摘要
烟草是我国重要的经济作物,但随着土壤连作年限的增加,烟草青枯病的发生日益严重,成为制约烟草行业持续健康发展的主要因子.针对烟草青枯病发生与高温高湿的环境条件高度吻合这一现象,本文基于对田间烟草青枯病病情指数以及病害期间气象因子的动态监测,引入最大信息系数和皮尔逊相关性系数评估方法,探究了影响烟草青枯病发生的关键气象因子.结果表明,空气湿度是烟草青枯病发生的必要因子,降雨过后,相对较高的空气温度是促进烟草青枯病发生发展的关键气象因子.当15 d平均湿度维持在87.74%以上、15 d最低温度维持在13.00℃以上、15 d平均温度维持在19.00℃以上时,田间烟草青枯病开始发生;当15 d最低温度升高(达到14.83℃以上)时,田间烟草青枯病开始流行;但当日平均温度低于18℃时,病害发生发展速度有所减缓.该结果为今后田间烟草青枯病的预测预报以及病害的及时防控提供了理论支持,在生产上具有一定的价值和意义.
Tobacco is an important cash crop in China,but tobacco bacterial wilt is becoming more and more serious,which has become a major factor restricting the sustainable and healthy development of tobacco industry.Taking into consideration the fact that the occurrence of tobacco bacterial wilt is highly coincident with a high temperature and humidity environment and based on the data of dynamic monitoring of the disease index of tobacco bacterial wilt in the field and the meteorological factors during disease outbreak,the authors of this paper used the maximum information coefficient and Pearson correlation coefficient to explore the key meteorological factors influencing tobacco bacterial wilt in the fields,so as to provide a theoretical support to the forecast and control of this disease.The results showed that air humidity was a necessary factor for the occurrence of tobacco bacterial wilt,and a relatively high air temperature was a key meteorological factor to promote the outbreak of this plant disease.When the average humidity of 15 d remained above 87.74%,the minimum temperature of 15 d was over 13.00℃and the average temperature of 15 d was over 19.00℃,tobacco bacterial wilt began to occur;when the minimum temperature of 15 d rose to 14.83℃or more,tobacco bacterial wilt broke out,but when the average day temperature was below 18℃,the occurrence of the disease declined.
作者
陈代明
江其朋
张世渠
廖帮红
龚杰
谭茜
秦平伟
CHEN Dai-ming;JIANG Qi-peng;ZHANG Shi-qu;LIAO Bang-hong;GONG Jie;TAN Xi;QIN Ping-wei(Pengshui Branch of Chongqing Tobacco Company,Pengshui Chongqing 400715,China;School of Plant Protection,Southwest University,Chongqing 400715,China;Chongqing Institute of Tobacco Science,Chongqing 400715,China)
出处
《植物医生》
2020年第1期39-44,共6页
Plant Doctor
关键词
空气温湿度
烟草青枯病
相关性分析
最大信息系数
air temperature and humility
tobacco bacterial wilt
correlation analysis
maximal information coefficient(MIC)
作者简介
陈代明(1968-),男,硕士,主要从事烟草生产管理工作.E-mail:975003544@qq.com。
