http://103.7.193.12:8080/xmlui/handle/123456789/131 2026-07-26T09:57:05Z 2026-07-26T09:57:05Z ISLAM, ST. TANJINA http://103.7.193.12:8080/xmlui/handle/123456789/2157 2026-06-15T07:55:48Z 2022-09-01T00:00:00Z

HERBICIDE OPTIONS FOR EFFECTIVE WEED MANAGEMENT IN ZERO-TILL WHEAT, MAIZE AND DIRECT-SEEDED AMAN RICE UNDER WHEAT MUNGBEAN-RICE AND MAIZE-MUNGBEAN-RICE CROPPING SYSTEMS HERBICIDE OPTIONS FOR EFFECTIVE WEED MANAGEMENT IN ZERO-TILL WHEAT, MAIZE AND DIRECT-SEEDED AMAN RICE UNDER WHEAT MUNGBEAN-RICE AND MAIZE-MUNGBEAN-RICE CROPPING SYSTEMS ISLAM, ST. TANJINA The information on the efficacy and economics of different pre-and post-emergence herbicides used alone or sequentially in the conservation agriculture (CA)-based zero-till (ZT) wheat, maize and direct seeded (DSR) rice production system is still sporadic or lacking in Bangladesh. In the context, an observation entitled ‘Herbicide Options for Effective Weed Management in Zero-Till Wheat, Maize and Direct-Seeded Aman Rice under Wheat-Mungbean Rice and Maize-Mungbean-Rice Cropping Systems’ was conducted in consecutive two years of 2017-2018 and 2018 2019. This observation consisted of three experiments; Expt. 1. Efficacy and Economics of Different Post-Emergence Herbicides for Controlling Weeds in Wheat under Zero-Till Condition; Expt. 2. Efficacy and Economics of Different Pre-and Post-Emergence Herbicides for Controlling Weeds in Maize under Zero-Till Condition and Expt. 3. Efficacy and Economics of Different Pre-and Post-Emergence Herbicides for Controlling Weeds in Zero-Till Direct Seeded Aman rice. Treatments of the first experiment were: ready-mix formulation (Sulfosulfuron + Metsulfuron); ready-mix formulation (Mesosulfuron + Idosulfuron); Pinoxaden; ready-mix formulation (Carfentrazone + Isoproturon); Pinoxaden + Metsulfuron; Pinoxaden + Carfentrazone; Halosulfuron; Halosulfuron + Pinoxaden; Weedy check and Weed free. After two years of observation, the results of the study revealed that the highest yield of ZT-wheat (4860 kg ha-1) was recorded in weed-free treatment in the first season, which was statistically similar to Pinoxaden + Metsulfuron in both years (4643.33 and 5683.33 ha-1) and the lowest grain yield (2595 and 3880 kg ha-1) was recorded in weedy check plots. From an economic point of view, the maximum net benefit (121386 Tk ha-1) in the first year was recorded in Pinoxaden + Metsulfuron treatment, but in the second season, the maximum benefit (212578 Tk ha-1) was recorded in Halosulfuron + Pinoxaden applied plot. In 2nd experiment, treatments were two pre-emergence herbicides (Pendimethalin and Atrazine) and a control (without pre-emergence herbicide) and five post-emergence herbicides (i.e., Atrazine; Tembotrione; Halosulfuron; Tembotrione + Atrazine and Halosulfuron + Atrazine) and a control (without post-emergence herbicide). After two years of observation, the findings of the study revealed that sequential use of pre- and post-emergence herbicides significantly influenced the grain yield of ZT-maize by effectively controlling all types of weeds. In the first year, the highest grain yield was recorded in the sequential application of Pendimethalin applied immediately after maize seeding with post-emergence herbicides Tembotrione + Atrazine (13.9 t ha-1) applied at 15 DAS. However, in the second year, the sequential application of Atrazine applied immediately after maize seeding with post-emergence herbicides Tembotrione (17.2 t ha-1) applied at 15 DAS performed the best, followed by Atrazine as pre-emergence and Tembotrione + Atrazine (16.6 t ha-1) applied as post emergence and the lowest was recorded in the control plot (10.9 t ha-1). From the economic point of view, the maximum net benefit (two years’ averaged) was recorded from Pendimethalin & Atrazine (both applied as pre-emergence) and Atrazine (as post-emergence) (367807 & 362907 Tk. ha-1) applied plots, followed by Pendimethalin & Atrazine (both as pre-emergence) and Tembotrione + Atrazine (as post-emergence) (362582 & 363832 Tk.ha-1), while the minimum net benefit (258907 Tk. ha-1) was recorded in weedy check treatment. In 3rd experiment, treatments were two pre emergence herbicides (i.e., Pendimethalin and Oxadiazon) and a control (without pre-emergence herbicide) and five post-emergence herbicides (i.e., No-post-emergence; Bispyribac Sodium; Bispyribac Sodium + Pyrazosulfuron; Fenaxoprop + Ethoxysulfuron and Fenoxoprop fb Halosulfuron. Results of the two years of the study showed that all types of weeds were effectively controlled by the sequential use of pre-and post-emergence herbicides. Considering plant growth, yield and yield attributing of ZT DSR Aman rice, all parameters were significantly influenced by pre emergence herbicides (Pendimethalin & Oxadiazon) applied immediately after rice seeding followed by post emergence herbicides (sole application of Bispyribac-sodium, and combination of Bispyribac-sodium + Pyrazosulfuron, Fenaxoprop + Ethoxysulfuron and Fenoxoprop fb Halosulfuron) applied as post-emergence. Among these herbicides, the highest grain yield in both years was found in the sequential use of pre-emergence herbicide Pendimathalin followed by the application of post-emergence herbicides ‘Bispyribac Sodium + Pyrazosulfuron’ (5.3 t ha-1 in the first year) and ‘Bispyribac-sodium’ (5.2 t ha-1 in second year). From the economic point of view, the maximum net benefit was recorded in the plot, where Pendimethalin was applied as pre-emergence in combination with Bispyribac-sodium + Pyrazosulfuron (two years’ average 100179 Tk. ha-1) applied as post-emergence, followed by Oxadiazon as pre-emergence in combination with the sole application of Bispyribac-sodium (two years’ average 95873 Tk. ha-1). Based on the two years of yield and the economic benefit of these three observations the combination of herbicides Pinoxaden + Metsulfuron and Halosulfuron + Pinoxaden may be recommended for weed control in ZT wheat. In the case of ZT-maize, the sequential application of Pendimethalin and Atrazine applied as pre-emergence immediately after sowing of maize seeds in combination with sole Atrazine or in combination with Tembotrione + Atrazine as post-emergence may be recommended for weed control in the ZT-maize. While, in ZT DSR Aman rice, the sequential application of Pendimethalin and Oxadiazon as pre-emergence immediately after sowing of rice seeding in combination with Bispyribac + Pyrazosulfuron or Fenaxoprop + Ethoxysulfuron or sole application of Bispyribac Sodium as post-emergence may be recommended for weed control in ZT-DSR Aman rice. HERBICIDE OPTIONS FOR EFFECTIVE WEED MANAGEMENT IN ZERO-TILL WHEAT, MAIZE AND DIRECT-SEEDED AMAN RICE UNDER WHEAT MUNGBEAN-RICE AND MAIZE-MUNGBEAN-RICE CROPPING SYSTEMS; A Dissertation By MST. TANJINA ISLAM, Reg. No. 1705204, Session 2017; Submitted to the Hajee Mohammad Danesh Science and Technology University, Dinajpur In partial fulfilment of the requirement for the degree of DOCTOR OF PHILOSOPHY IN AGRONOMY, DEPARTMENT OF AGRONOMY, HAJEE MOHAMMAD DANESH SCIENCE AND TECHNOLOGY UNIVERSITY DINAJPUR-5200; SEPTEMBER 2022.

