甘肃河东地区小麦条锈病菌(Puccinia striiformis f.sp.tritici)越冬气候区划  

Climatic Zoning of Puccinia striiformis f. sp. tritici Overwintering in Hedong of Gansu

作　　者：万信 许彦平[2] 韩兰英 姚晓红[2] 贾建英 Wan Xin;Xu Yanping;Han Lanying;Yao Xiaohong;Jia Jianying(Lanzhou Regional Climate Center,Lanzhou 730020;Tianshui Meteorological Bureau,Tianshui Gansu 741018)

机构地区：[1]兰州区域气候中心,兰州730020 [2]甘肃省天水市气象局,甘肃天水741018

出　　处：《中国农学通报》2021年第22期111-115,共5页Chinese Agricultural Science Bulletin

基　　金：公益性行业(气象)科研专项“小麦条锈病发病的气象成因及气象指标研究”(GYHY201406036);国家自然科学基金“西北典型雨养农业区冬小麦干旱致灾阈值及风险影响机制研究”(41605090)。

摘　　要：以冬季最冷时段7天日平均气温为主要指标,降水量为辅助指标,采用GIS技术进行小麦条锈病精细化越冬气候区划。陇南南部、陇南北部、渭河流域与关山地带、陇东黄土高原南部、庆阳市北部和陇中南部6个主要越冬区7天多年平均气温分别为0.6、-4.1、-6.5、-8.3、-9.0、-9.8℃,普遍出现在1月上、中旬,不可越冬海拔高度下限分别为2500、2000、1800、1600、1200、1800 m,与20世纪80年代相比,陇东和陇南大部地方上升了200400 m,且向西向北扩展到了陇中南部海拔1800 m以下和庆阳市北部1200 m以下地带。易越冬区主要分布在陇南南部和甘南州东部的白龙江流域2100 m、陇南北部1600 m和天水市渭河流域1400 m以下地带。可越冬区介于易越冬和不可越冬之间,以陇东黄土高原南部面积最大,庆阳市北部和陇中南部最少。Taking the 7 d daily average temperature during the coldest period of winter as the main indicator and precipitation as the auxiliary indicator, the revised Puccinia striiformis f. sp. tritici overwintering meteorological index and geographic information system(GIS) were used to carry out overwintering climatic zoning of wheat area in eastern Gansu Province. The 6 main overwintering areas were southern Longnan,northern Longnan, Weihe River basin and Guanshan area, southern Longdong Loess Plateau, northern Qingyang City and southern Longzhong. The 7 d average temperature during the coldest winter period of 6 main overwintering areas was 0.6,-4.1,-6.5,-8.3,-9.0 and-9.8℃, respectively, which generally occur in the first and second ten-days period of January, and the lower limit of the altitude that could not be overwintered was respectively 2500, 2000, 1800, 1600, 1200 and 1800 m. Compared with the 1980 s, the upper limit of the altitude rose 200-400 m in Longdong and most of Longnan, and extended west and north to the southern Longzhong below 1800 m and the northern Qingyang City below 1200 m. The easy overwintering areas were mainly distributed in the Bailong River basin below 2100 m in southern Longnan and eastern Gannan Prefecture, 1600 m in northern Longnan and 1400 m in Weihe River of Tianshui City. The overwintering area was between easy overwintering and non-overwintering, the largest area was the southern Longdong Loess Plateau, and the least areas were northern Qingyang City and southern Longzhong.

关 键 词：甘肃 河东 条锈病菌 越冬 精细化 气候区划 

分 类 号：S165.28[农业科学—农业气象学]