Document Type : Research Paper


1 Ph. D. Candidate, Department of Agronomy and Plant Breeding, Faculty of Agriculture, Ilam University, Ilam, Iran

2 Assistant Professor, Department of Agronomy and Plant Breeding, Faculty of Agriculture, Ilam University, Ilam, Iran


A field experiment was carried out to investigate the effect of Persian clover (Trifolium resupinatum L.) as an undersown cover crop on weed control in winter oilseed rape. The experiment was conducted in a randomized complete block design with four replications in Nahavand region (km: 35) of Iran during 2017-2018. The treatments were included oilseed rape with four levels of Persian clover density (25, 50, 75 and 100 percentages of the optimum sowing rate) and two levels of weed management (weedy and weed-free). The results showed that the undresown Persian clover has a significant effect on reducing the density and aboveground dry weight of the weeds compared to the control. Oilseed rape + 25, 50, 75 and 100 percentages of Persian clover sowing rate, respectively, caused 63, 66, 80 and 91 percent reduction in weed density. The same treatments also caused 35, 51, 58 and 75 percent reduction in weed aboveground dry weight, respectively. Oilseed rape yield undersown with Persian clover was lower than oilseed rape in weed free treatment. However, oilseed rape yield in oilseed rape +75 and 100 percentages of Persian clover sowing rate was higher than oilseed rape weed infested treatment. The percentages of oil seed content in oilseed rape in all treatments undersown with Persian clover was equal to oilseed rape weed free treatment and higher than oilseed rape weed infested treatment. The land equivalent ratio in oilseed rape +75 and 100 percentages of Persian clover sowing rate was 0.92 and 1.09, respectively.


Aghaalikhani, M. & Yaghobi, S.R. (2008). Critical period of weed control in winter canola (Brassica napus L.) in a Selni-Arid Region. Pakistan Journal of Biological Sciences, 11(5), 773-777.  DOI:10.3923/pjbs.2008.773.777
Ahmadvand, G. & Hajinia, S. (2017). The Effect of Cover Crops and Integrated Control on Weed Management and Tuber Yield of Potato (Solanum tuberosum) in Different Tillage Systems. Iraninan Journal of Weed Science, 12(1), 63-87. (in Persian)
Al-Barrak, K.H.M. (2006). Irrigation interval and nitrogen level effects on growth and yield of canola (Brassica napus L.). Science Journal of Faisal U. Al-Hassa, Saudi Arabia, 7(1), 87-103.
Amin Ghafori, A., Rezvani Moghaddam, P., Nassiri Mahallati, M. & Khorramdel, S. (2014). Effect of cover crops on weeds, seed and oil yield of caster bean (Ricinus communis L.). Journal of plant produce Reaserch, 21(4), 21-41. (in Persian)
Anafjeh, Z., Fathi, G., Alami-Said, Kh., Zand, E. & Choab, A. (2009). Response of canola (Brasica napus L.) to plant densities of mustard (Sinapis arvensis L.) with emphasis on agonomic control. Iranian Journal of Crop Sciences, 11(2), 109-122. (in Persian)
Baghestani, M.A., Najafi, H. & Zand, E. (2004). Wild mustard Biology and Management (Translation).Weed Research Department Press, Iran.  71p.
Bergkvist, G., Stenberg, M., Wetterlind, J., Bath, B. & Elfstrand, S. (2011). Clover cover crops undersown in winter wheat increase yield of subsequent spring barley-Effect of N dose and companion grass. Field Crops Research, 120(2), 292-298. DOI: 10.1016/j.fcr.2010.11.001
Bezuidenhout, S. R., Reinhardt, C. F. & Whitwell. M. I. (2012). Cover crops of oats, stooling rye and three annual ryegrass cultivars influence maize and Cyperus esculentus growth. Weed Research an International Journal of Weed Biology, Ecology and Vegetation Management, 52(2), 153-160. DOI: 10.1111/j.1365-3180.2011.00900.x
Bolandi Amoghein, M., Tobeh, A., Gholipouri, A. G., Jamaati-e-Somarin, S. & Ghasemi, M. (2013). Effect of cover crop in control of weed density and some qualitative and quantitative characteristics of sunflower. International Journal of Agricultural Crop Science, 5(12), 1318-1323.
Campiglia, E., Roberto, M., Radictti, E. & Baresel, J.P. (2014). Evaluating spatial arrangement for durum wheat (Triticum durum Desf.) and subclover (Trifolium subterraneum L.) intercropping systems. Field Crop Research.168, 49-57. DOI: 10.1016/j.fcr.2014.09.003
Da Porto, C., Voinovich, D., Decorti, D. & Natolino, A. (2012). Response surface optimization of hemp seed (Cannabis sativa L.) oil yield and oxidation stability by supercriticalcarbon dioxide extraction. The Journal of Supercritical Fluids, 68, 45-51.
