Spacial pattern and sampling technique of laspeyresia splendana larvae in castanea mouissima orchards | 栗实蛾幼虫空间格局及抽样技术研究
2010
Chen Bingxu, Guangdong Academy of Agricultural Sciences, Guangzhou(China), Plant Protection Research Institute | Dong Yizhi, Guangdong Academy of Agricultural Sciences, Guangzhou(China), Plant Protection Research Institute | Liang Guangwen, South China Agricultural University, Guangzhou(China)
صينى. 对7个板栗园栗实蛾幼虫空间格局进行了研究．结果表明，栗实蛾幼虫在板栗园中的分布是遵循负二项分布的聚集分布，其中Iwao的m. _m回归模型为m. _3．5323＋1．0710m，Taylor幂模型为Igv=0．5913＋1．1304lgm．对各聚集度指标的分析结果显示：在板栗园中的栗实蛾幼虫彼此之间互相吸引，分布的基本成分是个体群，个体群为聚集分布，且在任何密度下都是聚集的，聚集强度随着密度的升高而增大．导致栗实蛾幼虫在板栗园中呈聚集分布的原因是由该虫本身的习性和环境共同造成的．栗实蛾幼虫虫口密度调查的最适理论抽样数公式为n=t2／D2f4，5323／m＋0．071O）．[著者文摘]
اظهر المزيد [+] اقل [-]إنجليزي. The spatial distribution patterns of Laspeyresia splendana larvae in different Castanea moUissima orchards were surveyed and analysized. The results showed that the larvae were in aggregation distribution fit for negative binomial pattern. Its Iwao＇s m. _-m model was m ＊ = 3. 532 3 ＋ 1. 071 0 m, and Tailor＇s power model lgv =0. 591 3 ＋ 1. 130 4 lgm. By analysing the aggregation index, the larva was attractive by each other in chestnut orchards and its basic component of distribution was colony which were in aggrega- tion distribution even at low population density and more aggressive with population density increase. The aggreggation distribution of the larvae was due to its life habit and environmental factors. In addition, the optimum theoretical sampling number of the larvae could be obtain from the formula n = t2/D2 （ 3.532 3/ m ＋ 1.071 0）.[著者文摘]
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