The Effect of Nitrogen Fertilizer Application on Wild Oat (Avena ludoviciana L.) Competition Ability with Winter Wheat (Triticum asetivum L.) in Kermanshah Climate Condition

Document Type : Research Article

Authors

• A Jalilian
• F Mondani
• A Bagheri
• M Khoramivafa

Razi University

10.22067/gsc.v15i3.52360

Abstract

Introduction
Cereals are the main agricultural production. Wheat is an annual crop, which plays an important role in human’s source of food. Wheat grains have various nutrients such as carbohydrates, proteins and various amino acids. The annual per capita consumption of wheat is about 232 in Iran, which is about double time of the world capita consumption. Weed interference decrease the quality and quantity of wheat production. Weed management in wheat farms is one of the main cost and time-consuming practices. Wheat yield decrease significantly by weed competition. Therefore, effective weed management dependents on knowledge about the effect of competition on yield and yield components. Response of the yield and yield components to weeds competition is different in crop species during the growth period. Yield components in development stages show the maximum sensitivity to weed competition. Wild Oat is the most important weed in wheat fields. Synchrony in development stages of wild oat with development stages of wheat is much more important reason in reducing of wheat yield and yield component. On the other hand, wild oat damage on wheat yield and yield components depends on several factors including species, plant density, wheat cultivars, nutrients consumption, sowing date, row spacing, and other ecological conditions. Moreover, leaf area index, plant height, leaf area density in canopy determine competitiveness of wild oat among wheat. Therefore, the objective of the present study was to evaluate the effect of wild oat competition in different plant densities and levels of Nitrogen fertilizer consumption on yield and yield components of wheat under Kermanshah climate.
Materials and Methods
This study was conducted to evaluate the competition of wild oat and winter wheat at the Research Farm of Campus of Agricultural and Natural Resources of Razi University during 2014-2015. The experiment was arranged in a split plots based on randomized complete block design with four replications. Treatments included amounts of 30, 60, 100, and 120 % of wheat demand to nitrogen fertilizer as a main plot and wild oat plant density of 0, 25, 50, 75 and 100 in m-2 as a subplot. Fertilizer applications were based on soil test recommendations at the rates of 250 kg ha-1 urea and 100 kg ha1 super phosphate triple. All phosphate and 1/3 of urea fertilizer were applied at planting, and 2/3 of urea was applied later. The experimental farm was ploughed using a mold board plough and then it was disked twice before sowing. Wheat and wild oat seeds were planted on November 20. Wheat plant density was 400 plants m-2. The experimental plot includes 10 planting row of three meters length with 25 cm row spacing. Wild oat seeds were collected from surrounding farms and pocket companies. In order to breaking wild oat seed dormancy was used KNO3 2% about 24 hours. Irrigation was done using a surface method based on plant demand. Analysis of variance was conducted by SAS software (version 9.4). Also, post-anova analysis performed to slicing interaction of nitrogen fertilizer application and wild oat plant density. The comparison of means was done based on LSD at 5% level.
Results and Discussion
The results showed that number of spike per square meter (24%), number of grain in spike (31%), 1000 grains weight (19.4%), grain yield (49.82%), wheat total dry weight (54.1%) and wild oat total dry weight (54.2%) improved by increasing of Nitrogen fertilizer application from 30 to 120 % wheat demand. Also number of spike per square meter (12.8%), number of grain per spike (23.5%), 1000 grains weight (21.8%), grain yield (38.9%), and wheat total dry weight (27.7%) decreased by increasing of wild oat plant density from zero to 100 plant per square meter. The results of interaction of nitrogen fertilizer application and wild oat plant density showed that the extent of wild oat damage on yield and yield components of wheat were increased with the increasing of nitrogen fertilizer application.
Conclusions
Our results demonstrated that higher resources absorption by wild oat and converting them to biomass compare to wheat increased the ability of wild oat in competition for resources and production of higher biomass and, consequently caused to more damage on yield and yield components of wheat especially with more nitrogen fertilizer application. In addition, it can be concluded that an increase in application of nitrogen fertilizer to higher than wheat demand not only did not improve wheat yield and yield components but also wild oat damage increased.

Keywords

• grain yield
• Harvest index
• Plant density
• Wheat total dry weight
• Wild oat total dry weight

20.1001.1.20081472.1396.15.3.14.2

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References

1. Ebrahimpour-Noorabadi, F., Ayeneband, A., Nour-mohamadi, Gh., Mossavinia, H., and Mesgarbashi, M. 2003. Study of some wheat ecophysiologic indices as influenced by wild oat interaction. Pajouhesh & Sazandegi 73: 117-125. (in Persian with English abstract).

