Economic weeding method for irrigated rice production in Bangladesh |
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| Affiliation: | 1. Crop and Environmental Science Division (CESD), International Rice Research Institute (IRRI), Los Banos, Laguna, Philippines;2. International Maize and Wheat Improvement Center (CIMMYT), South Asia Regional Office, Kathmandu, Nepal;1. Georg-August-University of Goettingen, Department of Crop Sciences, Grassland Science, Location Vechta, Driverstraße 22, 49377 Vechta, Germany;2. Georg-August-University of Goettingen, Department of Crop Sciences, Grassland Science, Von-Siebold-Straße 8, 37075 Göttingen, Germany;1. Water Systems and Global Change Group, Wageningen University, The Netherlands;2. Water Resources Management Group, Wageningen University, The Netherlands;3. Department of Irrigation and Water Management, Bangladesh Agricultural University, Bangladesh;1. Africa Rice Center, 01 BP 2031 Cotonou, Benin;2. AGRHYMET Regional Center, BP 11011 Niamey, Niger |
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| Abstract: | The study was conducted at the Bangladesh Rice Research Institute Regional Station, Comilla, during three rice growing seasons. The experiment consists of six weeding treatments with three replications. The objective of the experiment was to determine an economic weeding method as well as to improve water management practices of paddy rice. The study indicates that the continuous ponding (100–150 mm) is not effective for weed control and high yield. Similarly, continuous ponding of 30–70 mm with one hand weeding is not economically sound. Two hand weeding or one hand weeding plus herbicides can be recommended where labors are available. Otherwise only herbicides should be used to make weeding economic for profitable rice production. The study reveals that continuous ponding required about 1.5–2.0 times more water than intermittent irrigation. |
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