Interactive Effect of Weeding Regimes, Rice Cultivars, and Seeding Rates Influence the Rice-Weed Competition under Dry Direct-Seeded Condition
| Autor: | Ayman El Sabagh, Tahir Hussain Awan, A. K. M. Mominul Islam, Mohmmad K. Okla, M. Jahangir Alam, Akbar Hossain, Ahmed Ali Qahtan, Sharif Ahmed, Walid Soufan |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
0106 biological sciences
media_common.quotation_subject Geography Planning and Development TJ807-830 Context (language use) resources conservation Management Monitoring Policy and Law Biology TD194-195 01 natural sciences hybrid rice Competition (biology) Renewable energy sources Yield (wine) GE1-350 Cultivar media_common Oryza sativa competitiveness Environmental effects of industries and plants Renewable Energy Sustainability and the Environment food and beverages 04 agricultural and veterinary sciences Weed control early-vigor Environmental sciences Agronomy 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Seeding Weed climate-smart production 010606 plant biology & botany weed management |
| Zdroj: | Sustainability, Vol 13, Iss 317, p 317 (2021) Sustainability Volume 13 Issue 1 |
| ISSN: | 2071-1050 |
| Popis: | Dry direct-seeded rice (Oryza sativa L.), a climate-smart and resource-efficient (labor and water) rice production technology is gaining popularity in many parts of Asian countries however, weeds are the major constraints for its early establishment and optimum productivity. Chemical weed management is effective, rapid, and also decreases weed management costs in dry direct-seeded rice (DSR) system however, chemical use for weed management have a negative effect on the environment and also have human health hazards. Therefore, integrated weed management (IWM) is the best option for the sustainability of rice production under the DSR system. Improving competitiveness against weeds, weed-competitive rice cultivars, and high seeding rates were found to be the most promising IWM strategies in DSR. In this context, a field study was conducted to evaluate the weed competitiveness of rice cultivars and seeding rates on the performance of aus rice in dry direct-seeded systems in Bangladesh. Three inbred rice cultivars (CV), namely &ldquo BRRI dhan26&rdquo &ldquo BRRI dhan48&rdquo and &ldquo BRRI dhan55&rdquo and one hybrid cultivar, &ldquo Arize&rdquo were tested in a seeding rate (SR) of 20, 40, and 80 kg ha&minus 1 under two weeding regimes (WR) of weed-free and partially-weedy. Rice grain yield was strongly affected (p < 0.01) by the interactions of WR, CV, and SR. In weed-free conditions, the yield of all three inbred cultivars was increased up to SR of 40 kg ha&minus 1 and for the hybrid cultivar, up to SR of 20 kg ha&minus 1, and with further increment of SR, there was no yield advantage. Conversely, under partially weedy conditions, the yield of three inbred cultivars increased up to SR of 80 kg ha&minus 1 however, for the hybrid cultivar, this increment was up to SR of 40 kg ha&minus 1 and thereafter, no yield gain. In weedy conditions, the higher SR compensates for the yield losses by increasing the competitiveness of rice with weeds. Across SR, the hybrid cultivar had a significantly (p < 0.01) higher weed competitive index (WCI) than all the inbred cultivars and the highest SR always had a higher WCI. |
| Databáze: | OpenAIRE |
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