大豆锈病越冬区气候区划研究

根据1951-2001年间全国743个气象站点的气象数据,结合大豆锈病越冬所需气候条件,采用地理信息系统分析获得了大豆锈病在我国越冬区区划图,以供我国各个地区统一协调管理大豆锈病时参考使用.根据生物气候相似距原理,以琼海为中心,以计算的前一年12月初到下一年2月底的时间段内各个旬均温、月最高温、月最低温、旬降雨量为气候要素,计算琼海与其余742个气象站点的气候相似距,用地理信息系统软件Arcmap对相似距值按Kriging法进行插值,生成的地图表明,大豆锈病可在海南岛、广东南部较大范围内越冬,而云南和广西只有局部地区适合大豆锈病越冬.该区划结果需要进一步实地调查验证.

Climatic analysis to define the over-wintering region of soybean rust in China

Soybean rust(Phakopsora pachyrhizi Sydow) has been found in 23 provinces in China,and is frequently a destructive disease in southern China.To delineate the over-wintering area of soybean rust,data sets from 743 climatic stations in China during 1951-2001 were analyzed using geographical information system(GIS) software.A climatic map of the over-wintering area of soybean rust in China was made,which will be beneficial in managing the disease.Analogical distance was calculated using average temperature and average rainfall during ten-day periods,and maximum and minimum monthly temperature between Qionghai and the other 742 climatic stations during 12-2~(nd) month.The GIS software Arcmap completed the map,using Kriging methods for interpolation between stations.The result showed that soybean rust can overwinter in nearly all of Hainan island,in southern portions of Guangdong Province,and in local areas of Guangxi and Yunnan Provinces.As yet,the modeling results need to be confirmed by visual evidence of overwintering of soybean rust in these areas.