Effect of row spacing and weed management practices on dry direct-seeded spring rice
Keywords:Dry-DSR, Weed density, Weed index, Yield, Nepal
Weeds are the major burden for rice-growing farmers in the case of direct-seeded rice due to the preemptive competition of weed in the species early seedling stage. A field experiment was carried out during the spring season in 2021 to evaluate the effect of different weed management practices and row spacing on dry directed-seeded spring rice under the Prime Minister Agriculture Modernization Project (PMAMP) at Rice Super Zone, Kanchanpur, Nepal. The experiment was laid out in a two-factorial randomized complete block design (RCBD) with twelve treatments and three replications. The highest number of effective tillers per m2 was obtained in weed-free plots (531.67), which is statistically similar to Pretilachlor fb 1HW (505.42). Row spacing of 10 cm showed a significantly higher number of effective tillers per square meter (521.94). A higher grain yield was observed in weed-free plots (6397.87 kg.ha-1), which is followed by Pretilachlor fb 1HW, which is statistically similar to other management practices except for weed check. All the management practices were found effective in reducing weed parameters such as weed density, weed dry weight, and weed index as compared to weed checks. A positive relation was recorded between plant height at 90 DAS and grain yield, thousand-grain weight, and grain yield, and a negative relation was recorded between weed density, weed dry biomass, and grain yield. It is recommended to apply Pretilachlor fb 1HW with 10 cm row spacing for effective weed control and to increase the yield of dry direct-seeded rice.
Agriculture Information and Communication Centre (2019). Krishi diary. Lalitpur, Nepal: Ministry of agriculture, land reforms and cooperative.
Akbar, N., Jabran, K., & Ali, M. A. (2011). Weed management improves yield and quality of direct seeded rice. Australian Journal of Crop Science, 5(6), 688–694.
Ayansina, A. D. V., & Oso, B. A. (2006). Effect of two commonly used herbicides on soil microflora at two different concentrations. African Journal of Biotechnology, 5(2), 129–132.
Chauhan, B. S., & Johnson, D. E. (2011). Row spacing and weed control timing affect yield of aerobic rice. Field Crops Research, 121(2), 226–231. https://doi.org/10.1016/j.fcr.2010.12.008
Chauhan, B. S., Ngoc, S. T. T., Duong, D., & Le Ngoc, P. (2014). Effect of pretilachlor on weedy rice and other weeds in wet-seeded rice cultivation in South Vietnam. Plant Production Science, 17(4), 315–320. https://doi.org/10.1626/pps.17.315
Choudhary, V., & Dixit, A. (2018). Herbicide weed management effect on weed dynamics, crop growth and yield in direct-seeded rice. Indian Journal of Weed Science, 6–12. https://doi.org/10.5958/0974-8164.2018.00002.3
Dangol, R., Pandey, S. R., Shrestha, B., Thapa Magar, D. B., & Bhattarai, N. (2020). Effects of different weed management practices on growth and yield of direct-seeded spring rice in Jhapa, Nepal. Cogent Food & Agriculture, 6(1), 1825040. https://doi.org/10.1080/23311932.2020.1825040
Gathala, M. K., Ladha, J. K., Saharawat, Y. S., Kumar, V.., Kumar, V., & Sharma, P. K. (2011). Effect of Tillage and Crop Establishment Methods on Physical Properties of a Medium-Textured Soil under a Seven-Year Rice−Wheat Rotation. Soil Science Society of America Journal, 75(5), 1851–1862. https://doi.org/10.2136/sssaj2010.0362
Gill, G. S. & Vijaya Kumar, K. (1969). Weed Index—A New Method of Reporting Weed Control Trials. Indian Journal of Agronomy, 14, 96−98.
Ishaya, D., Dadari, S., & Shebayan, J. (2007). Evaluation of herbicides for weed control in three varieties of upland rice (Oryza sativa L.) in the Nigerian Savannah. Crop Protection, 26(10), 1490–1495. https://doi.org/10.1016/j.cropro.2006.12.015
Jabran, K., & Chauhan, B. S. (2015). Weed management in aerobic rice systems. Crop Protection, 78, 151–163. https://doi.org/10.1016/j.cropro.2015.09.005
Kumar, V., & Ladha, J. K. (2011). Direct Seeding of Rice. Recent Developments and Future Research Needs. Advances in Agronomy, 111, 297–413. https://doi.org/10.1016/B978-0-12-387689-8.00001-1
Matloob, A., Khaliq, A., & Chauhan, B. S. (2015). Weeds of direct-seeded rice in Asia: problems and opportunities. Advances in Agronomy, 130, 291–336. https://doi.org/10.1016/bs.agron.2014.10.003
Mishra, J. S., Rao, A. N., Singh, V. P., & Kumar, R. (2017). Weed management in major field crops. Advances in Weed Management (pp. 1-21). Indian Society of Agronomy
Mishra, J. S., & Singh, V. P. (2008). Integrated weed management in dry-seeded irrigated rice (Oryza sativa). Indian Journal of Agronomy, 53(4), 299–305.
Ministry of Agriculture and Livestock Development (2022). Statistical Information in Nepalese Agriculture. https://moald.gov.np/wp-content/uploads/2022/07/STATISTICAL-INFORMATION-ON-NEPALESE-AGRICULTURE-2077-78.pdf
Paudel, M. N. (1995). Nutrient management for Sulphan buri-900 rice variety in acid sulfate soil with green leaf manure [Master’s thesis, Asian Institute of Technology].
Paudel, M. (2011). Rice (Oryza sativa L) cultivation in the highest elevation of the world. Agronomy Journal of Nepal, 2, 31–41. https://doi.org/10.3126/ajn.v2i0.7519
Payman, G., & Singh, S. (2008). Effect of Seed Rate, Spacing and Herbicide Use on Weed Management in Direct Seeded Upland Rice (Oryza sativa L.). Indian Journal of weed Science, 40(1 & 2), 11–15. https://isws.org.in/IJWSn/File/2008_40_Issue-1&2_11-15.pdf
Phukan, J., Kalita, S., & Bora, P. (2021). Weed management in direct seeded rice: A review. Journal of Pharmacognosy and Phytochemistry, 10(2), 742–748.
Ranjit, J. D., & Suwanketnikom, R. (2005). Response of weeds and yield of dry direct seeded rice to tillage and weed management. Agriculture and Natural Resources, 39(2), 165–173.
Roy, T. S., Pulok, A. I., Rahman, M., & Hussain, A. (2014). Effect of varieties and row spacing on the growth and yield of AUS rice. Bangladesh Research Publications Journal, 10(2), 138–144.
Subbaiah, S. V. (2008). Studies on weed and water management in direct- seeded rice. In Y. Singh, V. P. Singh, B. Chauhan, A. Orr, A. M. Mortimer, D. E. Johnson, & B. Hardy (eds.), Direct Seeding of Rice and Weed Management in the Irrigated Rice-wheat Cropping System of the Indo-Gangetic Plains (pp. 177–189). Int. Rice Res. Inst. http://books.irri.org/9789712202360_content.pdf
Yadanar, S. M., Mar, S. S., Than, A. A., & Ngwe, K. (2018). Effect of Nitrogen and Potassium on Yield and Yield components of Rice. Proceedings of the eleventh Agricultural Research Conference, Yezin Agricultural University, Myanmar.
Zhao, C., Jiang, H., Ren, C., Yin, Y., & Li, Y. (2007). Studies on key techniques of sowing rice directly on dry land for high yield and high efficiency. J. Jilin Agr. Sci., 32, Pp. 9–11.
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