全国晚稻稻飞虱抽样调查虫口密度PD分析数据

在对全国晚稻稻飞虱进行抽样调查后产生的数据，需要进行虫口密度的分析，以此来判断区域虫害发生情况，对于国家粮食安全起到重要作用。以全国晚稻系统田稻飞虱进行抽样调查后产生的稻飞虱每块田块的总量数据为基础，再与以关键系数β（β=2000）相乘，通过α算法可以得出虫口密度PD值，进而起到对各区域晚稻稻飞虱虫口密度的监测作用，为国家粮食安全支撑重要保障。This dataset is generated from sampling surveys targeting rice planthoppers in late rice fields across the country. Population density analysis is performed to assess regional pest infestation status, which plays a critical role in safeguarding national food security. Specifically, based on the total count of rice planthoppers per plot collected from national standardized late rice monitoring fields, the population density PD value can be calculated by first multiplying the plot-wise total counts with the key coefficient β (β=2000), then applying the α algorithm. This method enables monitoring of rice planthopper population densities in late rice fields across different regions, providing vital support for national food security.