1980年以来晋北黄花菜气候适宜性评价

Climate Suitability Evaluation of Daylily in Northern Shanxi since 1980

利用山西省大同市云州区4个区域站2019—2021年逐日气象资料及黄花菜品质资料,通过相关性分析、回归分析、聚类分析以及专家打分法得到了影响黄花菜品质的关键生育阶段关键气候因子及其对应的阈值,基于GIS技术将各要素网格推算分析得出了晋北黄花菜关键气候要素的年代际变化特征,并对晋北黄花菜进行了气候适宜性评价。结果表明:影响黄花菜品质的关键气候因子为全生育期降水量、抽薹—收获期大于5℃有效积温、苗期平均最低气温、收获期平均最高气温、收获期日较差等因素;1980—2010各年代际晋北黄花菜适宜区范围的变化特征为扩大—缩小—扩大,主要位于大同市中南部、朔州东部、忻州西部、中南部地区。研究结果可为晋北地区充分利用气候资源实现黄花菜的高质高产提供参考。

Based on daily meteorological data and quality data of daylily in 4 regional meteorological observation stations in Yunzhou District,Datong City,Shanxi Province from 2019 to 2021,key climate indicators and thresholds of daylily were calculated through correlation analysis,regression analysis,cluster analysis and expert scoring method.According to the grid calculation and GIS technology,the interdecadal variation characteristics of key climatic factors of daylily were analyzed,and the climate suitability assessment and evaluation of daylily were carried out.The results showed that average minimum temperature at seedling stage,effective accumulated temperature greater than 5℃at bolting to harvest period,average maximum temperature at harvest period,daily range of temperature at harvest period and precipitation during the whole growth period were the key climatic factors affecting the quality of daylily.The climate suitable areas for daylily were enlarged,reduced and enlarged in turn in Northern Shanxi from 1980s to 2010s,which mainly located in the central and southern part of Datong,eastern Shuozhou,and western,central and southern part of Xinzhou.The results are conducive to promoting the utilization of climate resources to achieve high quality and high yield of daylily in North Shanxi.