Browsing by Author "PARK, KEE WOONG"

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Combined effect of herbicides on the weed management of rice
(1Department of Agronomy Bangladesh Agricultural University, 2015) AFRIN, NAHID; BHUIYA, MD. SULTAN UDDIN; UDDIN, MD. ROMIJ; BIR, MD. SHAHIDUL HAQUE; PARK, KEE WOONG
An experiment was conducted at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh between December 2013 to May 2014. The purpose of the experiment was to investigate the combined effect of herbicides on the weed management of rice. The experiment consisted of two varieties, BR 14 (Gazi) and BRRI dhan 28 along with nine different weed management treatments such as weedy check, the recommended dose of Manage 10 WP, recommended dose of Polifit 500 EC, 70% of Manage+20% of Polifit, 20% of Manage+70% of Polifit, 60% of Manage+20% of Polifit, 20% of Manage+60% of Polifit, 50% of Manage+20% of Polifit and 20% of Manage+50% of Polifit. Twelve weed species belonging to five families infested the experimental plots. In the BR14 Variety at 20, 40 and 60 days after transplanting (DAT), lower weed population/ m2 and weed dry weight (g/m2), but higher weed control efficiencies of 65.52, 60.35 and 66.98% were realized, respectively. The recommended dose of Polifit 500 EC treatment resulted in the lowest weed population and weed dry weight as well as the highest weed control efficiency of 83.45, 84.93 and 87.07% at 20, 40 and 60 DAT, respectively. Therefore, to control weeds in an effective manner and in order to get the optimum grain yield in boro rice, an application of Polifit 500 EC should be applied.
Effect of different transplanting dates on the yield and yield components of Binadhan-14 (Oryza sativa L.) under climatic conditions in Bangladesh
(Bangladesh Institute of Nuclear Agriculture (BINA), 2016) ISLAM, MD. MONJURUL; ISLAM, MD. SHAHIDUL; RAHMAN, MD. HABIBUR; SAHA, MAMATA; BIR, MD. SHAHIDUL HAQUE; SOHEL, MD. MEHEDI HASAN; LEE, JEUNG JOO; PARK, KEE WOONG
Binadhan-14 (Oryza sativa L.) is a late transplanting rice variety with high yield potential, developed for boro season by BINA in 2013. Effects of different transplanting dates to yield of Binadhan-14 were assessed at three locations in Bangladesh during boro season in 2014-15. BRRI dhan 28 was used as a check variety. At each location, one month old seedlings were transplanted at five different dates with 15-day intervals between February 1 and April 1, 2015. A randomized complete block design with three replications was used to lay out plots in the experiment. Transplanting dates significantly influenced grain yield and yield contributing parameters, such as plant height, panicles per hill, panicle length and filled grains per panicle, except for 1000-grain weight. The highest grain yields were obtained when the rice was transplanted on February 1 and 15, 2015. The highest yield of Binadhan-14 was obtained at Rangpur (6.75 t/ha), followed by Mymensingh (6.25 t/ha) and Magura (5.90 t/ha). Results of this study suggest that February 1 to 15 would be the best time to transplant Binadhan-14 as a late transplanting boro variety under the climatic conditions in Bangladesh.
Effect of different transplanting methods on yield of Binadhan-14 (Oryza sativa L.) at late boro season under climate change
(Bangladesh Institute of Nuclear Agriculture (BINA), 2016) ISLAM, MD. MONJURUL; RAHMAN, MD. HABIBUR; ISLAM, MD. SHAHIDUL; SAHA, MAMATA; KAMRUZZAMAN, MD.; BIR, MD. SHAHIDUL HAQUE; ROH, SUG-WON; PARK, KEE WOONG
To find out the suitable planting method under climate change on the yield and yield attributes of late boro rice in Bangladesh, an experiment was conducted at Bangladesh Institute of Nuclear Agriculture (BINA) farms at boro season of 2014-15. Three different sowing methods viz., direct seeding with sprouting seed & without sprouting seed and transplanting were practised to evaluate Binadhan-14 along with one check BRRI dhan 28. Due to climate change, water level goes downwards, government wants to replace boro areas as late boro to minimize irrigation water and keep the water level constant. In this study, Binadhan-14 showed higher grain yield than BRRI dhan 28. Comparative effect of transplanting method, the highest grain yield was produced in transplanting method. Direct seeding was seven days earlier than transplanted rice. However, considering crop duration direct seeding with sprouting seed will be effective by sacrificing grain yield.
Effect of herbicides on weed infestation and yield in boro rice
(Bangladesh Institute of Nuclear Agriculture (BINA), 2016) ISLAM, MD. SHAHIDUL; ISLAM, MD. MONJURUL; RAHMAN, MD. HABIBUR; BIR, MD. SHAHIDUL HAQUE; LEE, JEUNG JOO; PARK, KEE WOONG
A field experiment was conducted at the agronomy field of the Bangladesh Institute of Nuclear Agriculture (BINA), Mymensingh, Bangladesh, under wet land condition during December 2014 to May 2015. The aim was to see the effects of the weed control treatments on crop growth and yield in boro rice. Five selected herbicides (Metsulfuron-methyl 20 WG at 50 g/ha, pretilachlor 500 EC at 988 ml/ha, bensulfuran methyl 4%+acetachor 14% 18 WP at 800 g/ha, pyrazosulfuron-ethyl 10 WP at 125 g/ha and butachlor 5G at 25 kg/ha) were tested along with two hand weedings. Population density, fresh and dry weight of weed were taken. Eight weed species belonging to five families, namely, Echinochloa colonum, Paspalums crobiculatum, Monochoria vaginalis, Leersia hexandra L., Scirpus mucronatus L., Digitaria sanguinalis, Cyperus rotundus and Eclipta alba Hassk were found to grow in the experimental plots. Among the weed control treatments highest grain yield (5.73 t/ha) was produced with the treatment pyrazosulfuron-ethyl 10 WP at 125 g/ha followed by two hand weedings (5.50 t/ha). The increased yield due to application of herbicide contributed mainly from increasing the number of total tillers per plant, effective tillers per plant, filled grains per panicle and 1000-seed weight (g). Maximum benefit : cost ratio with pyrazosulfuron-ethyl 10 WP at 125 g/ha suggested that this herbicidal treatment could be used as an alternative when labour was a limiting factor in producing transplant boro rice.