Browsing by Author "ALAM, MD. MAHABUB"

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BIO-CONTROL AGENTSANDBOTANICAL PRODUCTS FOR THE ECO-FRIENDLY MANAGEMENT OF STEM BORER ON HYBRID RICE
(Department of Entomology, Sher-e-Bangla Agricultural University, Dhaka-1207, 2009-12) ALAM, MD. MAHABUB
The experiment was conducted at the experimental field of Sher-e-Bangla Agricultural University, Dhaka, Bangladesh during the period from June to November, 2009 to find out the most effective management practice(s) among Trichogramma evanescens egg parasitoid @ 0.25 gm and 0.50 gm plot-1, Bacillus thuriengiensis bacterium suspension @ 0.1% and 0.2%, SafeClean @ 0.05%, SafeMax @ 0.05%, Neem oil @ 0.3% and chemical insecticide Furadan 5G @ 6 gm plot-1 for the eco-friendly management of rice stem borer on hybrid rice (Hira-2). The experiment was laid out in Randomized Complete Block Design (RCBD) with three replications. Considering the dead heart and white head infestation, among the treatments chemical insecticide Furadan 5G (T8) performed as the most effective practice in reducing the dead heart (81.47%) and white head (91.44%) infestation over control followed by Trichogramma egg parasitoid @ 0.50% (T2) treatment (73.64% and 82.34%, respectively). T8also gave the maximum yield contribution characters of the rice plants as well as produced the highest grain yield (7.67 ton ha-1) followed by T2 (7.23 ton ha-1). Economically the most effective treatment was T2, through which the highest benefit cost ratio (5.04) was achieved as compared with other treatments including Furadan 5G (3.80). Considering the ecological point of view, the T2 comprising Trichogramma evanescens egg parasitoid @ 0.50 gm plot-1 was the most ecologically sound management practice applied against rice stem borer.
PERFORMANCE OF INBRED AND HYBRID RICE VARIETIES TO DIFFERENT LEVELS OF PHOSPHORUS
(DEPARTMENT OF AGRONOMY, 2008) ALAM, MD. MAHABUB
The experiment was carried out at the Agronomy Field of the Sher-e-Bangla Agricultural University, Dhaka during the period from December, 2006 to June, 2007 study the relative peribunance of inbred and hybrid rice varieties at difThrent levels of phosphorus. Three varieties of inbred and hybrid rice (BRRI dhan 29, Moron and Hira-2) and five levels of phosphoms(O. 24. 48. 72 and 96 Kg PnOs h15 were the treatment variables. The experiment was laid out fellowing spilt plot design with three replications having varieties in the main plot and phosphorus rate in the sub-plot. Plant height, number of tillers bill 4 , fresh weight of plant, thy matter partitioning, total grains panicl& ' -grain weight, . spikelt sterility, 1000 grain yield, straw yield and harvest index varied significantly due to the variations of .fihled grains panicle, unfilled grains panicle 4 variety. Hybrid variety Hira-2 produced the maximum number of filled grains panicleT' (106.00) and minimum in BRRI dhan 29. Variety Hira-2 (7.50 t ha d ) and Aloron (7.41 ha') produced the highest grain yields which were significantly different from BRRI dhan 29 (6.86 t ha'). The yield increase due to variety Hira-2 and Moron was 0.64 and 0.55 t hi'. which was 9.32% and 8.0 l% respectively over BRRI dhan 29. All the studied parameters of rice varieties except harvest index also differed significantly with the application of phosphorus fertilizer. An application of 72 kg P205 hn' showed to produced better yield attributes. Phosphorus level at 72 kg hi' (P3) produced the highest grain yield (7.23 t haT') of rice. Plants grown without added phosphorus gore the lowest grain yield (4.99 rhi'). A significant interaction between varieties and phosphorus levels in respect of yield and yield attributes of rice was observed. Plants grown at any varieties without P fertilizer produced lowest grain yield. Highest grain yield (7.68 t hi') was recorded variety Hira-2 with 72 kg P 2 05 hi'. Number of efThctive tillers hilt', panicle length, number of filled grains hill" and 1000-grain weight had a significant correlation with grain yield t ha".
SCREENING OF SUITABLE VARIETY AND DATE OF SOWING ON THE PERFORMANCE OBSERVATION OF BORO RICE UNDER AEROBIC CONDITION IN DINAJPUR REGION
(HAJEE MOHAMMOD DANESH SCIENCE AND TECHNOLOGY UNIVERSITY, DINAJPUR, 2015-12) ALAM, MD. MAHABUB; Professor Dr. Md. Alamgir Hasan
Aerobic system of rice production is an eco-friendly and environmentally safe technology that helps to save 50-60% irrigation water in boro rice production. A field experiment was carried out at the Agronomy Research Field of Hajee Mohammad Danesh Science and Technology University, Dinajpur during boro season, 2014 to find out suitable rice varieties along with optimum sowing date for aerobic rice cultivation. The experiment was conducted with five varieties namely, BR16 (Shahibalam), BRRI dhan28, BRRI dhan29, BRRI dhan47 and BRRI dhan55 and three dates of sowing namely, January 01, January 11 and January 21, 2014, respectively. The experiment was laid out in randomized complete block design with three replications. Results showed that except only few parameters, the yield and yield contributing characters were significantly influenced by variety and date of sowing. Among five varieties, BRRI dhan29 was found significantly superior to all other varieties with respect to plant height, number of total tillers hill-1 , number of effective tillers hill-1 , number of total grains panicle-1 , number of filled grains panicle-1 , 1000 grain weight, grain yield, straw yield and biological yield. The highest grain yield (6.07 t ha-1 ) was obtained from BRRI dhan29 and lower grain yield (5.30 t ha-1 ) was found in BRRI dhan28. On the other hand, Yield decreased with delay in sowing date. Among three date of sowing, significantly highest grain yield (6.72 t ha-1 ) was obtained from sowing in January 01 and the lowest grain yield (4.35 t ha-1 ) was obtained from sowing in January 21. The effect of interaction between variety and date of sowing on grain yield, straw yield and biological yield were significant. In terms of economic return, the highest gross return, net return and benefit-cost ratio (2.63) were obtained from BRRI dhan29 and significantly the highest gross return, net return and benefit-cost ratio (2.82) were also obtained from the sowing in January 01. The interaction effect between variety and date of sowing on gross return, net return and benefit-cost ratio was significant. In Bangladesh, about 28% of the total cost for production of boro rice goes for irrigation and the scarcity of irrigation water from both underground and surface sources are increasing which in making the boro rice production at stake. Under this looming water crisis situation boro rice production could be sustained by using the technology that requires very less water like aerobic method. Therefore, the variety BRRI dhan29 planted at January 01 is the best suited to get higher yield and higher economic return under aerobic method of cultivation.