Weed Population Dynamics, Water Productivity and Grain Yield of Durum Wheat (Triticum durum L.) in No-Tillage and Conventional Tillage Systems

Document Type : Research Article

Authors

1 Payame Noor University

2 Ferdowsi University of Mashhad

3 university of Birjand

Abstract

Introduction: Elimination or reduction of tillage in conservation agricultural systems has led to wide variations in germination, emergence, and growth of weeds and has caused variations in the density and diversity of weeds under such systems. Maintaining crop residues on the soil surface has many potential benefits in agricultural production systems; such as reducing water and wind erosions, increasing the soil organic matter content, improving the soil structure and sowing conditions, as well as a better weed management through allelopathy or physical interference provided by the crop residues. Crop residue and tillage system cause potential changes in the soil temperature and water content, which influence soil density, structure, moisture, as well as soil temperature and nutrients. Crop residues act as mulches and can effect on weed seed germination and seedling emergence. Therefore, the objectives of current study were to evaluate the effects of no-tillage systems on: (i) narrow- and broadleaved weed densities, (ii) crop yield and (iii) water productivity (WP).
Materials and Methods: A two-year field study based on a split plot experiment in a randomized complete block design with four replications was carried out in Zahedshahr, Fars province, Iran (latitude 28˚44΄N, longitude 53˚48΄E, 1180 m altitude) during 2009-10 and 2010-11 growing seasons. The planting practices including moldboard plow, disk and leveler were practiced in conventional tillage plots and crop planting was performed using a drill seeder (made by Kohorasan Co., Iran). The no-tillage plots were directly planted without any soil disturbance and removing wheat residues of the last year using a direct planter machine (model Berteni, Argentina). Furrow irrigation was used at both systems and a water counter (model WD, size DN100) was applied to measure the amount of used water based on m3 ha-1. 1 x 1 m quadrates that were installed at the center of each plot. Crop density, narrow and broadleaved weed densities were recorded at 30 days after the beginning of crop emergence. Wheat grain yield was calculated at harvest time. Comparison of the means was conducted based on protected LSD (PLSD) at 0.05 significant levels.
Results and Discussion: Tillage systems indicated a significant effect on wheat density. The average number of crop seedlings in no-tillage plots was 27 % higher than in the conventional tillage plots. Maintaining crop residues on the soil surface provided a better site for crop germination and emergence. The response to tillage system and year effects varied depending on the weed species. Results showed that the effect of tillage systems, year and their interactions were significant on the density of Lolium temulentum and Sinapis arvensis, while in the case of Phalaris minor and Hordeum spontaneum just the tillage regimen significantly influenced the weed density. L. temulentum and S. arvensis plants showed an almost similar pattern in their response to tillage systems and year effects. The density of these two species significantly decreased under no-tillage system compared with conventional tillage operations. Moreover, their densities in conventional tillage plots were significantly greater in the second year of the experiment than the first year. The lower seedling emergence of P. minor and H. spontaneum under no-tillage circumstances is not surprising, as crop residues prevent from reaching the light on the soil surface and the light requirement for germination of these species has been reported in several studies. The water productivity of the no-tillage plots was greater than of the conventional ones at both two years of the experiment. Preservation of wheat residues on the soil surface decreases soil temperature via shading and causes reduces the evaporation rate from the soil surface. Although there was no significant difference between wheat yields in the two growing seasons under conventional tillage environment, wheat yield in no-tillage plots was significantly greater in the second year of the experiment than that of the first year. Low weed densities and high WP were observed under no-tillage conditions, although the crop yield was greater in conventional tillage plots. It seems that this yield reduction in no-tillage plots is mostly due to greater C/N ratio in no-tillage plots than conventional tillage ones.
Conclusion: According to the results, although wheat yield decreased under no-till system, increased water productivity, weed control and reduced cultivation costs might justify the adoption of no-tillage cropping systems by local farmers. Other principles of conservation agriculture including suitable crop rotation systems and planting cover crops must be incorporated into the no-till cropping system. As the occurrence of autumn rainfall is usual in these dry regions, employment of the stale seedbed might be another promising technique which controls early season weed species in no-tillage systems.

