (23.81 mg g⁻¹ FW), antioxidant (478.84 Trolox µMol 100 g⁻¹ FW), polyphenol (96.133 GA mg 100 g⁻¹ FW), and the lowest reducing sugar (0.1020 mg g⁻¹ FW). In respect of ambient storage condition, starch decreased with increasing storage time; reducing sugar gradually increased with increasing storage time up to 40 days after storage (DAS) and after that slightly decreased and finally, potato became non-suitable for both table and processing purpose; antioxidant and polyphenol slightly increased up to 20 DAS and after that gradually decreased with increasing storage time. Conclusions Potato growers may use vermicompost for increasing and improving processing quality of potato.

Potato is the most important root crop in Bangladesh. The field production is very much lower compared to other developed countries. Pests and diseases hampered the production due to the prevailing climatic condition, which favors the development in Bangladesh of specific diseases. Among them Brown rot (Ralstonia solanacearum) is the most alarming disease at present and previous time. The major areas of Bangladesh have faced many hampers on this disease. The potato growers and businessmen of Bangladesh are facing much problems on this disease especially in case of export to other countries as Russia, Malaysia, Singapore, Indonesia, Sri Lanka, Thailand, Hong Kong, Vietnam, Maldives, Turkey, Azerbaijan, Ethiopia and Nigeria. But during last year Russian Government banned import potatoes from Bangladesh. So, from these perspectives, this concept paper was studied to evaluate the most appropriate status of this disease caused by organisms and its best control strategies to impart better production thinking for Bangladeshi potato growers, exporters and other related personnels.

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Achieving a consistent grain yield while preserving persistent aroma remains a substantial challenge in aromatic rice production in Bangladesh. To address this challenge, a field experiment was conducted at the agronomy research area of Sher-e-Bangla Agricultural University, Dhaka-1207, between 15 June 2022, and 25 November 2022 (Aman season). This study aimed to evaluate the influence of harvesting time on aromatic rice performance. The experiment, following a randomized complete block design with three replications, involved two factors: factor 1 comprised various rice varieties [Bangladesh Rice Research Institute (BRRI) dhan34, BRRI dhan70, BRRI dhan80, and Tulshimala], and factor 2 comprised three harvesting times [3, 4, and 5 weeks after flowering (WAF)]. Results revealed significant impacts of variety and/or harvesting time on grain yield, physicochemical characteristics, and aroma of aromatic rice. Notably, Tulshimala and BRRI dhan80 exhibited superior milling quality, biochemical properties, and aroma characteristics among the aromatic rice types. BRRI dhan70 and BRRI dhan80 displayed higher grain yield when harvested at 5 WAF. However, Tulshimala and BRRI dhan80 showed superiority in grain 2-acetyl-1-pyrroline (2-AP) concentration when harvested 3 or 4 WAF. Earlier harvesting at 3 and 4 WAF resulted in higher percentages of grain 2-AP (60.22% and 53.96%, respectively) compared with later harvesting at 5 WAF (used as check). In conclusion, varying harvesting times markedly impact the yield, physiochemical characteristics, and aroma of aromatic rice varieties, with earlier harvesting beneficial for aroma retention in Tulshimala and BRRI Dhan80 and later harvesting for increased economic yield in BRRI dhan70 and BRRI dhan80.