海南两系杂交稻制种关键发育期气候风险区划

为了对海南两系杂交稻制种关键发育期进行精细化气候风险区划，对海南两系杂交稻制种产业区域布局提供指导，利用2006—2020年海南岛南部8个市县144个区域气象站的资料，在数据质量控制的基础上，根据两系杂交稻制种的气候风险等级指标，制定海南岛两系杂交稻制种关键发育期气候风险区划。结果表明，不育临界温度22℃时，两系杂交稻制种综合气候低风险区分布于昌江、东方、乐东、三亚、保亭、陵水和万宁；不育临界温度23℃时，两系杂交稻制种综合气候低风险区分布于东方、乐东、三亚、保亭和陵水大部分地区；不育临界温度23.5℃时，两系杂交稻制种综合气候低风险区分布于乐东、三亚和陵水大部分地区；不育临界温度24℃时，两系杂交稻制种综合气候低风险区分布于乐东、三亚和陵水沿海地区。所构建的气候风险区划可为海南两系杂交稻制种种植规划提供有效借鉴，对南繁扩种具有一定的指导意义。

Climate risk zoning of two-line hybrid rice seed production at key growth stages in Hainan

In order to clarify the climate risk of two-line hybrid rice seed production in Hainan, climate risk zoning of two-line hybrid rice seed production in the key growth stages was conducted in Hainan based on the data of regional automatic meteorological observation stations with high resolution in order to provide a more scientific and reasonable reference for the promotion of two-line hybrid rice seed production in Hainan. The data of 144 regional meteorological stations in 8 cities and counties in the south of Hainan Island collected from 2006 to 2020 were used with data quality control to draw a climate risk zoning map of two-line hybrid rice seed production in the key growth stages in Hainan based on the climate risk level index of two-line hybrid rice seed production by using the spatial analysis method of geographic information system. The zoning showed that the low-risk areas of comprehensive climate for seed production of two-line hybrid rice were distributed in Changjiang, Dongfang, Ledong, Sanya, Baoting, Lingshui and Wanning when the critical sterility temperature was 22 ℃, in most areas of Dongfang, Ledong, Sanya, Baoting and Lingshui at 23 ℃, in Ledong, Sanya and most areas of Lingshui at 23.5 ℃, and in Ledong, Sanya and Lingshui coastal areas at 24 ℃. This climatic risk zoning method can provide an effective reference for the planting planning of two-line hybrid rice in Hainan, and the zoning results have important guiding significance in expansion of propagation and breeding in the south of China in winter.