http://localhost:8080/handle/123456789/2643 2026-04-18T13:25:35Z http://localhost:8080/handle/123456789/3293 NITROGEN, WEED AND IRRIGATION MANAGEMENT FOR MAXIMIZING GROWTH AND YIELD OF BORO RICE (cv. BRRI dhan29) ISLAM, MD. SHAFIQUL Two consecutive field experiments were conducted at the Suapur Union of Dhamrai Upazila, Dhaka. The experimental field is located at 23 88´N latitude and 90 0 14´E longitude and AEZ-12, during the period of 2014-2015 and 20152016 to find out nitrogen, weed and irrigation management for maximizing growth and yield of boro rice (cv.BRRI dhan29). The experiment comprised three factors; Factor A: Nitrogen management (4 levels), N : No urea (control), N 1 : Urea super granules-USG (77 kg N ha -1 ), N 2 0 : Prilled urea at recommended dose (150 kg N ha -1 ) and N 3 : ½ of the recommended dose (75 kg N ha ); Factor B: Weed management (4 levels), W 0 : No weeding (control), W : Two hand weeding (20 and 40 DAT), W 2 0 1 : Pre emergence herbicide (Butachor) and W : Post emergence herbicide (Prityloclor); Factor C: Irrigation management (4 levels), I 1 : Irrigating all time, I 2 : Irrigating 3 days after drying, I : Irrigating 5 days after drying, I : Alternate wetting and drying (AWD) method. The experiments were laid out in split-split-plot designs with three replications. Data on different growth characters, yield components and yield of BRRI dhan29 were recorded. Statistically significant variation was observed for different nitrogen, weed and irrigation management and also for their combined effect. For nitrogen management, on an average of two consecutive years, the highest grain yield (6.01 t ha 4 -1 ) was recorded from N 1 3 , while the lowest (4.35 t ha ) from N 0 . In weed management, the highest grain yield (5.92 t ha -1 ) was recorded from W 2 , while the lowest (4.49 t ha -1 ) from W . In case of irrigation management, the highest grain yield (5.88 t ha -1 0 ) was found from I 4 -1 , while the lowest (4.70 t ha ) from I 1 . For the combined effect of different nitrogen and weed management, the -1 3 -1 highest grain yield (6.80 t ha -1 ) was recorded from N iii 1 W , whereas the lowest (3.85 t ha -1 ) from N 0 W 0 2 . Due to the combined effect of different nitrogen and irrigation management, the highest grain yield (6.36 t ha -1 ) was recorded from N 1 I 4 , whereas the lowest (3.80 t ha -1 ) from N 0 I . In case of combined effect of different weed and irrigation management based on pooled data, the highest grain yield (6.52 t ha -1 ) was recorded from W 2 I 4 1 , whereas the lowest (3.85 t ha ) from W 0 I . Due to the combined effect of different nitrogen, weed and irrigation management, on polled basis the highest grain yield (6.99 t ha 1 -1 ) was recorded from N 1 W 2 I 4 , while the lowest yield (3.18 t ha -1 ) from N 0 W 0 I . The treatments having significantly high grain yields over others were N 1 1 W 1 I ), N 1 W 2 I 4 (6.99 t ha -1 ), N 1 W 3 I 4 (6.90 t ha -1 ), N 2 W 2 I 4 (6.70 t ha -1 ),N 2 4 (6.61 t ha W ), N 3 W 2 I 4 (6.54 t ha -1 ) and N 3 W 3 I 4 (6.61 t ha -1 ), which were identical among themselves. A Thesis submitted to the Faculty of Agriculture Sher-e-Bangla Agricultural University, Dhaka in partial fulfilment of the requirements for the degree of DOCTOR OF PHILOSOPHY IN AGRONOMY 2017-01-01T00:00:00Z http://localhost:8080/handle/123456789/2608 INFLUENCE OF INTEGRATED NUTRIENT MANAGEMENT AND PLANTING CONFIGURATION ON THE PRODUCTIVITY OF SESAME (Sesamum indicum L.) MALEK, MOHAMMAD The study was carried out to evaluate some sesame varieties under different nutrient management strategies for enhancing the productivity of sesame during 2014-16. The experiments were conducted in three years. First year experiment was carried out with two factors viz., different nutrient levels with different varieties of sesame in split plot design with three replications during March-June 2014. The main plot treatments had four nutrient levels viz., 75% of recommended dose of fertilizer(RDF) (N1), 100% RDF (N2), 125% of RDF (N3) and 150% of RDF (N4) and the subplot treatments included six sesame varieties viz., Lal til (Local) (V1), Atshira (Local) (V2), T6 (V3), BARI til-3 (V4), BARI til-4 (V5) and Bina til 2 (V6). RDF indicates a nutrient schedule of 56:72:23 kg N, P2O5 and K2O ha-1. Results revealed that nutrient levels, 150% of RDF produced the highest growth parameters, but 100% of RDF (N2) produced the highest seed yield (1223 kg ha-1). The least seed yield was observed with N4 (924 kg ha-1). Among the sesame varieties placed in different sub plots, BARI til-4 showed the best growth and yield contributing parameters giving the highest seed yield (1170 kg ha-1). The least seed yield was registered with V1 (811.30 kg ha-1). Interaction effect was found significant showing a seed yield of 1481 kg ha-1 with N2V5. From this trial, the best nutrient level (100% of RDF i.e., 56:72:23 kg N, P2O5 and K2O ha-1) and variety BARI til-4 selected and taken over to the next year of study. In the second year experiment, different sources of organic manures were integrated with chemical fertilizers at three different proportions viz., 25, 50 and 75 percent along with 100 percent organic source and chemical fertilizers alone. The organic sources included vermicompost and FYM. Different plant spacing were associated with different sources of plant