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Position: Home > Articles > Spring Low Temperature and it's Damage to Rice Seedling in Nanzheng Chinese Agricultural Science Bulletin 2005,21 (3) 300-302

南郑春季低温及对水稻育秧的危害

作  者：
袁应泽;屈振江
单  位：
兰州大学资源环境学院;陕西省气象局
关键词：
春季低温;水稻育秧;危害;南郑
摘  要：
分析了1966—2003年南郑春季(4—5月)低温发生情况,用<12℃的负有效积温和最低气温划分低温对水稻的危害程度。结果表明南郑春季<12℃的低温都发生在4月份,39%年份无危害,21%年份有轻危害,19%年份有中危害,21%年份有重危害。倒春寒发生频率为21%,集中于5月上中旬。<12℃低温属连阴雨型的是晴冷型的2倍,倒春寒年份常伴有连阴雨型低温。分析了低温对水稻育秧的影响,4月中下旬是秧苗受<12℃低温危害的关键时期,5月上中旬是秧苗受倒春寒危害的关键时期。针对不同类型低温,提出了不同预报服务和田间管理措施。
译  名：
Spring Low Temperature and it's Damage to Rice Seedling in Nanzheng
作  者：
Yuan Yingze1,2, Qu Zhenjiang3 (1Environment and Resource Institute of Lanzhou University, Lanzhou 73000;2Nanzheng Meteorological Office, Shanxi Meteorological Bureau 710014; 3Shaanxi Meteorological Bureau, Xi'an 710014)
关键词：
Spring low temperature, Rice seedling, Damage, Nanzheng
摘  要：
Through the analysis of spring(April to May)low temperature occurrence from 1966 to 2003 in Nanzheng, by applying <12℃ negative effective accumulate temperature and minimum temperature to classify damage extent of low temperature to rice seedling. The results show that the occurrence of <12℃ low temperature are all in April, 30% years have no damage, 21% years have light damage,19% years have middle damage,21% years have severe damage. The reverse spring cool occurrence frequency is 20%, center on the first and second decade of May. <12℃ low temperature belong to continuous overcast and rainy type times are as two times as belong to sunshine and cold ones. The reverse spring cool occurrence years are usually accompany with continuous overcast and rainy type low temperature. The impacts of low temperature to rice seedling are analyzed, the results show that the middle and third decade of April are the crucial period of <12℃ low temperature damage, the first and second decade of May are the crucial period of reverse spring cool damage. Aiming at different type of low temperature corresponded forecast-serve and field manage measures are raised.

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