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利用统计上的交叉谱分析法,对影响江苏省通州市的稻纵卷叶螟数量的气象因子进行了分析.结果表明,1、5月份的气象因子是制约该地区迁入虫量的关键因子;而7月份的气象因子只是对迁入虫量的数量波动有影响,但不能影响迁入虫量的基数.同时对虫情因子间的关系进行了分析,发现这些因子间的关系是很密切的,因而在预测模型中要考虑到它们之间的这种关系.
The meteorological factors influencing the number of rice leaf roller of Tongzhou in Jiangsu Province were analyzed by means of statistical cross-spectrum analysis.The results showed that the meteorological factors of January and May were the key factors restricting the quantity of insects moving in this area While the meteorological factors in July only affected the quantity fluctuation of migratory insects but did not affect the cardinal number of migratory insects.At the same time we analyzed the relationship between insect factors and found that the relationship between these factors is very close Therefore, the relationship between them should be considered in the prediction model.