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一、对“S曲线”的几个关键点和关键区段认识不到位易错分析对种群“S”型增长曲线(如图1)几个关键点和关键区段的认识没有达到以下程度.(1)潜伏期(对环境的适应期):个体数量很少,增长速率很慢,害虫防治最好应在此期进行.(2)加速期(对数期):个体数量快速增加,K/2时,增长速率达到最高,资源利用黄金点,害虫防治严防达此期.(3)减速期和饱和期:随着种群密度增加,个体因食物、空间和其他生活条件的斗争加剧,同时天敌数量也增加,种群增长速率下降.当数量达到环境条
First, the “S curve” of several key points and key sections do not know a bit error-prone analysis of the population “S ” type growth curve (Figure 1) several key points and key section of understanding (1) Incubation period (adaptation period to the environment): small number of individuals, slow growth rate, pest control should preferably be carried out in this period. (2) Acceleration period (logarithmic period): The number of individuals is fast Increase, K / 2, the highest growth rate, the use of gold resources, prevention and control of pests prevent this period. (3) deceleration and saturation period: as the population density increases, the individual food, space and other living conditions struggle Intensified, while the number of natural enemies also increased, population growth rate decreased when the number reached the environmental bar