سمانه رهبان - دانشجوی دکتری، گروه زراعت، دانشگاه علوم کشاورزی و منابع طبیعی گرگان، گرگان، ایران.
بنیامین ترابی - دانشیار، گروه زراعت، دانشگاه علوم کشاورزی و منابع طبیعی گرگان، گرگان، ایران.
افشین سلطانی - استاد، گروه زراعت، دانشگاه علوم کشاورزی و منابع طبیعی گرگان، گرگان، ایران.
ابراهیم زینلی - دانشیار، گروه زراعت، دانشگاه علوم کشاورزی و منابع طبیعی گرگان، گرگان، ایران.

The present study tries to estimate the yield gap of irrigated canola in Iran as the first step for planning sustainable improvement of production. It has been performed in the modeling laboratory of Gorgan University of Agricultural Sciences and Natural Resources in ۲۰۱۷-۲۰۱۹. The protocol provided by the GYGA project is used for detection of climatic zones as well as major weather stations in canola production regions to estimate the yield gap. The actual yield of the irrigated canola in its major production regions is between ۱۱۸۴ to ۲۳۵۸ kg ha-۱. The range of potential yield is estimated between and ۳۸۲۳ and ۶۵۲۰ kg ha-۱. The highest potential yields belongs to Hamedan and Lorestan provinces and the lowest value to Khuzestan Plain. The range of the yield gap in its major production regions in the country is ۲۴۸۰ to ۴۳۶۵ kg ha-۱, i.e. ۵۳% to ۷۷% of gap and with an average, ۳۲۷۶ kg ha-۱ equal to ۶۵% of the gap. With respect to the exploitable yield as the target yield, the exploitable yield is between ۱۵۴۴ and ۳۲۰۸ kg ha-۱, with an average of ۲۲۶۱ kg ha-۱. The magnitude of this gap indicates that the potentials of canola production in Iran are not exploited properly. Analyzing the reasons and methods of amendment the present yield gap and adoption of efficient management methods to achieve higher yields is crucial with regard to food security and economic.

پروتکل گیگا, عملکرد واقعی, عملکرد پتانسیل, مناطق اقلیمی, مدل شبیه &rlm؛ سازی