寒露风防灾减灾技术措施（Cold dew wind disaster prevention and mitigation measures）（寒露风防灾减灾技术措施（寒露风灾害预防和减灾措施））.docVIP

寒露风防灾减灾技术措施（Cold dew wind disaster prevention and mitigation measures）（寒露风防灾减灾技术措施（寒露风灾害预防和减灾措施）） Cold dew wind disaster prevention and mitigation measures At present, our region coincided with the flowering stage of rice, and the beginning of October due to the cooling rate of cold air are relatively large, in my area of rice caused a very negative impact, according to meteorological department statistics, the affected area up to 63 of the county. Therefore, make good work of cold dew wind disaster prevention and reduction of major significance. 1, what is the cold dew wind: cold dew wind is the autumn cold air after cooling the chilling injury caused a significant reduction of rice output. In Chinese south, which occurred in the free solar term, named cold dew wind. The influence of low temperature Rice Flowering, pollination, fertilization and the grouting process is normal, resulting in rice grain rate increased, rice light tilt, commonly known as Alice ear head, cold dew wind on meteorological hazard index of rice with rice variety and different developmental stages. The meteorological indexes of cold dew wind: A) temperature indicators: temperature index of rice heading flowering harm, more than 3 consecutive days, the average temperature is below 20 DEG Japonica Hybrid Rice for 3 days, the average temperature is below 23 DEG C, Conventional Indica Rice varied with different varieties, generally between Japonica Rice and hybrid rice, hybrid rice or the like. B) weather type: there are roughly two kinds of weather: one is low temperature and rainy weather, the other is temperature cool type. A cold weather is sunny, the air is dry, with 3 - 4 or more northerly winds for dry type. C) harm: rice heading, flowering and fruiting has been greatly affected, resulting in decreased seed setting rate, to generate a large number of shell, blighted grain, light weight production, no charge. 2, prevention measures: Cold Dew wind associated with cold air activity, when the