Quadratic Functions for Wheat cv. Shiroudi Productions from Water Stress Conditions

This study was conducted to develop production function of winter wheat (cv. Shiroudi) under water stress condition in Moghan (north-west of Iran) climate condition. The experimental treatments were based on irrigation events as two (I1), three (I2), four (I3) and five (I4) irrigation during wheat growing season. Results revealed the applying four and five irrigation events produced similar grain, biological, straw yields, 1000-grain weight and harvest index. The grain yield ranged from 5.8 to 6.9 t ha-1, straw yield were from 5.6 to 6.4 t ha-1 and biological yield ranged from 12.1 to 13.3 t ha-1. Based on the findings of the present study, there are four irrigation events with normal irrigation are sufficient for wheat cv. Shiroudi to obtain optimum production in Moghan and similar climate conditions. Production polynomial models as a function of applied water were worked out by regression analysis for grain, straw and biological yields, harvest index and 1000-grain weight. These functions can be applied to predict grain, straw and biological yields of wheat by available water for irrigation.

Keywords:

Winter wheat, Wheat yield, Limited irrigation Irrigation management,

PDF

___

[1] Abdmishani, S., Jafari Shabestari, J. (1986). Effect of different irrigation regimes and seeding rate on yield of winter wheat. Iranian Journal of Agricultural Science, 17(4):45-50.
[2] Doorenbos , J., Kassam, A. H. (1979). Yield response to water, Irrigation and Drainage Paper 33. Food and Aricultural Organization of the United Nations. Rome, Italy.
[3] English, M., Nakamura, B. (1989). Effects of deficit irrigation and irrigation frequency on wheat yields. J. Irrig. Drain. Eng., 115:172-184.
[4] FAO.FAOSTAT.Agriculture. Rome. (2014). Available in http://faostat.fao.org/site/567/ DesktopDefault. aspx?PageID=567#ancor. Accessed at: July 2014.
[5] Hexem, R. W. , Heady, E. O. (1978). Water production function for irrigated agriculture. Center for Agricultural and Rural Development. Iowa State University Press, Ames, IA.
[6] Hanks, R.J., Sorensen, R.B. (1984). Harvest index as influenced in spring wheat by water stress.p.205-209. in W. Day and R.K. Atkins (ed.) Wheat growth and modeling. NATO ASI series A: Life Science Vol. 86. Plenum Press, New York.
[7] Jalota S. K., Soob A., Chahal G. B. S., Choudhury, B.U. (2006). Crop water productivity of cotton (Gossypium hirsutum L.)– wheat (Triticum aestivum L.) system as influenced by deficit irrigation, soil texture and precipitation agricultural water management. Agricultural Water Management, 84: 137–146.
[8] Mahmood, N., Akhtar B. and Saleem, M. (2002). Scheduling irrigation in wheat grown at different seed rates. Asian Journal of Plant Sciences, 1(2): 136-139.
[9] Moghaddam, M. (1999). Advnced engineering statistics. Faculty of Agriculture, Tabriz University (in Farsi). Iran, 185p.
[10] Musick, J. T., Porter, K.B. (1990). Wheat. In: Irrigation of Agricultural Crops, Edited by Stewart and Nielsen. 1990. pp: 1217. American Society of Agronomy, Crop Science Society of America and Soil Science Society of America.
[11] Nasseri, A. (2009). Precipitation variation in agricultural plain of Moghan, North-West Iran. J. Agric. Soc. Sci., 5:18-22.
[12] Nasseri, A. (2013). Responses of grain and straw yields of winter wheat (cv. Tajan) to limited irrigation in semi-arid environment. Anadolu J Agr Sci, 28 (1): 19-23.
[13] Oweis, T. (1997). Supplemental irrigation: a highly water – efficient practice. Pp:16, ICARDA. Aleppo. Syria.
[14] Passioura, J. B. (1977). Grain yield, harvest index and water use of wheat. J. Aust. Inst. Agric. Sci., 43:117-120.
[15] Zhang, J., Sui, X., Li, B., Su, B., Li, J., Zhou, D. (1998). An improved water- use efficiency for winter wheat grown under reduced irrigation. Field Crops Res., 59: 91-98.
[16] Zhang B. C., Li, F. M., Huang, G., Z.-Y., Zhang Y. (2006). Yield performance of spring wheat improved by regulated deficit irrigation in an arid area. Agricultural Water Management, 79: 28–42.