Keywords

References

1- Abdullaev I., and Molden D. 2004. Spatial and temporal variability of water productivity in the Syr Darya basin, central Asia. Water Resource Research, 40: 1-11.
2- Bahrani M.J., Kheradnam M., EmamY., Ghadiri H., and Assad M.T. 2002. Effects of tillage methods on wheat yield and yield compenents continuous wheat cropping. Experimental Agriculture, 38: 389- 395.
3- Brainard D.C., Peachey R.E., Haramoto E.R., Luna J.M., and Rangarajan A. 2013. Weed ecology and nonchemical management under strip-tillage: implications for northern U.S. vegetable cropping systems. Weed Technology, 27: 218-230.
4- Chauhan B.S. 2012. Weed ecology and weed management strategies for dry-seeded rice in Asia. Weed Technology, 26: 1-13.
5- Chauhan B.S. and Abugho S.B. 2012. Interaction of rice residue and PRE herbicides on emergence and biomass of four weed species. Weed Technology, 26: 627-632.
6- Clements D.R., Benoit D.L., Murphy S.D., and Swanton C.J. 1996. Tillage effects on weed seed return and seed bank composition. Weed Science, 44: 314-322.
7- Cromar H.E., Murphy S.D., and Swanton C.J. 1999. Influence of tillage and crop residue on post-dispersal predation of weed seeds. Weed Science, 47: 184-194.
8- Dahiya R., Ingwersen J., and Streck T. 2007. The effect of mulching and tillage on water and temperature regimes of a loess soil: experimental findings and modeling. Soil and Tillage Research, 96: 52- 63.
9- Fernandez R., Quiroga A., Noellemeyer E., Funaro D., Montoya J., Hitzmann B., and Peinemann N. 2008. A study of the effect of the interaction between site-specific conditions, residue cover and weed control on water storage during fallow. Agriculture Water Management, 95: 1028-1040.
10- Glab T., and Kulig B. 2008. Effect of mulch and tillage system on soil porosity under wheat (Triticum aestivum). Soil and Tillage Research, 99: 169- 178.
11- Gutterman Y., Corbineau F., and Come D. 1996. Dormancy of Hordeum spontaneum caryopses from a population on the Negev desert highlands. Journal of Arid Environments, 33: 337-345.
12- Hartwig N.L., and Ammon H.U. 2002. Cover crops and living mulches. Weed Science, 50: 688–699.
13- Holm R.E. 1972. Volatile metabolites controlling germination in buried weed seeds. Plant Physiology, 50: 293-297.
14- Hosseini M., Zamani G.R., Khazaei M., Alizadeh H.M., and Eslami S.V. 2009. Optimization of wheat residue rate and sunflower (Helianthus annus L.) density on weed control and crop growth using surface analysis regression method. Iranian Journal of Weed Science, 5: 91-105. (in Persian with English abstract)
15- Jin H., Qingjie W., Hongwen L., Lijin L., and Huanwen G. 2009. Effect of alternative tillage and residue cover on yield and water use efficiency in annual double cropping system in North China Plain. Soil and Tillage Research, 104: 198–205.
16- Landis D.A., Wratten S.D., and Gurr G.M. 2000. Habitat management to conserve natural enemies of arthropod pests in agriculture. Annual Review of Entomology, 45: 175-201.
17- Liebman M., Mohler C.L. and Staver C.P. 2006. Ecological management of agricultural weeds. Cambridge University Press, United Kingdom.
18- Locke M.A., Reddy K.N., and Zablotowicz R.M. 2002. Weed management in conservation crop production systems. Weed Biology and Management, 2: 123-132.
19- Metzger J.D. 1983. Promotion of germination of dormant weed seeds by substituted phthalimides and gibberellic acid. Weed Science, 31: 285-289.
