摘要
应用种群空间动态分析原理,根据田间调查数据,按泊松分布、奈曼分布和负二项分布模型,统计检验频次适合度;用聚集度指标判断聚集程度;确定蚕豆枯萎病病株田间分布呈聚集分布。聚集原因为环境因素或环境与病菌综合作用所致。田间调查抽样采用模拟比较和计算理论抽样数方法,初步认为蚕豆枯萎病田间调查宜用平行线取样法,取样点至少应有30个样点,取300个植株。
The analysis principle of population spatial trends was applied in this study. According to the field survey data. the frequency fitness was tested statistically with Poission Neyman and binomial distribution models and the clumped intensity was decide by aggregated index. The spatial distribution of the blight infected plants was determined as the clumped one, which was caused by the environmental factors or the comprehensive effects between environment and the pathogen. Through comparing sampling methods of the field survey and calculating theoretical sampling number. the parelled sampling method was thought the suitable one for broad bean blight. The sampling spots should not be less than 30 and the sampling numbers should not be less than 300 plants.
出处
《云南农业大学学报》
CAS
CSCD
2003年第4期343-345,381,共4页
Journal of Yunnan Agricultural University
基金
云南省应用基础研究基金资助项目(99C0052M)
