影响小菜蛾种群数量的非生物因子的灰色系统分析

Grey System Analysis of Abiological Factor Influencing Plutella xylostella Population

应用灰色系统关联度分析方法,对1991～1995年的5年间影响小菜蛾成虫田间种群数量的非生物因子进行分析。结果表明,影响小菜蛾成虫田间种群数量的非生物因子在季节间,主要是月平均温度,其次是最高温和最低温,再次是田间相对湿度和降雨量;而在年度间,主要是年均最低温,其次是年度平均温和年均最高温,再次是年均降雨量和年平均相对湿度。

Using the method of relational grade of grey system, the abiological factor influencing Plutella xylostella population from 1991 to 1995 were analyzed. The results showed that first abiological factor which influencing Plutella xylostella population was the average temperature of each month, the second was the highest and lowest temperature, and the third was the relative humidity and the rainfall between the seasons. But also the main abiological factor which influencing Plutella xylostella population between the different years were the lowest temperature, the second was the average temperature and the highest temperature, the third was the rainfall and the relative humidity.