黑线姬鼠种群数量变动因子的主分量分析  

THE PRINCIPLE ANALYSIS FOR DETERMINING THE KEY FACTORS CAUSING POPULATION CHANGE OF APODEMUS AGRARIUS IN SICHUAN BASIN,CHINA

作　　者：蒋光藻[1] 谭向红[1] 倪健英[1] 

机构地区：[1]四川省农业科学院植物保护研究所

出　　处：《植物保护学报》1993年第3期277-282,共6页Journal of Plant Protection

摘　　要：黑线姬鼠的种群数量一年有两个高峰,在四川是春峰高于秋峰。关于影响该鼠数量消长的关键因素经主分量分析和 PCA 排序证明,温度和降水量为第一制约因索,湿度和聚集强度为第二制约因素,种群密度和日照为第三制约因素。四川3月气温回升,少雨,农田郁蔽,早粮面积宽,种群密度小,因此3—6月种群数量呈 J 型指数型增长,至6月达全年最高峰。The Population dynamics of Apodemus agrarius Pallas showed twopeaks per year,with the spring peak higher than the autttrm one inSiehuan Basin,China.The key factors for causing population fluctuationhad been investigated by means of principle component analysis and PCAordination.It indicated that the most important were temperature andprecipitation;humidity,and population aggregation were the next;thethird were population density and duration of day.In March at SichuanBasin,because of temperature raising day by day,with rare rain,andthe farmland covered with more green crops,the population numberincreased rapidly by exponential curve of J-model and reached thehighest peak in June.

关 键 词：黑线姬鼠 种群数量 消长机制 农田 

分 类 号：S443[农业科学—农业昆虫与害虫防治]