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木毒蛾卵块林间分布研究

发表时间:2018-08-15  浏览量:168  下载量:48
全部作者: 张继锋,左城,王荣,梁光红,王保德,张飞萍
作者单位: 福建农林大学林学院;美国农业部动植物健康检疫中心Otis实验室
摘 要: 木毒蛾(Lymantria xylina)是我国东南沿海木麻黄(Casuarina equisetifolia)防护林的主要害虫。为探明木毒蛾卵块在木麻黄林间的分布特征,通过野外系统调查和地统计学分析方法,研究不同受害程度木麻黄林中木毒蛾卵块的垂直分布和水平分布特征。结果表明,在福建平潭木麻黄林分中,木毒蛾主要在木麻黄侧枝上产卵(卵块数占比97.03%),但也有少量卵块产在木麻黄主干和其他植被上(卵块数占比2.97%);卵块在木麻黄上的垂直分布范围为离地表40~640 cm 处,主要集中在200~400 cm 范围内(卵块数占比60.8%);卵块的水平分布类型为聚集分布,主要聚集在背海一侧的林地内,具有较强的空间聚集性和明显的聚集中心,受害较重林分卵块的聚集程度比受害较轻林分更为明显,但都是从聚集中心株以环状向整个林地扩散。除木麻黄外,还在林间11科12种其他植物和铁丝网、电线上发现木毒蛾卵块。
关 键 词: 森林保护学;木毒蛾;卵块;空间分布;地统计学;木麻黄
Title: Studies on the distribution of Lymantria xylina egg masses in field
Author: ZHANG Jifeng, ZUO Cheng, WANG Rong, LIANG Guanghong, WANG Baode, ZHANG Feiping
Organization: College of Forestry, Fujian Agriculture and Forestry University; Otis Laboratory, USDA Animal and Plant Health Inspection Service
Abstract: Lymantria xylina is the main pest of Casuarina equisetifolia shelterforest in the southeast coastal areas of China. In order to explore the distribution characteristics of L. xylina egg masses in C. equisetifolia forest, the vertical and horizontal distribution patterns of L. xylina egg masses in C. equisetifolia forest stands with different damage degrees were evaluated by field surveys and geostatistical analysis method. The results showed that, in C. equisetifolia forest in Pingtan of Fujian, most L. xylina egg masses (97.03%) were laid on the branches of C. equisetifolia, and just a small percentage of egg masses (2.97%) were found on the trunk of C. equisetifolia and other species of plants. The egg masses distributed in the vertical range during 40-640 cm from the ground surface, and most (60.8%) were found within the range of 200-400 cm. The horizontal distribution of the egg masses was clustered distribution type, and mainly aggregated in the forests further away from the sea. The egg masses had a strong spatial aggregation and an obvious aggregated center. And the aggregation degree was more obvious in the forests with high-density L. xylina population than that in the forests with low-density L. xylina population. However, all of the egg masses spread from the cluster center to the entire forest annularly. In addition to C. equisetifolia, egg masses were also found on other plants of 12 species in 11 families and wire netting, eletric wire in the field.
Key words: forest protection; Lymantria xylina; egg mass; spatial distribution; geostatistics; Casuarina equisetifolia
发表期数: 2018年8月第15期
引用格式: 张继锋,左城,王荣,等. 木毒蛾卵块林间分布研究[J]. 中国科技论文在线精品论文,2018,11(15):1543-1551.
 
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