微红梢斑螟蛀孔在马尾松上空间分布研究

Studies on spatial distribution pattern of Dioryctria rubella Hampson wormhole in Pinus massioniana

为弄清微红梢斑螟Dioryctria rubella Hampson在马尾松上的空间分布规律,本文采用设置标准地随机取样的方法对微红梢斑螟蛀孔的空间分布型与抽样技术进行研究。用7种聚集度指标以及Iwao回归法、Taylor幂法则和兰星平的La-m回归法测定分析了微红梢斑螟蛀孔的空间分布型及其内在结构。结果表明,微红梢斑螟蛀孔在马尾松上的空间分布呈聚集分布,其聚集原因是由微红梢斑螟自身生物学习性或环境因素引起的。此外,利用分布型参数确定了微红梢斑螟蛀孔的理论抽样数。

In order to clarify the spatial distribution of Dioryctria rubella Hampson, this paper studied the spatial distribution patterns and sample technique of D. rubella wormhole by adopting random sampling method in sample plots. Seven methods of aggregated indices, Iwao＇s way （regressive relation by m ＊- m）, power law of Taylor and LanXingPing La indicator were used to test the spatial distribution pattern of D. rubella in the Pinus massioniana field. The results showed that the distribution mattern of D. rubella was aggregative, and the social reason of D. rubella is the gathering by its own actions or the circumstances. In addition, the theoretical sampling number was obtained from the parameters of the distribution pattern.