2022-09-01T00:00:00Z HAQUE, MD. AZAMUL http://103.7.193.12:8080/xmlui/handle/123456789/2155 2026-06-14T08:34:21Z 2022-06-01T00:00:00Z

MORPHO-PHYSIOLOGICAL CHARACTERIZATION OF WILD RELATIVES OF RICE CONFERRING TOLERANCE TO SALINITY AND DROUGHT HAQUE, MD. AZAMUL Varietal breakthrough in rice contributed very significantly to the increased rice production in Bangladesh over the years despite of many challenges including abiotic stresses like salinity and drought. However, the recent trend shows a yield ceiling of the varietal improvement of rice, especially under stress condition. The use of untapped resources of wild species of rice against biotic and abiotic stresses is still largely unexplored under Bangladesh context. This study evaluated 40 accessions of wild species of rice through assessing their morpho physiological behaviors and allelic diversity conferring tolerance to salinity and drought stresses. The whole work consisted of four pot experiments and one laboratory experiment conducted during 2018-2020. In the 1st pot experiment 40 accessions under 10 wild species of rice namely Oryza rufipogon, O. alta, O. nivara, O. latifolia, Poterecia coarctata, O. glaberrima, O. longistaminata, O. officinalis, O. punctata and O. barthii were tested to assess their morpho-physiology and yield performance under normal environment where all the accessions showed variable morpho-physiological and yield performances. Based on their morpho-physiological parameters the accessions were distributed into five clusters where cluster IV included the maximum number of accessions (17) followed by clusters III (11), cluster II (5), cluster V (4) and cluster I (3). The principal component analysis (PCA) clearly and concisely explains the genetic diversity of wild rice genotypes. Based on the cluster grouping ten accessions from the ten wild species were further evaluated in the 2ndexperiment under normal condition and their morpho-physiological features were identified. The results summarized that the wild rice genotypes exerted fluctuating result for different morpho physiological traits. The maximum grain yield hill-1 (101.90 g) was distinctly produced by wild rice genotype O. nivara and the minimum grain yield hill-1 (9.00 g) was produced by wild rice genotype O. latifolia. In the 3rd pot experiment the performance of these ten wild species of rice along with two checks FR13A (check variety as drought tolerant) and BRRI dhan29 (check variety as drought sensitive) were evaluated under drought condition of 40-45 % field capacity. Among the tested genotypes O. punctata and O. barthii showed more susceptibility under drought stress. On the other hand, O. latifolia, O. nivara, Poterecia coaractata, O. officinalis and FR13A showed more tolerance capability against drought stress. The 4th experiment was comprised of two factors: 12 rice genotypes (10 wild rice genotypes along with two checks Pokkali as salinity tolerant and BRRI Dhan 29 as salinity sensitive) and 3 salinity levels viz. 0 mM NaCl, 50 mM NaCl and 100 mM NaCl. Potericia coaractata and O. latifolia showed the most tolerance among all the wild rice genotypes used. The allelic diversity analysis of the 10 wild species of rice concluds that the polymorphism information content (PIC) value of each primer pair ranged from 0.16 (O. rufipogon) to 0.37 (O. alta, O. latifolia, O. offficinalis, Portericia coactata and O. nivara) with an average of 0.31. The results reveal that O. alta, O. latifolia, O. offficinalis, Portericia coactata and O. nivara would be the best salt tolerant wild rice genotypes among 12 wild rice genotypes used in the study. The identified traits of the wild species of rice for salinity and drought tolerance would be a valuable resource for their introgression into the modern rice cultivars for future breeding programs to develop salinity and drought tolerant rice cultivars. MORPHO-PHYSIOLOGICAL CHARACTERIZATION OF WILD RELATIVES OF RICE CONFERRING TOLERANCE TO SALINITY AND DROUGHT; A Dissertation DOCTOR OF PHILOSOPHY By MD. AZAMUL HAQUE, Reg. No. 1705197, DEPARTMENT OF AGRONOMY, HAJEE MOHAMMAD DANESH SCIENCE AND TECHNOLOGY UNIVERSITY, DINAJPUR-5200; JUNE 2022.