nutrients. Nine nutrient sources and four plant spacings were used in this experiment. The experiment was conducted during March-June 2015 in split plot design with three replications consisting of 36 treatment combination. With regard to different sources of nutrients, T5 (25% RDF through vermicompost + 75% as chemical fertilizer) produced the highest seed yield (1326 kg ha-1), oil yield (581.07 kg ha-1) and protein yield (256.09 kg ha-1) where least seed yield (1204 kg ha-1), oil yield (518.57 kg ha-1) and protein yield (226.55 kg ha-1) was produced by T6 (100% RDF through FYM). Among the different plant spacing studied, S3 (30 cm × 15 cm) produced highest yield attributes but highest seed yield (1413 kg ha-1), oil yield (584.11 kg ha-1) and protein yield (250.82 kg ha-1) was obtained from S1 (30 cm × 5 cm) where the least seed yield (1102 kg ha -1 ), oil yield (484.19 kg ha -1 ) and protein yield (216.09 kg ha -1 ) was obtained from S (30 cm × 20 cm). Interaction effect of nutrient sources and plant spacing in second year experiment, the highest seed yield, oil yield and protein yield (1437, 608.14 and 269.58 kg ha -1 4 , respectively) were produced with T 5 S where lowest seed yield (933.30 kg ha -1 ), oil yield (412.05 kg ha -1 ) and protein yield (186.29 kg ha 1 -1 ) were obtained from T . The third year experiment was the repeated experiment of second year and similar trend was found in maximum cases. The highest seed yield, oil yield and protein yield (1442, 609.39 and 271.38 kg ha 1 , respectively) were obtained from the treatment combination of T 5 S where the lowest (962, 424.43 and 186.29 kg ha -1 1 , respectively) were also obtained from the treatment combination of T 6 S 4 . 6 S 4 - A Thesis Submitted to the Faculty of Agriculture Sher-e-Bangla Agricultural University, Dhaka, in partial fulfilment of the requirements for the degree of DOCTOR OF PHILOSOPHY IN AGRONOMY DEPARTMENT OF AGRONOMY SHER-E-BANGLA AGRICULTURAL UNIVERSITY SHER-E-BANGLA NAGAR, DHAKA -1207, BANGLADESH 2017-06-01T00:00:00Z http://localhost:8080/handle/123456789/2607 INFLUENCE OF GREEN MANURING ON SOIL QUALITY IMPROVEMENT, FERTILIZER ECONOMY AND MONETARY ADVANTAGES OF GM-T. AMAN-MUSTARD CROPPING PATTERN IRIN, ISRAT JAHAN Six field experiments and one laboratory experiment were conducted at Sher-e-Bangla Agricultural University during uninterrupted years of 2015-2016 to 2016-2017. The main objective of the experiments was to evaluate the impact of different kind of green manures on soil nutrient balance through adding biomass and N-accumulation along with its subsequent impact on crops yield and monetary advantages under Green manure-T. Aman rice-Mustard cropping patern.The green manure crops viz. Deshi dhaincha (Sesbania aculeata), African dhaincha (Sesbania rostrata), sunnhemp (Crotolaria juncea L.), Mungbean (Vigna radiata), Blackgram (Vigna mungo), Cowpea (Vigna unguiculata), Ipil-ipil (Leucaena leucocephala) and Mimosa (Mimosa pudica) were grown during two consecutive years for establishing a new cropping pattern of GM-Rice-Mustard. Fifty days-old green manure crops were incorporated after in situ cultivation and then both T. aman (subsequent crop) and mustard crops (following crop) were grown with recommended dose of N and half of recommended dose of N ha-1 in 1st year (2015) for T. aman rice and recommended dose and half recommended doses of NPK fertilizers in 2nd year (2016) for T. aman rice as well. Results showed that, the biomass incorporation reduced the N applicationin rice. The biomass from Sesbania rostrata , Sesbania aculeata and Crotalaria juncea with decreasing levels (half of recommended dose of NPK fertilizer) of fertilizer in T. aman rice gave the yield which was at par to increased level (recommended dose) of fertilizer application. Incorporation of Sesbania rostrata and Sesbania aculeata added more organic matter and nitrogen to the soil prior to T. aman rice planting. However, the higher grain yield of subsequent T. aman rice (BRRI dhan66) was recorded at both from recommended and half of recommended dose of Nha-1and NPK with S. rostrata and S. aculeata followed by C. juncea and V. unguiculata incorporation as compared to control (no green manures). Green manuring (S. rostrata and C. juncea) residues incorporation prior to rice transplanting substantially increased (1549 kgha-1 and 1309 kgha-1for 2015 and 2016 respectively) the yield of the succeeding crop mustard as well. In case of mustard, S. rostrata incorporated plots gave the highest seed yield followed by C. juncea and V. unguiculata. The nutrient balance of soil after incorporation of different green manure crops specially S. rostrata, S. aculeata and C. juncea showed positive balance of nutrients than other green manures. Inclusion of S. rostrata as a GM crop in the GM-Rice- Mustard cropping sequence showed higher rice equivalent yield (REY) and production efficiency. This cropping sequence gave on an average 67% higher rice equivalent yield (REY) compared to the existing Fallow-Rice-Mustard sequence. A THESIS Submitted to the Faculty of Agriculture, Sher-e-Bangla Agricultural University, Dhaka, in partial fulfilment of the requirements for the degree of DOCTOR OF PHILOSOPHY IN AGRONOMY SEMESTER: JANUARY-JUNE,2017 DEPARTMENT OF AGRONOMY SHER-E-BANGLA AGRICULTURAL UNIVERSITY, DHAKA-1207 2017-06-01T00:00:00Z