田间消长
Growth and decline in the field
dynamics in field
田间消长规律
Law of field growth and decline
field population dynamic
昆虫种群数量
the quantity of insects’ population
种群数量变动
population dynamics
population change
differentiation in population fluctuation
种群数量变化
the fluctuation of the population number
种群数量动态
population dynamics
population quantity dynamics
population quantitative dynamics
种群数量监测
population quantity surveillance
种群数量控制
Control quantity of species
种群数量特征
Population quantitative characteristics
种群数量统计分析
quantity statistics analysis for plant population
种群消长指数
population fluctuation index