20- Mohler C.L., and Teasdale J.R. 1993. Response of weed emergence to rate of Vicia villosa Roth and Secale cereale L. residue. Weed Research, 33: 487-499.
21- Mojab M., Zamani G.R., and Eslami S.V. 2010. The effect of wheat residue and trifluralin rates (%48 EC) on weed species composition of sunflower (Helianthus annuus) in Birjand. Iran. Electronic Journal of Crop Production, 24: 294-302. (in Persian with English abstract)
22- Muoni T., Rusinamhodzi L., and Thierfelder C. 2013. Weed control in conservation agriculture systems of Zimbabwe: Identifying economical best strategies. Crop Protection, 53: 23-28.
23- Norsworthy J.K. 2008. Effect of tillage intensity and herbicide programs on changes in weed species density and composition in the southeastern coastal plains of the United States. Crop Protection, 27: 151-160.
24- Ohadi S., Rahimian Mashhadi H., and Tavakol-Afshari R. 2009. Seasonal changes in germination responses of seeds of the winter annual weed littleseed canarygrass (Phalaris minor) to light. Weed Science, 57: 613-619.
25- Peachey R.E., William R.D., and Mallory-Smith C. 2004. Effect of no-Till or conventional planting and cover crops residues on weed emergence in vegetable row crops. Weed Technology, 18: 1023-1030.
26- Reader R.J. 1991. Control of seedling emergence by ground cover: a potential mechanism involving seed predation. Canadian Journal of Botany, 69: 2084- 2087.
27- Reddy K.N. 2003. Impact of rye cover crop and herbicides on weeds, yield, and net return in narrow-row transgenic and conventional soybean (Glycine max). Weed Technology, 17: 28-35.
28- Reeves D.W., Price A.J., and Patterson M.G. 2005. Evaluation of three winter cereals for weed control in conservation-tillage in nontransgenic cotton. Weed Technology, 19: 731-736.
29- Schlegel A.J., and Grant C.A. 2006. Soil fertility, in: Dryland Agriculture, ed. Peterson, G.A., Unger, P.W. Payne, W.A. Second ed. Madison-Wisconsin Publishers, pp. 141-194.
30- Sharma R.K., Srinivasa Babu K., Chhokar R.S., and Sharma A.K. 2004. Effect of tillage on termites, weed incidence and productivity of spring wheat in rice–wheat system of North Western Indian plains. Crop Protection, 23: 1049-1054.
31- Steadman K.J., Bignell G.P., and Michael P.J. 2004. Stimulating dormancy release and emergence of annual ryegrass (Lolium rigidum) seeds using short-term hydrated storage in darkness. Australian Journal of Agriculture Research, 55: 787–795.
32- Stevenson F.J. 1986. Cycles of soil: carbon, nitrogen, phosphorus, sulfur, micronutrients. New York: Wiley-Interscience.
33- Tharp B. E., and Kells J. J. 2000. Effect of soil-applied herbicides on establishment of cover crop species. Weed Technology, 14: 596–601.
34- Teasdale J.R. and Daughtry C.S.T. 1993. Weed suppression by live and desiccated hairy vetch (Vicia villosa). Weed Science, 41: 207-212.
35- Teasdale J.R., and Mohler C.L. 1993. Light transmittance, soil temperature and soil moisture under residue of hairy vetch and rye. Agronomy Journal, 85: 673-680.
36- Teasdale J.R., and Mohler C.L. 2000. The quantitative relationship between weed emergence and the physical properties of mulches. Weed Science, 48: 385-392.
37- Tuesca D., and Puricelli E. 2007. Effect of tillage systems and herbicide treatments on weed abundance and diversity in a glyphosate resistant crop rotation. Crop Protection, 26: 1765-1770.
38- Tuesca D., Puricelli E., and Papa J.C. 2001. A long-term study of weed flora shifts in different tillage systems. Weed Research, 41: 369-382.
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