| 摘要: |
| 采用频次分布拟合检验法和聚集指标判定法，分析了芒缺翅蓟马为害小麦穗的空间分布型．结果表明，芒缺翅蓟马为害小麦穗的空间分布型为聚集型的负二项分布、奈曼分布和波松二项分布；聚集均数与害穗的平均密度成线性关系，λ＝－０．４０４２＋１．０１３８m；小麦田中害穗的最大聚块面积为２ｍ2．抽样方法比较得出，采用Ｚ形或大五点取样抽取１０点（×１ｍ2）代表性最好。 |
| 关键词: 芒缺翅蓟马,分布型,小麦,抽样技术 |
| DOI： |
| 分类号:S433.89；S |
| 基金项目:西藏“一江两河”农业区域综合开发项目的部分内容 |
|
| Spatial Distribution Patterns of Harmed Wheat Heads with Aptinothrips stylifer Trybom in Tibet |
|
Dong Yingcai
|
| Abstract: |
| The spatial distribution patterns of harmed wheat heads with
Aptinothrips stylifer Trybom was measured with the methods of χ2, test for frequency
distribution and aggregative index determination.The results showed that its spatial
distribution patterns conformed with aggregative negative binomial,Neyman and Poisson-binomial distributions.The aggregative averges (λ) and averge densities (m) of
harmed wheat heads took linear relation,λ＝0.4042t + 1.0138m.The maximal aggregation area of harmed wheat heads was 2 m2.The result of the comparison among
the sampling methods showed that 10 plots (× 1m2)selected with Z pattern or great
five plots sampling method were the best. |
| Key words: Aptinothrips stylifer,distribution, wheat, sampling method |
