基于生态位模型的地理标志农产品种植适宜性评价研究——以上高县紫皮大蒜为例OA北大核心CSTPCD

[Objective]This study aimed to construct a planting suitability evaluation method for compatible with geographical indication agricultural products,and to make up for the deficiencies in traditional crop planting suitability evaluation method due to the unique growing environment of geographical indication agricultural products,so as to provide important scientific references for optimizing the planting of geographical indication agricultural products.[Method]Taking Shanggao County of Jiangxi Province as the study area,MaxEnt model was used to predict the suitability range and optimal value of each index factor,and niche-fitness model was used to calculate the ecological niche suitability value of each evaluation unit.A comprehensive model of suitability index was established based on ecological niche theory by combining MaxEnt model and niche-fitness model,which was used to analyze the suitability of cultivation of purple-skinned garlic,a geographical indication agricultural product of the study area,from the four aspects of climate,soil,site conditions and cultivation conditions.[Result]The suitable range of each index predicted by MaxEnt model was similar to the current data of purple-skinned garlic planting in Shanggao County,which indicated that the prediction results had high credibility.In addition,the natural breakpoint method was applied to classify the suitability level of each evaluation unit,including four levels:highly suitable,more suitable,barely suitable,and unsuitable areas.Among them,the highly suitable area was 627.03 hm2,centrally located in Taxia Township,Mengshan Township,and Nangang Township;the more suitable area was 1 434.93 hm2,mainly located in Sixi Township,Moshan Township,and Xujiadu Township;the barely suitable area was 1 908.86 hm2,mainly located in the Yeshi Township and the Xinjiebu Township;the unsuitable area was 1 381.43 hm2,mainly located in Luzhou Township,Zhendu Township,Aoshan Township,and Xinjiebu Township.[Conclusion]Tianshan and Jiangnan villages were recommended as seed planting villages,and Magang and Meisha villages were recommended as extension planting villages.The results predicted by the MaxEnt model reduced the subjectivity of the suitability range and optimal value of each indicator in the niche-fitness model,and improved the credibility of the prediction results.The ecological niche model constructed by combining the niche-fitness model and MaxEnt model effectively predicted the suitable planting area of purple-skinned garlic,a geographical indication agricultural product of Shanggao County,and provided a new idea for the study of planting suitability evaluation of geographical indication agricultural products in similar regions.