Using the climatic data, such as extreme minimum temperature and relative humidity, in 15 bases in the main planting area of Guizhou Red Heart Kiwifruit from December 1st to next April 30th, respectively, from 2010 to...Using the climatic data, such as extreme minimum temperature and relative humidity, in 15 bases in the main planting area of Guizhou Red Heart Kiwifruit from December 1st to next April 30th, respectively, from 2010 to 2018, combined with the monitoring of red heart kiwifruit ulcer disease, we analyze the occurrence and prevalence of meteorological factors and dynamic characteristics of the red heart kiwifruit ulcer disease in Guizhou, China. The results showed that the main period of occurrence and prevalence of red heart kiwifruit ulcer was from March to April. In winter, when the daily average temperature of 5 d and above is ≤2°C, the daily extreme minimum temperature is ≤−2°C, and the daily average relative humidity is ≥75%, it is beneficial for the ulcer pathogen to lurk and propagate in the plant. It is suggested that this meteorological condition should be used as an early warning indicator for the prevention of ulcer disease of red heart kiwifruit, in order to actively organize prevention after the emergence of early warning indicators to improve the prevention and treatment effect. In spring, the average daily temperature of 5 d and above is ≤18°C, and the daily average relative humidity is ≥80%, which is easy to induce ulcer disease. It can be seen that the first is the winter climatic conditions to meet the breeding of ulcer disease, and then the spring climatic conditions must also meet the rapid propagation of ulcer disease, ulcer disease can occur, develop and popularize. It is of great practical significance to carry out experiments on the relationship between the occurrence of ulcer disease in Guizhou red heart kiwifruit and meteorological conditions.展开更多
利用黔东南州气象资料、三穗C波段多普勒天气雷达资料及FNL再分析资料对2016年4月3日发生在贵州省黔东南州的一次大范围弱冰雹天气过程进行诊断分析。结果表明:此次冰雹过程环流形势是典型的"前倾槽"结构,辐合线和冷锋共同触...利用黔东南州气象资料、三穗C波段多普勒天气雷达资料及FNL再分析资料对2016年4月3日发生在贵州省黔东南州的一次大范围弱冰雹天气过程进行诊断分析。结果表明:此次冰雹过程环流形势是典型的"前倾槽"结构,辐合线和冷锋共同触发了不稳定能量的释放,降雹前地面气温较高,冰雹在下降过程中融化较快,使黔东南州大范围性降弱雹;对流发生前垂直风切变较大,SI、K指数满足强雷暴条件,0℃层和-20℃层高度适宜,但CAPE值能量有限,不利于大冰雹的形成;对流发生时低空维持高湿状态,切变线两侧风速风向的辐合为对流的发生提供了充足的动力条件;雷达资料显示冰雹发生时,在0℃等温线高度上有50 d Bz以上的反射率因子结构,低层辐合、高层辐散,风随高度的变化是中低层顺转,高层逆转,这种上冷下暖的结构有助于空气层结的不稳定,利于对流的发生。展开更多
文摘Using the climatic data, such as extreme minimum temperature and relative humidity, in 15 bases in the main planting area of Guizhou Red Heart Kiwifruit from December 1st to next April 30th, respectively, from 2010 to 2018, combined with the monitoring of red heart kiwifruit ulcer disease, we analyze the occurrence and prevalence of meteorological factors and dynamic characteristics of the red heart kiwifruit ulcer disease in Guizhou, China. The results showed that the main period of occurrence and prevalence of red heart kiwifruit ulcer was from March to April. In winter, when the daily average temperature of 5 d and above is ≤2°C, the daily extreme minimum temperature is ≤−2°C, and the daily average relative humidity is ≥75%, it is beneficial for the ulcer pathogen to lurk and propagate in the plant. It is suggested that this meteorological condition should be used as an early warning indicator for the prevention of ulcer disease of red heart kiwifruit, in order to actively organize prevention after the emergence of early warning indicators to improve the prevention and treatment effect. In spring, the average daily temperature of 5 d and above is ≤18°C, and the daily average relative humidity is ≥80%, which is easy to induce ulcer disease. It can be seen that the first is the winter climatic conditions to meet the breeding of ulcer disease, and then the spring climatic conditions must also meet the rapid propagation of ulcer disease, ulcer disease can occur, develop and popularize. It is of great practical significance to carry out experiments on the relationship between the occurrence of ulcer disease in Guizhou red heart kiwifruit and meteorological conditions.
文摘利用黔东南州气象资料、三穗C波段多普勒天气雷达资料及FNL再分析资料对2016年4月3日发生在贵州省黔东南州的一次大范围弱冰雹天气过程进行诊断分析。结果表明:此次冰雹过程环流形势是典型的"前倾槽"结构,辐合线和冷锋共同触发了不稳定能量的释放,降雹前地面气温较高,冰雹在下降过程中融化较快,使黔东南州大范围性降弱雹;对流发生前垂直风切变较大,SI、K指数满足强雷暴条件,0℃层和-20℃层高度适宜,但CAPE值能量有限,不利于大冰雹的形成;对流发生时低空维持高湿状态,切变线两侧风速风向的辐合为对流的发生提供了充足的动力条件;雷达资料显示冰雹发生时,在0℃等温线高度上有50 d Bz以上的反射率因子结构,低层辐合、高层辐散,风随高度的变化是中低层顺转,高层逆转,这种上冷下暖的结构有助于空气层结的不稳定,利于对流的发生。
