In order to find out the climate change law for Yuxian＇s tobaccos, and provide a theoretical basis for the rational use of climate resources in.the growing area, the meteorological element variation affecting tobacco...In order to find out the climate change law for Yuxian＇s tobaccos, and provide a theoretical basis for the rational use of climate resources in.the growing area, the meteorological element variation affecting tobacco growth was analyzed by using unary linear regression equation and other statistical analysis methods based on the observation data of Yuxian Weather Station during 1967-2013. The results showed that the average temperature during the growing period of tobacco in the 47 years period was in the normal growth range of tobacco, close to the lowest value of the optimum temperature. Since 1990, there were only 2 years having the accumulated temperature of days with ≥10 ℃ accumulated temperature less than the required accumulated temperature （2 600 ℃.d ） for tobacco growth. The aver- age of frost-free days of flue-cured tobacco in Yuxian in 47 years was 18.7 d more than the required days for the normal growth and maturation of tobaccos. The av- erage of precipitation during the growing period over the years was much lower than the required value for the normal growth of tobaccos. The sunshine hours for Yuxian＇s flue-cured tobacco in the field could meet the requirements for growing high-quality tobaccos. The sunshine hours in harvest and curing period were a bit more than the required number for growing high quality tobaccos. It was cold in winter and spring in Yuxian, during which the dry climate was not conducive to the occurrence of pests and diseases. However, with the warming climate, the pest dis- eases occurred easily. In order to avoid or mitigate meteorological disasters, it was necessary to rationally select the types and planting areas of tobacco, timely carry out irrigation and artificial rain enhancement and hail suppression, and establish a rational meteorological service system as well as early conduct prediction, notifica- tion and prevention of tobacco disasters.展开更多
文摘In order to find out the climate change law for Yuxian＇s tobaccos, and provide a theoretical basis for the rational use of climate resources in.the growing area, the meteorological element variation affecting tobacco growth was analyzed by using unary linear regression equation and other statistical analysis methods based on the observation data of Yuxian Weather Station during 1967-2013. The results showed that the average temperature during the growing period of tobacco in the 47 years period was in the normal growth range of tobacco, close to the lowest value of the optimum temperature. Since 1990, there were only 2 years having the accumulated temperature of days with ≥10 ℃ accumulated temperature less than the required accumulated temperature （2 600 ℃.d ） for tobacco growth. The aver- age of frost-free days of flue-cured tobacco in Yuxian in 47 years was 18.7 d more than the required days for the normal growth and maturation of tobaccos. The av- erage of precipitation during the growing period over the years was much lower than the required value for the normal growth of tobaccos. The sunshine hours for Yuxian＇s flue-cured tobacco in the field could meet the requirements for growing high-quality tobaccos. The sunshine hours in harvest and curing period were a bit more than the required number for growing high quality tobaccos. It was cold in winter and spring in Yuxian, during which the dry climate was not conducive to the occurrence of pests and diseases. However, with the warming climate, the pest dis- eases occurred easily. In order to avoid or mitigate meteorological disasters, it was necessary to rationally select the types and planting areas of tobacco, timely carry out irrigation and artificial rain enhancement and hail suppression, and establish a rational meteorological service system as well as early conduct prediction, notifica- tion and prevention of tobacco disasters.
