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Determination of soybean yield gap and potential production in Iran using modeling approach and GIS

Journal of Integrative Agriculture 2021年第2期20卷 395-407页

作者： Alireza NEHBANDANI Afshin SOLTANI Ali RAHEMI-KARIZAKI Amir DADRASI Faranak NOURBAKHSH Department of Plant production Gorgan University of Agricultural Sciences and Natural ResourcesGorgan ***Iran Department of Plant production Gonbad Kavoos UniversityGonbad Kavoos ***Iran Department of Agronomy Agricultural ScienceVali-e-Asr University of RafsanjanKerman ***Iran SWEP Analytical Laboratories MelbourneVictoria 3173Australia

Increasing crop production is necessary to maintain food security for the growing global *** the gap between actual and potential yield is one of the important ways to increase yield per unit *** yield and the yield gap of soybean were determined for Golestan Province,Iran,using Soybean Simulation Model (SSM-i Crop2) and Geographical Information System (GIS).Information from 24 weather stations and soil data of the region were *** gap and production gap were calculated at county and province *** average actual yield of soybean in this province was2.28 t ha^(–1) while the province’s potential yield was 4.73 t ha^(–1),so the yield gap was estimated 2.44 t ha^(–1).Thus,there is a great potential for increasing soybean yield in Golestan,which is possible through improving crop management of soybean in farmers’*** average water productivity of soybean was estimated to be 0.81 kg m^(–3).Spatial distribution of water productivity in soybean farms showed that the highest and the lowest water productivities (0.99 and 0.44 kg m^(–3)) were in western and eastern regions of the province,respectively,in accordance to vapour pressure *** was concluded that soybean production in the province could increase by 66%(from 109 970 to 182 170 tons) if 80% of the current yield gap could be removed.

关键词： crop area oilseed production gap soybean yield gap

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