http://localhost:8080/handle/123456789/2712 2026-04-18T21:07:14Z http://localhost:8080/handle/123456789/2463 RESPONSE OF GRASSPEA (Lathyrus sativus L.) VARIETIES TO DIFFERENT NITROGEN MANAGEMENTS KABIR, NUSRAT An experiment was conducted at the research field of Department of Agronomy, Sher-e-Bangla Agricultural University, Dhaka during the period from November to March 2011 to study the response of grasspea varieties to different nitrogen managements using RCBD (Randomized Complete Block Design) with three replications. During the experiment, three varieties of grasspea (V = BARI khesari-1, V 2 =BARI khesari-2 and V = Local khesari) and six nitrogen management treatments (N 0 = Control, N 3 1 1 = Basal application with 20 kg N ha , N 2 = Basal application with 40 kg N ha and 20 kg N ha and 20 kg N ha -1 -1 at branch initiation stage, N -1 , N at flower initiation stage and N 3 =Basal application with 20 kg N ha 4 =Basal application with 20 kg N ha =Basal application with 20 kg N ha -1 and 20 kg N ha -1 5 at pod initiation stage) were used as treatments. In most of the growth stages the tallest plants, highest number of branches plant , plant dry weight, nodule number plant -1 , nodule dry weight and pod number plant , seed number pod -1 , maximum 1000-seed weight, grain yield, stover yield and harvest index was found from BARI khesari-2, which was followed by BARI khesari-1.In case of nitrogen management, distinct variations were observed between initial and later stages. Though N 2 (basal application with 40 kg N ha ) gave higher results for growth parameters initially, it was found that N (basal application with 20 kg N ha -1 and 20 kg N ha -1 3 at branch initiation) was better at later stages than the previously mentioned treatment. Yield parameters like pod number plant , seed number pod -1 , maximum1000-seed weight, grain yield, stover yield and harvest index were also highest in N 3 followed by N .On the other hand, for different nitrogen management techniques, the lowest results were recorded from N 0 2 . For combination effect of variety and nitrogen management it was observed that initial growth was better in V 1 N (BARI khesari-1 + Basal application with 40 kg N ha -1 ) and V 2 N 2 2 (BARI khesari-2 + Basal application with 40 kg N ha ) while later growth and yield parameters were better in V 2 N (BARI khesari-2 + Basal application with 20 kg N ha -1 and 20 kg N ha -1 3 at branch initiation stage) closely followed byV 1 N 3 (BARI khesari-1 + Basal application with 20 kg N ha and 20 kg N ha -1 at branch initiation stage). -1 -1 -1 -1 -1 -1 -1 -1 -1 A Thesis Submitted to the Department of Agronomy Sher-e-Bangla Agricultural University, Dhaka in partial fulfilment of the requirements for the degree of MASTER OF SCIENCE (M.S.) IN AGRONOMY SEMESTER: JULY - DECEMBER, 2012 2012-12-01T00:00:00Z http://localhost:8080/handle/123456789/2462 PERFORMANCE OF COTTON HYBRID AND INBRED VARIETIES UNDER DIFFERENT NUTRIENT LEVELS ISLAM, MD. MOMINUL A field study was conducted at Cotton Research Training and Seed Multiplication Farm, Sreepur, Gazipur from July 2011 to February, 2012 to investigate the influence of different levels of fertilizer on a number of hybrid and inbred varieties of cotton in respect of growth, yield components and yield, and fibre quality attributes. The experiment comprised three cotton genotypes (i) HSC-4 (hybrid), (ii) DM-2 (hybrid) and (iii) CB-12 (inbred) variety and five levels of fertilizers (i) Control (without fertilizer), (ii) 25% less than recommended dose, (iii) Recommended dose (RDF: 120, 52, 131,27:N,P,K,S kgha -1 ), (iv) 25% higher than recommended dose and (v) 50% higher than recommended dose. The experiment was laid out in a Randomized Complete Block Design (factorial) with three replications. The results revealed that seed cotton yield, bolls plant -1 , ginning out turn differed among the varieties. The highest seed cotton yield and ginning out turn were obtained in hybrid HSC-4 and that of the lowest received from CB-12 variety. Increasing levels of fertilizer maintained higher values of all the parameters except days to first flowering, lint index and ginning out turn. The tallest plant (111cm) and maximum days to boll opening (129.3), number of no. of bolls plant (27.08), seed cotton yield (2174 kg ha - ii - -1 ), lint yield (953kgha -1 ), seed index (9.49), staple length (1.2inch), micronaire value (4.3), fibre strength (83.70 psi), uniformity ratio (48%) were observed in the plot where 50% higher than RDF was applied. Plant height, bolls plant -1 , individual boll weight, lint yield and ginning out turn showed higher value with the interaction of HSC-4 x 50% higher than RDF. The highest seed cotton yield (2406 kg ha -1 ) Gross return (144360 tk ha -1 ) Gross margin (75358tk ha ), BCR (2.09) and seed index were obtained with the combination effect of CB-12 x 50% higher fertilizer than RDF. For economic point of