摘要
20 0 3年 4～ 6月 ,在黑龙江省大庆市红旗林场对青杨脊虎天牛XylotechusrusticusL .幼虫空间分布格局进行了调查研究 ,结果表明该天牛幼虫在杨树人工林内呈负二项分布 ;采用 6种不同聚集指标测定结果均表明为聚集分布。对青杨脊虎天牛幼虫在树干高度上垂直分布研究表明 ,该天牛幼虫在树干上危害部位主要集中在 1～ 4m范围内 ;对该幼虫垂直分布与树干高度进行曲线拟合 ,符合立方曲线 ,曲线方程为y =0 0 68+0 41 7x -0 1 3 6x2 +0 0 1 1x3 ,由相关系数方值R2 =0 83
The larval spatial distribution pattern of Xylotechus rusticus L. was studied in Daiqing, Heilongjiang Province during summer in 2003. The results showed that the larvae in poplar plantation are in negative binomial distribution, and six indices of aggregation revealed that it's of aggregation pattern. Survey of the larvae's vertical distribution demonstrated that the insect attack was concentrated on polar trunk in range from 1 to 4 meters in the height. An equation describing the attack and poplar trunk height position was derived as y =0 068+0 417 x -0 136 x 2+0 011 x 3 with R 2 =0 836.
出处
《昆虫知识》
CAS
CSCD
北大核心
2004年第3期241-244,共4页
Entomological Knowledge
