Document Type : Research Paper

Authors

1 M.Sc. Student, Plant Production Department, College of Agriculture and Natural Resources, Gonbad Kavous University, Gonbad Kavous, Iran

2 Assistant Professor, Plant Production Department, College of Agriculture and Natural Resources, Gonbad Kavous University, Gonbad Kavous, Iran

Abstract

Understanding the performance potential and the gap between the actual yields of crops with the achievable function is necessary to diagnose the limiting factors of performance. The present study was conducted based on the method of CPA in 50 fields of Zavkooh villi (Kalaleh, Golestan, Iran) in 2016 and 2017. In this study all information related to management practices, soil characteristics and farmer socio- economic status were measured and recorded. In the comparative performance analysis (CPA) method, using stepwise regression, the relationship between variables and yield was considered. And yield gap rate, its causes factors and it was also estimated the contribution of each of these factors to the creation of a yield gap. The results showed that between the average real yield (2308 kg ha-1) and the yieldable yield (4123 kg ha-1), there is 1818 kg per hectare of vacuum. Accordingly, the most important factors in yield gap for the region included: field size with 21.4 percent, Summer plowing with 15 percent, The time of land preparation and plowing with 14.7 percent, nitrogen fertilizer with 14.6 percent, potassium fertilizer with 14 percent, weeds density per unit area with 10.8 percent), seed treatment with 8.1 percent and Subsoiler with 1.4 percent.

