Fertilizer Placement Affects Weed Growth and Grain Yield in Dry-Seeded Rice (Oryza sativa L.) Systems

Bhagirath S. Chauhan, Seth B. Abugho

Crop and Environmental Sciences Division, International Rice Research Institute, Los Ba?os, Philippines..

DOI: 10.4236/ajps.2013.46155                

Abstract

A study was conducted in a split-plot design to evaluate the effect of fertilizer placement method on weed growth and grain yield in a dry-seeded rice (DSR) system. Main-plot treatments were four fertilizer placement methods: between narrow rows (between 15-cm-wide rows of the pattern 25-15-25 cm), between uniform rows (between 20-cm-wide rows), within uniform rows, and surface broadcast. Subplot treatments were three weed control methods: herbicide-treated, nontreated, and weed-free. Weed biomass was greater in the nontreated plots than in the herbicide-treated plots. Herbicide application reduced weed biomass by 89% to 99% compared with the nontreated control. Fertilizer placement did not influence weed biomass in the herbicide-treated plots; however, it greatly influenced biomass in the nontreated plots. Fertilizer placement on the surface increased weed biomass (69 -71 g·m^–2) compared with the placement of fertilizer below the soil surface (37 -57 g·m^–2). Fertilizer placement did not influence weed density and biomass at 60 days after planting. Nontreated plots yielded 700 to 2080 kg·ha^–1. Grain yield was similar between the herbicide-treated (2660-3250 kg·ha^–1) and weed-free (2620-3430 kg·ha^–1) plots. Grain yield was not influenced when basal fertilizer was banded within (2390-2500 kg·ha^–1) or between rows (2530-2650 kg·ha^–1). However, grain yield decreased when basal fertilizer was broadcast on the soil surface (2200 kg·ha^–1). The results of our study demonstrated that rice yield was usually lower with surface broadcast of fertilizer than with subsurface fertilizer treatments. In conclusion, surface broadcast of basal fertilizer may result in high weed pressure in DSR systems.