2022-06-01T00:00:00Z SARKAR, MD. NUR-A-ALAM http://103.7.193.12:8080/xmlui/handle/123456789/2149 2026-06-09T08:23:44Z 2022-06-01T00:00:00Z

SCREENING OF AROMATIC RICE CULTIVARS BASED ON PHYSIO-CHEMICAL PROPERTIES IN RELATION TO DROUGHT STRESS SARKAR, MD. NUR-A-ALAM The investigations comprised four experiments which were carried out during 2017 to 2020 to screen the morpho-physiological behavior and assessment of drought tolerance in Bangladeshi local aromatic rice cultivars at Agronomy Research Field-1, Hajee Mohammad Danesh Science and Technology University, Dinajpur, Bangladesh. There were 65 local aromatic rice cultivars were tested in the 1st experiment for screening out the best performance on the basis of yield performance. Among them 11 aromatic rice cultivars were selected for experiment number 2. The 2nd experiment comprised of two factors Factor A: 11 rice cultivars and Factor B: 2 drought stress level viz., T0= no drought stress (Control) and T1= 40-45% field capacity. Drought stress significantly reduced the growth yield and yield contributing features of tested aromatic cultivars. But the extent of reduction is varied with genotypic difference. The results depicted that, at 40-45% field capacity Chinigura (Red) produced maximum grain yield (56.47 g hill-1) followed by Kalijira (54.63 g hill-1) and Kataribhog (53.89 g hill-1). Kataribhog philipine attained maximum relative water content but Chinigura (Red), Kataribhog and Kalijira also significantly performed better. Kalijira represent the most aroma content (8.56). The single factor 3rd experiment consisted with seven aromatic rice cultivars viz., V1= Chinigura (Red), V2= Kataribhog, V3= Kalijira, V4= Kataribhog (Jata), V5= Radhunipagal, V6= Bolder and V7= Kataribhog philipine. The findings revealed that Chinigura (Red), Kataribhog and Kalijira performed better where Radhunipagal and Kataribhog (Jata) showed the intermediate results and finally Kataribhog philipine and Bolder performed poor in the context of phenological and yield traits analysis with some exceptions. Chinigura (Red) produced the more grain hill-1 (65.66 g) and Kataribhog philipine produced the less (39.55 g). The 4th experiment comprised of two factors; Factor A: 7 rice cultivars viz., V1= Chinigura (Red), V2= Kataribhog, V3= Kalijira, V4= Kataribhog (Jata), V5= Radhunipagal, V6= Bolder and V7= Kataribhog philipine and Factor B: 2 irrigation interval viz., T0= Continuous flooding (Control) and T1= irrigation at 5 days interval, T2= irrigation at 10 days interval, T3= irrigation at 15 days interval, T4= irrigation at 20 days interval and T5= irrigation at 25 days interval. Irrigation interval had significant effect on the plant characteristics of aromatic rice. Continuous flooding and irrigation at 5 days interval performed best for most of the observed characters and irrigation at 25 days interval plant did not survive of all tested cultivars. Interaction of Chinigura (Red) and irrigation at 5 days interval produced the maximum grain yield hill-1 (65.15 g) followed by interaction of Chinigura (Red) and continuous flooding (64.53 g). The interactions of Kataribhog and Kalijira with irrigation at 5 days interval, respectively also statistically significant for grain yield. Considering the abiotic stress (especially drought) condition and limited resources of irrigation water, Chinigura (Red) along with 5 days intermittent irrigation could be best water saving production package under moisture stress prone area of Bangladesh. SCREENING OF AROMATIC RICE CULTIVARS BASED ON PHYSIO-CHEMICAL PROPERTIES IN RELATION TO DROUGHT STRESS; A Dissertation DOCTOR OF PHILOSOPHY By MD. NUR-A-ALAM SARKAR, Reg. No. 1705198, DEPARTMENT OF AGRONOMY, HAJEE MOHAMMAD DANESH SCIENCE AND TECHNOLOGY UNIVERSITY DINAJPUR-5200; JUNE 2022.

2022-06-01T00:00:00Z http://103.7.193.12:8080/xmlui/handle/123456789/1911 2025-10-26T06:51:58Z 2011-01-01T00:00:00Z

Development of cell-based assay to investigate relationships between cell cycle and programmed cell death

2011-01-01T00:00:00Z