2. Anafjeh, Z., Fathi, G., Ebrahimpour, F., Zand, E., and Chaab, A. 2008. Study on competitiveness of wild oat (Avena fatua L.) with wheat (Triticum aestivum L.) Chamran cultivar. Iranian Society of Weed Sciences 4: 35-46. (in Persian with English abstract).

3. Armin, M., and Asgharipour, M. R. 2011. Effect of Plant Density on Wild Oat Competition with Competitive and Non-Competitive Wheat Cultivars, Agricultural Sciences in China 10: 1554-1561.

4. Asadi, S., Aynehband, A., and Rahnama, A. 2013.Wheat Yield Response to the Competition Stress and Different Levels of Nitrogen. Iranian Journal of Field Crops Research 11: 365-376. (in Persian with English abstract).

5. Blackshaw, R. E. 2004. Application method of Nitrogen fertilizer affects weed growth and competition with winter wheat. Weed Biological and Management 4: 103-113.

6. Bussan, A., and Maxwell, B. 2000. Grant submitted to Montana noxious weed trust fund. Montana State University. Ann 4: 28-32.

7. Dezhkam, H., Dejam, M., and Zakerian, A. 2011. Breaking Dormancy and seed germination of (Avena loudviciana L.). National Conference of Agriculture management, 26 May 2011. Jahrom, Islamic Azad University Jahrom. (in Persian with English abstract).

8. Dhima, K. V., and Eleftherohorinos, I. G. 2001. Influence of Nitrogen on Competition between winter cereals and sterile oat. Weed Science 49: 77-82.

9. Hassanzadeh-Dlouhy, M., Rahimian-mashhadi, H., Nasiri-mahalati, M., and Nor-mohammdi, Gh. 2002.The Competitive effects of wild oat (Avena ludoviciana L.) on winter wheat (Triticum aestivum L.) at different densities. Iranian Journal of Crop Sciences 4: 116-127. (In Persian with English abstract).

10. Hesammi, E. 2011. Different densities of weeds and wild oats (Avena ludoviciana L.) and canary grass (Phalaris Minor) on yield and yield Components of wheat Cultivar Chamran. Advances in Environmental Biology 5: 2497-2500.

11. Kazzazi, M., Bandani, A. R., and Hosseinkhani, S. 2005. Biochemical characterization of α-amylase of the Sunn pest, Eurgasterintergriceps. Entomological sciences 8: 371-377

12. USDA, Last update on August 15. 2015.

13. Koocheki, A., and Khajeh-Hosseini, M. 2008. Modern Agronomy.Jahade-e-Daneshghahi Mashhad Press. (In Persian).

14. Mondani, F., Nasiri-Mahallati, M., Koocheki, A., and Hajiyan-Shahri, M. 2015. Simulation of wild oat (Avena ludoviciana L.) competition on winter wheat (Triticum astivum L.) growth and yield. I: Model description and validation. Iranian Journal of Field Crops Research 13: 218-231. (In Persian with English abstract).

15. Mondani, F. 2012. Simulation effects of climatic change on wild oat and sunn pest damages of winter wheat under Mashhad weather conditions. Ph.D. thesis. Ferdowsi university of Mashhad. (in Persian).

16. Montazeri, M. 2007. Influence of winter wild oat (Avenaludoviciana L.) annual canary grass (Phalaris Minor) and wild mustard (Sinapis arvensis at) different density on yield and yield component of wheat. Pajouhesh & Sazandegi 74: 72-78. (In Persian with English abstract).

17. Moradi-Telavat, M. R., Siadat, S. A., Fathi, Gh., Zand, E., and Alamisaeid, Kh. 2010. Effect of Nitrogen and Herbicide Application on Competition between wheat and wild oat. Iranian Journal of Crop Sciences 12: 364-376. (in Persian with English abstract).

18. Mousavi, S. H., Siadat, S. A., Alami-Saied, Kh., Zand, E., and Bakhshandeh, A. M. 2013. Evaluation of competitive performance of spring bread wheat cultivars with wild oat weed. Iranian Journal of Crop Sciences 14: 358-369. (In Persian with English abstract).

19. Parchami, P., and Behdarvand, P. 2009. Competition of different densities of wild oat whit spring wheat under different Nitrogen levels. Crop physiology 1: 381-88. (In Persian with English abstract).

20. Qasem, J. R. 2007. Chemical control of wild oat (Avena sterilis L.) and other weeds in wheat (Triticum durum Desf.) in Jordan. Crop Protection 26: 1315-1324.

21. Seed and Plant Improvement Institute. 2012. http://www.spii.ir/spSPII/default.aspx?page = Document & app = Documents & docId = 11746. (in Persian).

22. Zarea-Feizabady, A., Sarban, H., Rajabzadeh, M., and Khazaei, H. 2009. Competitive relationship between wheat cultivars at different densities of wild oat. Iranian Journal of Crop Sciences 7: 465-472. (in Persian with English abstract).