Keywords

Nitrogen; Fertilizer; Weed Biomass; Weed Density; Placement; Asia

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1]	B. S. Chauhan, “Weed Ecology and Weed Management Strategies for Dry-Seeded Rice in Asia,” Weed Technology, Vol. 26, No. 1, 2012, pp. 1-13. doi:10.1614/WT-D-11-00105.1
[2]	B. S. Chauhan, G. Mahajan, V. Sardana, J. Timsina and M. L. Jat, “Productivity and Sustainability of the Rice-Wheat Cropping System in the Indo-Gangetic Plains of the Indian Subcontinent: Problems, Opportunities, and Strategies,” Advances in Agronomy, Vol. 117, No. 1, 2012, pp. 315-369. doi:10.1016/B978-0-12-394278-4.00006-4
[3]	B. S. Chauhan and D. E. Johnson, “The Role of Seed Ecology in Improving Weed Management Strategies in the Tropics,” Advances in Agronomy, Vol. 105, 2010, pp. 221-262. doi:10.1016/S0065-2113(10)05006-6
[4]	K. J. Kirkland and H. J. Beckie, “Contribution of Nitrogen Fertilizer Placement to Weed Management in Spring Wheat (Triticum aestivum),” Weed Technology, Vol. 12, No. 1, 1998, pp. 507-514.
[5]	J. M. DiTomaso, “Approaches for Improving Crop Competitiveness through the Manipulation of Fertilization Strategies,” Weed Science, Vol. 43, 1995, pp. 491-497.
[6]	R. E. Blackshaw, G. Semach, X. Li, J. T. O’Donovan and K. N. Harker, “Tillage, Fertilizer and Glyphosate Timing Effects on Foxtail Barley (Hordeum jubatum) Management in Wheat,” Canadian Journal of Plant Science, Vol. 80, No. 3, 2000, pp. 655-660. doi:10.4141/P99-132
[7]	H. L. Carlson and J. E. Hill, “Wild Oat (Avena fatua) Competition with Spring Wheat: Effects of Nitrogen Fertilization,” Weed Science, Vol. 34, No. 1, 1986, pp. 29-33.
[8]	B. Melander, A. Cirujeda and M. H. Jørgensen, “Effects of Inter-Row Hoeing and Fertilizer Placement on Weed Growth and Yield of Winter Wheat,” Weed Research, Vol. 43, No. 6, 2003, pp. 428-438. doi:10.1046/j.0043-1737.2003.00359.x
[9]	R. E. Blackshaw, L. J. Molnar and H. H. Janzen, “Nitrogen Fertilizer Timing and Application Method Affect Weed Growth and Competition with Spring Wheat,” Weed Science, Vol. 52, No. 5, 2004, pp. 614-622. doi:10.1614/WS-03-104R
[10]	A. P. Everaarts, “Response of Weeds to the Method of Fertilizer Application on Low-Fertility Acid Soils in Suriname,” Weed Research, Vol. 32, No. 5, 1992, pp. 391-397. doi:10.1111/j.1365-3180.1992.tb01900.x
[11]	GenStat 8.0, “GenStat Release 8 Reference Manual,” VSN International, Oxford, 2005, p. 343.
[12]	D. C. Thill, J. T. O’Donovan and C. A. Mallory-Smith, “Integrated Weed Management Strategies for Delaying Herbicide Resistance in Wild Oats,” Phytoprotection, Vol. 75, No. (Suppl.), 1994, pp. 61-70. doi:10.7202/706072ar
[13]	B. S. Chauhan, V. P. Singh, A. Kumar and D. E. Johnson, “Relations of Rice Seeding Rates to Crop and Weed Growth in Aerobic Rice,” Field Crops Research, Vol. 121, No. 1, 2011, pp. 105-115. doi:10.1016/j.fcr.2010.11.019
[14]	G. Mahajan and B. S. Chauhan, “Effects of Planting Pattern and Cultivar on Weed and Crop Growth in Aerobic Rice System,” Weed Technology, Vol. 25, No. 4, 2011, pp. 521-525. doi:10.1614/WT-D-11-00025.1
[15]	B. S. Chauhan and D. E. Johnson, “Row Spacing and Weed Control Timing Affect Yield of Aerobic Rice,” Field Crops Research, Vol. 121, No. 2, 2011, pp. 226-231. doi:10.1016/j.fcr.2010.12.008
[16]	K. Ampong-Nyarko and S. K. De Datta, “A Handbook for Weed Control in Rice,” International Rice Research Institute, Los Baños, Philippines, 1991, p. 113.
[17]	B. S. Chauhan and S. B. Abugho, “Weed Management in Mechanized-Sown, Zero-Till Dry-Seeded Rice,” Weed Technology, Vol. 27, No. 1, 2013, pp. 28-33. doi:10.1614/WT-D-12-00088.1
[18]	B. S. Chauhan and J. Opeña, “Effect of Tillage Systems and Herbicides on Weed Emergence, Weed Growth, and Grain Yield in Dry-Seeded Rice Systems,” Field Crops Research, Vol. 137, No. 1, 2012, pp. 56-69. doi:10.1016/j.fcr.2012.08.016
[19]	D. B. Ishaya, S. A. Dadari and J. A. Y. Shebayan, “Evaluation of Herbicides for Weed Control in Three Varieties of Upland Rice (Oryza sativa L.) in the Nigerian Savannah,” Crop Protection, Vol. 26, No. 10, 2007, pp. 1490-1495. doi:10.1016/j.cropro.2006.12.015
[20]	B. S. Chauhan and S. B. Abugho, “Effect of Growth Stage on the Efficacy of Postemergence Herbicides on Four Weed Species of Direct-Seeded Rice,” The Scientific World Journal, 2012, Article ID: 123071, 7 p.
[21]	R. E. Blackshaw, G. Semach and H. H. Janzen, “Fertilizer Application Method Affects Nitrogen Uptake in Weeds and Wheat,” Weed Science, Vol. 50, No. 1, 2002, pp. 634-641. doi:10.1614/0043-1745(2002)050[0634:FAMANU]2.0.CO;2
[22]	V. L. Cochran, L. A. Morrow and R. D. Schirman, “The Effect of N Placement on Grassweeds and Winter Wheat Responses in Three Tillage Systems,” Soil Tillage Research, Vol. 18, No. 4, 1990, pp. 347-355. doi:10.1016/0167-1987(90)90119-X