| 馬尾松毛虫越冬幼虫空間分布型及其抽样技术 |
| |
| 引用本文： | 杨春材.馬尾松毛虫越冬幼虫空間分布型及其抽样技术[J].安徽农业大学学报,1988(4). |
| |
| 作者姓名： | 杨春材 |
| |
| 作者单位： | 安徽农学院林学系 |
| |
| 摘 要： | 马尾松毛虫越冬幼虫空间分布型是属负二项分布,其分布基本成分是疏松的个体群。采用Iwao法测定聚集度和资料代换为佳,越冬期虫情调查以对角线法抽样精度较高,并可通过调查树干0～2米或树冠第一轮虫口,建立回归式推算全树虫口密度。
|
| 关 键 词： | 马尾松毛虫 分布型 抽样 |
SPATIAL DISTRIBUTION AND SAMPLING TECHNIQUES OF THE OVERWINTERING MASSON'S PINE CATERPILLAR LARVAE |
| |
| Yang Chuncai.SPATIAL DISTRIBUTION AND SAMPLING TECHNIQUES OF THE OVERWINTERING MASSON'S PINE CATERPILLAR LARVAE[J].Journal of Anhui Agricultural University,1988(4). |
| |
| Authors: | Yang Chuncai |
| |
| Institution: | Department of Forestry |
| |
| Abstract: | The spatial distribution pattern of the overwintering larvae of the Masson's pine caterpillar is a negative binomial one and Iwao's test is the best for the aggregation analysis and datum transformation. In diagonal sampling, which gives comparably higher precision, larval numbers at o-2m in height of trunks and on the first whirl from the ground are counted to set regression equation for the estimate of larval number all over a tree. |
| |
| Keywords: | |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《安徽农业大学学报》浏览原始摘要信息 |
| 点击此处可从《安徽农业大学学报》下载免费的PDF全文 |
