论文部分内容阅读
本文对水稻区鼠类防治指标进行初步研究,结果表明,稻田鼠密度(x)与水稻产量损失率(V)呈直线正相关。经回归分析,二者间数量关系可用模型y=-2.2072+0.9581x±0.5862加以刻画;并根据不同地区的生产水平、产品价格、防治效果、灭鼠费用以及鼠种间生态习性的差异和社会接受能力等因素,建立了防治指标的动态数学模型。根据这一动态模型,结合本地区目前的生产实际,当经济允许损失水平为2％时,水稻成熟期鼠类防治指标为鼠密度4.35％。
In this paper, a preliminary study on the control index of rodents in rice area showed that there was a linear positive correlation between rice density (x) and rice yield loss rate (V). Through regression analysis, the quantitative relationship between the two can be described by the model y = -2.2072 + 0.9581x ± 0.5862. According to the differences in production levels, product prices, prevention and control effects, rodent control expenses and ecological habits among different species, Acceptability and other factors, the establishment of a dynamic mathematical model of prevention and control indicators. According to this dynamic model, combined with the current actual production in the region, when the economic allowable loss level is 2%, the control index of rodents in the mature rice stage is 4.35% of the rat density.