Echtenkamp, G.W. & Moomaw, R.S. (1989). No-till corn production in a living mulch system. Weed Technolgy, 3, 261-266.
Edalat, M., Shahrasebi, S., Kazemeini, S. A. & Emam, Y. (2017). Influence of undersown wheat and barley on weed control, growth and yield of rapeseed at various levels of nitrogen. Journal of Crop Production and Processing. 6(22), 93-104. (in Persian)
Fanaei, H. R, Kakha, Gh., Davtalab, N. & Sarananie, F. (2015). Evalution of seed yield and yield components of canola (Brassica napus L.) genotypes in response to delay planting. Applied Field Crops Research (Pajouhesh & Sazandegi), 108, 65-73. (in Persian)
Galloway, B.A. & Weston, L.A. (1996). Influence of cover crop and herbicide treatment on weed control and yield in no-till sweet corn (Zea mays L.) and pumpkin (Cucurbita maxima Duch.). Weed Technology, 10(2), 341-346.
Ghaffari, M., Ahmadvand, G., Ardakani, M. R., Nadali, I. & Elahi panah, F. (2011). The effect of winter cover crops of rye, barley and canola in the two densities on the biomass, density and diversity of natural populations of winter weeds. Journal of Crop Ecophysiology, 3(1), 1-8. (in Persian)
Gholami, H., Moghaddam, M. & Rameeh V. (2008). Estimation of Combining Ability in Rapeseed (Brassica napus L.) UsingLine ×Tester Cross Method. Seed and Plant Improvment Journal, 24(3), 399-411. (in Persian)
Hashemi, S. S., Zaefarian, F., Farahmandfar, E. & Bagheri Shiravan, M. (2018).Effect of Sowing Dates and Types of Cover Crops on Soybean (Glycine max L.) and Weeds Interaction. Agriculture Science and Sustainable Production, 28(2),167-183. (in Persian)
Hiltbrunner, J., Jeanneret, P., Liadgens, M., Stamp, P. & Streit, B. (2007). Response of weed communities to legume living mulches in winter wheat. Journal of Agronomy and Crop Science, 193(2), 93-102. DOI: 10.1111/j.1439-037X.2007.00250.x
Holman, J.D., Bussan, A.J., Maxwell, B.D., Miller, P.R. & Mickelson, J.A. (2004). Spring wheat, canola and sunflower response to Persian darnel (Lolium persicum) interference. Weed Technology. 18(3), 509-520. DOI:
Ilnicki, R. D., & Enache, A.J. (1992). Subterranean clover living mulch, an alternative method of weed control. Agriculture, Ecosystrm & Environment, 40, 249-264.
Kahrarian, B., Fatemi, R., Mohamadi, A. A. & Habibi, D. (2011). Effects of Planting Data on Seed yield and phonology of five cultivars rapeseed in Kermanshah Region. Journal of Agronomy and Plant Breeding, 6(3), 71-78. (in Persian)
Kamkar, B. & Mahdavi Damghani, A. M. (2006). Principles of Sustainable Agriculture. Academic center for Education, Culture and Research-Khorasan Razavi. Ferdowsi University Press, Mashhad, Iran. 315 p.
Kankanen, H. & Eriksson, C. (2007). Effects of undersown crops on soil mineral N and grain yield of spring barley. European Journal of Agronomy, 27(1), 25-34. DOI: 10.1016/j.eja.2007.01.010
Kruidhof, H., Bastiaans, M. L. & Kropff, M.J. (2008). Ecological weed management by cover cropping: effects on weed growth in autumn and weed establishment in spring. Weed Research. 48(6), 492–502..
Latify, S., Yousefi, A. & Jamshidi, KH. (2015). Effect of Living Mulch Application on Yield and Yield Components of Sunflower (Helianthus annuus L.) Cultivars and Weed Control. Journal of agricultural science (University of Tabriz). 25(2), 33-45. (In Persian).
Laura, M., Neculai, D., Carmen, D., Corina, C., Sebastian Toth, M. & Samira, R. (2011). Determination of the Optimal Planting Period in Persian Clover (Trifolium resupinatum L.), in Plain Conditions. Scientific Papers: Animal Science and Biotechnologies, 44 (2), 223-225.
Mahfouz, H. & Migawer, E. A. (2004). Effect of intercropping, weed control treatment and their interaction on yield and its attributes of chickpea and canola. Egypt Journal of Appl Science, 19(4), 84-101. (in Persian)
Martin, S.G., Van Acker, R.C., & Friesen, F. (2001). Critical period of weed control in spring canola. Weed Science, 49(3), 326-333.