Keywords

Abravan, P., Soltani A., Majidian M. & Mohsenabadi, GH. (2016). Study of field management factors and underlying reasons limiting yield of oilseed rape in east of Golestan province using CPA method. Agroecology Journal, 7(2), 46-60. (in Persian)
Ahmad, G., Jan A., Arif M., Jan M.T. & Khattak, R.A. (2007). Influence of nitrogen and sulfur fertilization on quality of canola (Brassica napus L.) under rainfed conditions. Journal of Zhejiang University Science Biology, 8(10), 731-737. Doi: 10.1631/jzus.2007.B0731.
Ahmad, G., Jan A., Arif M., Jan M.T. & Shah, H. (2011). Effect of nitrogen and sulfur fertilization on yield components, seed and oil yields of canola. Journal of Plant Nutrition, 34, 2069-2082. https://doi.org/10.1080/01904167.2011.618569.
Azizi, M., Soltani A. & Khavari Khorasani, S. (1999). Brassica Oilseeds: Production and utilization. Jahad Daneshgahi Publication of Mashhad. 230 pp. (in Persian)
Bagherani, N. & Shimi, P. (2001). Evaluation of some herbicides for weed control in oilseed rape (Brassica napus L.). Journal of Agricultural Sciences and Natural Resources. 8(1), 157-163.
Banuelos, G.S., Bryla D.R. & Cook, C.G. (2002). Vegetative production of kenaf and canola under irrigation in central California. Indian Crop Production, 15, 237-245. DOI: 10.1016/S0926-6690(01)00119-4
Blackshaw, R. E., Lemerle D., Mailer R. & Young, K. R. (2002). Influence of wild radish on yield and quality of canola. Weed Science, 50(3), 344-349. DOI: https://doi.org/10.1614/0043-1745(2002)050[0344:IOWROY]2.0.CO;2
Brisson, N., Gary C., Justes E., Roche R., Mary B., Ripoche D., Zimmer D., Sierra J., Bertuzzi P., Burger P., Bussiere F., Cabidoche Y.M., Cellier P., Debaeke P., Gaudillere J.P., Henault C., Maraux F., Seguin B. & Sinoquet, H. (2002). An overview of the crop model STICS. Europian Journal of Agronomy, 18, 309-332. https://doi.org/10.1016/S1161-0301(02)00110-7
Chaudhary, R.C. (2000). Strategies for bridging the yield gap in rice: A regional perspective. In: Papadimitriou, M.K., Dent, F.J., Herath, E.M. (Eds). Bridging the rice yield gap in the Asia-Pacific region. Food and Agriculture Organization of the United Nations Regional Office for Asia and the Pacific Bangkok, Thailand, pp: 201-214.
             Cheema, M. A., Malik M. A., Hussain A., Shah S. H. & Basra, S.M.A. (2011). Effects of time and rate of nitrogen and phosphorus application on the growth and the seed and oil yields of canola (Brassica napus L.) Journal of Agronomy and Crop Science, 186(2), 103-110. https://doi.org/10.1046/j.1439-037X.2001.00463.x
De Bie, C.A.J.M. (2000). Yield gap studies through comparative performance analysis of agroecosystems. International Institute for Aerospace and Earth Science (ITC), Enschede. The Netherlands. 234 p.
Egli, D.B. & Hatfield, J.L. (2015). Yield gaps and yield relationships in central U.S. soybean production systems. Journal of Agronomy, 106, 560-571. DOI: 10.2134/agronj2013.0364
Elliott, R. H., Franke C. & Rakow, G.F.W. (2008). Effects of seed size and seed weight on seedling establishment, vigour and tolerance of Argentine canola (Brassica napus) to flea beetles, Phyllotreta spp. Canadian Journal of Plant Science, 88(1), 207-217. DOI: 10.4141/CJPS07059
Hejarpoor, A., Soltani A. & Torabi, B. (2015). Using boundary line analysis in yield gap studies: Case study of wheat in Gorgan. Journal of Crop Production, 8(4), 183-201. (in Persian)
Hejarpoor, A., Soltani A., Zeinali E., Kashiri H., Aynehband A. & Nazeri, M. (2017). Evaluation of wheat (Triticum aestivum L.) yield gap in Golestan province of Iran using comparative performance analysis (CPA) method. Iranian Journal of Crop Sciences, 19(2), 86-101. (in Persian)
Hosseini, S.J.F. & Haji Maleki, H. (2012). The Role of Social Factors in Production of Canola in Qazvin Province. International Journal of Agricultural Science and Research, 2(2), 17-20. (in Persian)
Kordi, N., Mehraban A. & Piri, I. (2014). Effect of planting pattern and cultivar on some quantitative characteristics of canola.  International Journal of Farming and Allied Sciences, 3(7), 750-753. (in Persian)
Lisson, S. N., Kirkegaard J. A., Robertson M. J. & Zwart, A. (2007). What is limiting canola yield in suthern New South Wales? A diagnosis of causal factors. Animal Production Science, 47(12), 1435-1445. DOI: 10.1071/EA07041.
Meghdadi, N., Soltani A., Kamkar B. & Hejarpoor, A. (2016). Agroecological zoning of Zanjan province for estimating yield potential and yield gap in dryland-base chickpea production systems. Journal of Plant Production Research, 21(3), 27-49. (in Persian)
Nehbandani, A., Soltani A., Zeinali E. & Hoseini, F. (2016). Analyzing soybean yield constraints in Gorgan and Aliabad katul using CPA method. Agroecology Journal, 7(1), 109-123. (in Persian)
Rezaei, A. & Soltani, A. (1998). An introduction to Applied Regression Analysis, 4th ed. Isfahan University of Technology. Esfahan, Iran. (in Persian)
Smith, E. G., Carew R. & Warner, K. (2013). Decision Making among Canola Growers in the Prairie Provinces: The Impact of Farm and Grower Characteristics. Annual Meeting, August 4-6, Washington, D.C. from Agricultural and Applied Economics Association Contact information at EDIRC. (No. 149834). Agricultural and Applied Economics Association.
Soltani, A. (2009). Crop Production Ecology. Department of Agronomy (Course notes) Gorgan University of Agricultural Science and Natural Resources. (in Persian)
Soltani, A. (2007). Application of SAS in statistical analysis. Mashhad Jahad Daneshgahi Press, Mashhad, Iran. (in Persian)
Yarnia, M. & Piroozkhah, S. (2011). Effect of potassium levels on tolerance to drought stress in rapeseed. Regional Eco physiological conference of crops, Shoushtar, Islamic Azad University, Shoushtar Branch. https://www.civilica.com/Paper-SHOUSHTARECO01-SHOUSHTARECO01_050.html. (in Persian)
Zare, M., Bazrafshan F. & Mostafavi, K. (2012). Competition of rapeseed (Brassica napus L.) cultivars with weeds. African Journal of Biotechnology, 11(16), 1378-1385. http://dx.doi.org/10.5897/AJB11.1909AJOL African Journals Online.