Browsing by Author "Ayesha, Sultana Kaniz"

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Effect of Crop Establishment and Weed Control Method on Productivity of Transplanted aman Rice
(Weed & Turfgrass Science, 2018) Ali, Mohammad; Bir, Md. Shahidul Haque; Rahman, Md. Habibur; Ayesha, Sultana Kaniz; Hoque, Aminul; Harun-Ar-Rashid, Md.; Islam, Md. Rashidul; Park, Kee Woong
This experiment was conducted to find the most suitable crop establishment method and weed management practices for transplanted aman rice in Bangladesh. Rice variety Bangladesh Rice Research Institute (BRRI) dhan44 was used as planting materials where three crop establishment methods (T1: direct wet seeding by drum seeder; T2: hand broadcasting; T3: transplanting) and four weeding options (W1: Hand weeding (HW); W2: BRRI weeder+HW; W3: Herbicide+HW; and W4: no weeding) were tested. Among the crop establishment methods, the highest grain yield (5.12 t ha-1) was obtained with the T3, while the highest benefit cost ratio (BCR) of 2.08 was found in T2. In case of the weed management method, W1 showed superior results on the plant density/m2 (139.66) at 60 days after transplanting (DAT), grain yield (4.97 t ha-1), and BCR (2.03). On the other hand, the highest plant dry matter (36.20 g) at 60 DAT and the highest yield (6.10 t ha-1) were obtained in a T3W1 combination. The results of this study show that the productivity of rice during aman season could be most significantly increased with the use of transplanting (T3) alone, hand weeding (W1) alone, or a combination of the two methods (T3W1).
Effect of crop establishment method and N management practice on productivity of transplanted aman rice
(Bioscience Research, 2018) Bir, Md. Shahidul Haque; Ali, Mohammad; Rahman, Md. Habibur; Ayesha, Sultana Kaniz; Hoque, Aminul; Rashid, Md. Harun-Ar; Islam, Md. Rashidul; Cho, Jin-Woong; Park, Kee Woong
An experiment was conducted at the Bangladesh Rice Research Institute Regional Station, Rajshahi, Bangladesh to find the most suitable crop establishment method and best application of N management practice for transplanted aman rice. The monsoon-season rainfed rice is aman, which is planted in two ways: direct seeding in March or April and transplantation between July and August. Both types are harvested from November through December. T. aman rice variety, BRRI dhan44 was used as planting material where three crop establishment methods (T1: direct wet seeding by drum seeder, T2: hand broadcasting and T3: transplanting) and four N management practices (N1: ⅓ at 15 DAT+ ⅓ at 30 DAT +⅓ at panicle initiation (PI), N2: ¼ at basal + ¼ at 15 DAT + ¼ at 30 DAT + ¼ at PI, N3: leaf color chart (LCC) based N application, N4: no nitrogen) were tested. Among crop establishment methods, the transplanting method (T3) produced the highest plant density m-2 (143.16) and yield (5.05 t ha–1 ). Among N management practices, N2 gave the greatest yield (4.97 t ha–1 ) and the highest benefit cost ratio (1.97). Treatment combination of T3N2 at 60 DAT produced the highest plant density m-2 (152.33). Therefore, from the current study, it can be concluded that the transplanting method (T3) and N split fertilization of ¼ at basal + ¼ at 15 DAT + ¼ at 30 DAT + ¼ at PI (N2), singly or together, would be the most productive application treatments during aman season.
Effect of Crop Establishment Methods, Nitrogen and Weed Management Practices on The Performance of Rice Variety
(University of Rajshahi, 2016) Ayesha, Sultana Kaniz; Hoque, Aminul
Four experiments were conducted at BRRI Regional Station, Shyampur, Rajshahi to find out the most selective crop establishment method, best application option of N and suitable weed management practices in both T aman and Boro season. Popular T aman rice variety BRRI dhan44 and Boro rice variety BRR! dhan45 were used as planting materials, where three crop establishment methods (T1= direct wet seeding by drum seeder, T2= hand broadcasting and T3= transplanting) were common treatments for the whole study of N management (N 1= ½ at 15 DAT+ ½ at 30 DAT+½ at PI, N2= ¼ at basal + ¼ at 15 DAT + ¼ at 30 DAT + ¼ at PI, N3= LCC based N application and N4= no nitrogen) for the experiment one and three and weeding options (W 1=Hand weeding, W2=BRRI weeder + HW, W3=Herbicide + HW and W4= no weeding) for the experiment two and for four. The experiment was laid out in RCBD with three replications and means were adjudged by DMRT at 5% level of probability. Data were collected on morphophysiological, yield and yield attributes where the most of the studied characters were statistically significant due for single effect or their interactions. In experiment one, effect of crop establishment method, the plant population had maximum (143 .16) in transplanting methods (T3) at 60 DAS and highest grain yield (5.05 t ha-1) at than other two crop establishment methods while T2 (hand broadcasting) obtained the highest BCR (2.34). Among the N management practices, N2 showed significantly the greater result on plant population (134.11) at 60 DAS and grain yield (4.97 t ha-1) the highest BCR (1.97). For interaction effect between crop establishment and N application methods, plant population had maximum (152.33) in interaction treatment of T3N2 at harvest. In experiment two, highest yield (5.12 t ha-1) was obtained in T3 with highest BCR (2.08) was found in hand broadcasting (T2). For weed management, superior results found for plant population (139.66) at 60 DAS, grain yield (4.97 t/ha) and BCR (1.47) in hand weeding treatment. On the other hand, the highest PDM (36.20 g) at 60 DAS and yield (6.10 t ha-1) were obtained in T3W1• Similarly, in experiment three plant population and PDM had maximum (57.29 and 4.43 g) in T3 at 60 DAS while T1 showed the highest BCR (1.47). Incase of N management, N2 showed the maximum PDM (4.93 g) at 60 DAS and the highest BCR (1.97). The maximum number of plant population (67. 16) at 60 DAS was taken in interaction of T3N2. For last experiment, transplanting method (T3) showed significantly the maximum population of plant (61.87) at 60 DAS and highest yield (3.54 t ha-1) however, T2 showed the highest BCR (1.35). Similarly, maximum plant population (66.44) at 60 DAS, highest straw oven dry weight (31.54 g) at harvest and the highest BCR (1.91) were obtained for hand weeding treatments (W1). So, the above observation of the whole study, it could be concluded that the transplanting method and N @ ¼ at basal + ¼ at 15 DAT+ ¼ at 30 DAT+ ¼ at PI singly (T3 and N2) or their interaction effect (T3N2) would be the most suitable for aman and boro. Considering weed management practices, the interaction of T3 W1 would be the best option for T-aman (Exp.2) where the interaction effect of TI W 1 ( direct wet seeding by drum seeder x hand weeding) were the most efficient interaction for obtaining the higher yield during Boro season.