Mazaheri, D. (1998). Intercropping. (1st Ed.) Tehran University Press.Tehran, Iran. 262p. (in Persian)
McLenaghen, R.D., Cameron, K.C., Lampkin, N.H., Daly, M.L., & Deo, B. (1996). Nitrate, leaching from plowed pasture and the effectiveness of winter catch crops in reducing leaching losses. New Zealand Journal of Agriculture Research. 39(3), 413-420.
Mirzaei, M., Dashti, S.H., Absalan, M., Siadat, A. & Fathi, G.h. (2010). Study the effect of planting dates on the yield, yield components and oil content of canola cultivars (Brassica napus L.)in Dehloran rejoin. Electronic Journal of Crop Production. 3(2), 159-176. (in Persian)
Mohamadzadeh, J. & Yaghbani, M. (2005). Effect of harvesting moisture and drying temperature of rapeseed on oil quality. Journal of Agricultural Science and Natural Resources, 12(5). (in Persian)
Mohamadzadeh, J. (2015). Investigating the effect of enzymatic and solvent extraction methods on oil quality and rapeseed protein. Iranian Journal of Seed Oil.4(1), 23-32. (in Persian)
Mohammadi, G.H.R. & Eghbal ghobadi, M. (2010). The effects of different autumn-seeded cover crops on subsequent irrigated corn response to nitrogen fertilizer. Agricultural Sciences, 1(3), 148-153. DOI: 10.4236/as.2010.13018
Namdari, M., & Mahmoudi, S. (2013). Evaluation of yield and productivity indices in planting ratios of intercropping of Chickpea (Cicer arietinum L.) and Canola (Brassica napus L.). Iranian Journal of Crop Sciences, 14(4), 346-357. (in Persian)
Ngouagio, M., Mcgiffen, M.E. & Hutchinson, C.M. (2003). Effect of cover crop and management system on weed populations in lettuce. Crop Production. 22(1), 57- 64. DOI: 10.1016/S0261-2194(02)00111-4
Olorunmaiye, P.M. (2010). Weed control potential of five legume cover crops in maize/cassava intercrop in a Southern Guinea savanna ecosystem of Nigeria. Australian Journal of Crop Science, 4(5), 324-329.
Pouryousef, M., Yousefi, A.R., Oveisi, M. & Asadi, F. (2015). Intercropping of fenugreek as living mulch at different densities for weed suppression in coriander. Crop Protection, 69, 60-64. DOI: 10.1016/j.cropro.2014.12.004
Pullaro, T.C., Marino, P.C., Jackson, D.M., Harrison, H. F. & Keinath, A. P. (2006). Effects of killed cover crop mulch on weeds, weed seeds, and herbivores. Agriculture, Ecosystems and Environment, 115(1-4), 97-104.
Ranjbar, M., Samadani, B., Rahimian, H., Jahansoz, M. R. & Bihamta, M. R. (2007). Influence of winter cover crops on weed control and tomato yield. Pajouhesh & Sazandegi. 19(4), 24-33. 74pp. (in Persian)
Ritter, W.F., Scarborough, R.W. & Chirnside, A.E.M. (1991). Nitrate leaching under irrigation on Coastal Plain soil. Journal of Irrigation and Drainage Engineering, 117(4), 490-502.
Shabahang, J., Khorramdel, S., Amin Ghafori, A. & Gheshm, R. (2013).Effects on management of crop residues and cover crop planting on density and population of weeds and agronomical characteristics of saffron (Crocus sativus L.). Journal of Saffron Research, 1(1), 57-72. (in Persian)
Tahir, M., Malik, M. A., Tanveer, A. & Ahmad, R. (2003). Competition functions of different canola-based intercropping systems. Asian Journal of Plant Science, 2(1), 9-11.  DOI: 10.3923/ajps.2003.9.11
Uchino, H., Iwama, K., Jitsuyama, Y., Yudate, T. & Nakamura, S. (2009). Yield losses of soybean and maize by competition with interseeded cover crops and weeds in organic-based cropping systems. Field Crops Research, 113(3), 342-351. DOI: 10.1016/j.fcr.2009.06.013
Yaghobi, S.R. & Aghaalikhani M. (2012). Influence of control period and interaction of natural weed population on yield and yield components in rapeseed. Iranian Journal of Field Crops Research, 9(4), 659-669. (in Persian)
Zachary, D., Daniel, C.B.B. & Mathieu, N. (2012). Winter annual weed suppression in rye-vetch cover crop mixtures. WeedTechnology, 26(4), 818-825. DOI:
Zare, M., Bazrafshan, F. & Mostafavi, K. (2012). Competition of rapeseed (Brassica napus L.) cultivars with weeds. African Journal of Biotechnology, 11(6), 1378-1385. African Journals Online.