view, the results indicate that CB-12 inbred variety x 50% higher fertilizer than RDF was more profitable than any of the other treatment combinations. A Thesis Submitted to the Faculty of Agriculture Sher-e-Bangla Agriculture University,Dhaka in partial fulfilment of the requirements for the degree of MASTER OF SCIENCE (MS) IN AGRONOMY SEMISTER: JANUARY-JUNE,2012 2012-12-01T00:00:00Z http://localhost:8080/handle/123456789/2461 INFLUENCE OF WEED CONTROL METHODS ON THE GROWTH AND YIELD OF AROMATIC AMAN RICE VARIETIES CHOWDHURY, IMTIAZ FARUK A field experiment was conducted in medium fertile soil at Sher-e-Bangla Agricultural University (90º33´ E longitude and 23º77´ N latitude), Dhaka, Bangladesh during July to December, 2011 in aman season with a view to find out the performance of transplant aromatic rice varieties under different weed control methods. The experiment was carried out with four varieties i.e. BRRI dhan34, BRRI dhan37, BRRI dhan50 and Chinigura in the main plot and five weed management methods viz. control (no weeding), one hand weeding at 15 DAT, two hand weeding 15 DAT + 40 DAT, Topstar 400SC (Oxadiargyl 400 g L -1 ) @ 100 g ha -1 as post-emergence and Sunrice 150WG (Ethoxysulfuron 150 g kg -1 ) @ 185 ml ha -1 as pre-emergence herbicide in the sub plot in split plot design. Twenty three different weed species infested the field among which Echinochloa crussgalli (51.79%) at 15 DAT, Cyperus michelianus (56.14%) at 30 DAT, Cyperus esculentus (24.93%) and Cyperus difformis (24.54%) at 45 DAT, Cyperus esculentus (33.6%) at 60 DAT and Ludwigia octovalvis (21.88%) at 75 DAT were dominant. BRRI dhan34 gave highest (3.16 t ha ) and BRRI dhan50 produced lowest grain yield (1.88 t ha -1 ). The result showed that pre-emergence herbicide Sunrice 150WG controlled weeds very significantly which showed highest growth and yield contributing characters of rice. Application of Sunrice 150WG showed highest weed control efficiency at 30 DAT 95.28% and 78.95% at 60 DAT. The grain yield produced by Sunrice 150WG was 50.73%, 32.07%, 11.95% and 5.25% higher than the yield obtained from control, one hand weeding, two hand weeding and Topstar 400SC treated plots, respectively. Considering weed control cost, Sunrice 150WG was found more economic for controlling weeds in transplant aromatic aman rice and benefit cost ratio was 2.26 whereas, 1.17, 1.30, 1.46 and 2.14 were found from control, one hand weeding at 15 DAT, two hand weeding at 15 DAT + 40 DAT and Topstar 400SC, respectively. The interaction showed that BRRI dhan34 in combination with Sunrice 150WG produced the highest grain yield (4.10 t ha ) while lowest grain yield (1.44 t ha -1 ) was obtained from BRRI dhan50 in control treatment. -1 -1 A Thesis Submitted to the Department of Agronomy, Sher-e-Bangla Agricultural University, Dhaka, in partial fulfilment of the requirements for the degree of MASTER OF SCIENCE IN AGRONOMY SEMESTER: JULY-DECEMBER, 2012 2012-12-01T00:00:00Z http://localhost:8080/handle/123456789/2460 INFLUENCE OF IRRIGATION, FERTILIZER DOSE AND PLANT DENSITY ON THE YIELD OF SOYBEAN RAHMAN, FERDAUSI An experiment was conducted at the Agronomy field Laboratory of Sher- e– Bangla Agricultural University, Dhaka-1207 during the period from December, 2011 to April 2012 to study the influence of different levels of irrigation, fertilizer dose and plant density on the growth and yield of soybean. The experiment comprised two doses of fertilizer viz. twenty percent lower of the recommended dose, and the recommended dose (Urea, TSP and MP @ 60, 175 and 120 kg ha , respectively) and two levels of irrigation viz. irrigated and no irrigated and three types of plant density viz recommended (44 plants/m 2 ), twenty percent lower and plus twenty percent greater of the recommended density. The experiment was laid out in split plot design with three replications. The results showed that there was significantly higher soil moisture in the irrigated-fertilized (47.53%), irrigated with recommended density plots (49.96%) and irrigated-fertilized plots having higher density plots (52.8%) in comparison to the that in the non irrigated plots (33.85%). Significantly the highest exudation rate was obtained in the irrigatedfertilized with the highest populated plots (0.077 g/hr) in comparison to the lowest of non irrigated-fertilized recommended density plots (0.02 g/hr). Irrigatedfertilized plots having lower to recommended density showed highest plant height (37 cm), leaf area (147 cm 2 /plant), dry weight (6-8 g/plant) and no. of pods/plant (8-10). Significantly the highest seed yield of 1.00-1.04 t/ha were obtained in irrigated-fertilized plots having recommended or higher density. -1 A Thesis Submitted to the Faculty of Agriculture, Sher-e-Bangla Agricultural University, Dhaka, in partial fulfilment of the requirements for the degree of MASTER OF SCIENCE IN AGRONOMY SEMESTER: JANUARY- JUNE, 2012 2012-12-01T00:00:00Z