عنوان مقاله [English]
Background and Objectives
Wheat cultivars that have suppression potential of weeds besides high yield can be a weed management method in sustainable agriculture.
Materials and Methods
In order to study the competition ability of some wheat cultivar with wild oats in three planting dates, a field experiment as factorial in complete randomize blocks with three replications was carried out at the Agricultural Research Station of Shahid Chamran University in 2013-2014. In this experiment, the factors included planting dates (16th November, 1st December and 16th December), wheat cultivars (Star, Chamran and Virinak) and competition with wild oats (with wild oat, without these weeds).
The result showed, in the competition status, Star cultivar had a higher grain yield than other cultivars in the first planting date (16th November) whereas, it had no significance different with Star and Chamran in the second planting date (1st December). When the cultivars were planted as monoculture, the highest grain yield belong to Star in the first planting date followed by the second planting data. In this condition, Virinak and Chamran in the first planting date had the lowest grain yields. Effect of the planting date on grain yield was the same trend as grain/spike; however, the high correlation with grain/spike (81%) and with thousand grains weight (59%) confirmed it. Three cultivars obtained the highest of competition index in 1st December. Although the competition and planting date resulted in decrease of grain yield, according to this investigation, the best planting date was determined 16th November and 1st December for Star cultivar. When the planting was delayed (16th December), virinak was a better choice.
According to the different growth, competitive and morphological characteristics of wheat cultivars, their responses varied in different planting dates in competition against wild oats. The grain yield of Chamran, Star and Virinak cultivars decreased 27, 25 and 23 respectively by competition with wild oats. In this respect, the dry matter of planted wild oats on 1st December than the former and latter planting dates was further damaged by every three wheat cultivars (Star, Chamran and Virinak) besides higher grain yield of wheat cultivars whereas the climatic conditions of this year with previous years differed, suggesting wheat planting with short delay as an agronomy method was assayed in the different years with regard to temperature and hydrothermal effect on wild oats germination and growth in comparison with wheat.
Bogale, A., Nefo, K., and Seboka, H. (2011). Selection of some morphological traits of bread wheat that enhance the competitiveness against wild oat (Avena fatua L.). World Journal of Agricultural Sciences, 7(2): 128-135.
Challaiah, R., Burnside, O.C., Wicks, G.A., Wicks, V.A., and Johnson V.A. (1986). Competition between winter wheat (Triticum aesstivum) cultivars and downy brome (Bromus tectorum). Weed Sciences, 34: 689-693.
Dai, J., Wiersma, J.J., Martinson, K.L., and Durgan, B.R. (2012). Influence of time of emergence on the growth and development of wild oat (Avena fatua). Weed Science, 60: 389-393.
Ebrahimi, M., Pouryousef, M., Rastgoo, M., and Saba, J. (2012). Effect of sowing date, plant density and weeds on soybean (Glycine max l.) growth indices. Journal of Plant Protection, 26(2): 178-190. [In Farsi]
Ferrise, R., Triossi, A., Stratonovitch, P., Bindi, M., and Martre, P. (2010). Sowing date and nitrogen fertilisation effects on dry matter and nitrogen dynamics for durum wheat: An experimental and simulation study. Field Crops Research, 117: 245-257.
Harker, K.N., O’Donovan, J.T., Irvine, R.B., Turkington, T.K. and Clayton, W.G. (2009). Integrating cropping systems with cultural techniques augments wild oat (Avena fatua) management in barley. Weed Science, 57: 326-337.
Iannucci, A., Fragasso, M., Platani, C., Narducci, A., Miullo, V., and Papa, R. (2012). Dynamics of release of allelochemical compound from roots of wild oat (Avena fatua L.). Agrochimica, 3: 192-185.
Iqbal, J. and Wright, D. (1997). Effects of nitrogen supply on competition between wheat and three annual weed species. Weed Sciences, 37: 391-400.
Kalateh Arabi, M., Sheikh, F., Soqi, H., and Hivehchie, J. (2011). Effects of sowing date on grain yield and its components of two bread wheat (Triticum aestivum l.) cultivars in Gorgan in Iran. Quarterly Seed and Plant Production Journal, 27-2(3): 285-296. [In Farsi]
Khan, I., Hassan, G., Khan, M.I., and Gul, M. (2007). Effect of wild oat (Avena fatua L.) population and nitrogen levels on some agronomic traits of spring wheat (Triticum aestivum L.). Turk Agriculture, 31: 91-101.
Martinson, K., Durgan, B., Forcella, F., Wiersma, J., Spokas, K., and Archer, D. (2007). An emergence model for wild oat (Avena fatua). Weed Science, 55: 584-591.
Mennan, H., Bozoglu, M., and. Işik, D. (2003). Economic thresholds of Avena spp. and Alopecurus myosuroides in winter wheat fields. Pakistan Journal of Botany, 35(2): 147-154.
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. Quarterly Iranian Journal of Crop Sciences, 14(4): 358-369. [In Farsi]
O’Donovan, J.T., Harker, K.N., Clayton, G.W., and Hall, L.M. (2000). Wild oat (Avena fatua) interference in barley (Hordeum vulgare) is influenced by barley variety and seeding rate. Weed Technology, 14:624-629.
O’Donovan, J.T., Harker, K.N., Turkington, T.K., and Clayton, W.G. (2013). Combining cultural practices with herbicides reduces wild oat (Avena fatua) seed in the soil seed bank and improves barley yield. Weed Science, 61: 328-333.
Rezaei, P., Soltani, A., Akram Ghaderi, F., and Zeinali, E. (2008). Quantifying the occurrence of thermal stesses in wheat (Triticum aestivum) in Gorgan. Journal of Agricultural Sciences and Natural Resources, 15(4): 97-106. [In Farsi]
Sharafi zadeh, M. (2005). Agronomic and phenotypic characteristics of bread wheat and barley cultivars in Khuzestan province. Agricultural Research Center Safi Abad-Dezfol. [In Farsi]
Sorkhy Lalelo, F., Dabbagh Mohammadi Nassab, A., and Javanshir, A. (2008). Assessment of leaf characteristics and root to shoot ratio in above and below ground interference of wheat (Triticum aestivum) and different densities of wild oat (Avena fatua). Water and Soil Science (Journal of Science and Technology of Agriculture and Natural Resources), 12(45): 435-446. [In Farsi]