欢迎访问林业科学,今天是

林业科学 ›› 2004, Vol. 40 ›› Issue (1): 110-116.doi: 10.11707/j.1001-7488.20040118

• 论文及研究报告 • 上一篇    下一篇

城市污染促进瘤坚大球蚧种群增长的营养学研究

薛皎亮 谢映平 范三红 李艳芳   

  1. 山西大学生命科学与技术学院,太原030006
  • 收稿日期:2002-03-28 修回日期:1900-01-01 出版日期:2004-01-25 发布日期:2004-01-25

A Study on the Nutriology Promoting the Population Increase of Eulecanium gigantea by Urban Pollution

Xue Jiaoliang,Xie Yingping,Fan Sanhong,Li Yanfang   

  1. College of Life Science and Technology of Shanxi University Taiyuan030006
  • Received:2002-03-28 Revised:1900-01-01 Online:2004-01-25 Published:2004-01-25

摘要:

瘤坚大球蚧属同翅目蚧总科蚧科,是我国北方城市林木重要害虫。笔者于1998—1999年在太原市选择了5个污染程度不同的街道区域,同时,在相距6 0km以外的太谷县选择山西农业大学植物园作为清洁对照区,研究了在污染环境中寄主树木国槐枝条和叶片内几种营养物质含量变化与蚧虫种群密度的关系。结果表明:(1)污染区国槐枝条和叶片内还原糖、总糖、可溶性蛋白质和氨基酸的相对含量极显著地高于清洁对照区。(2 )在5个污染区和一个清洁区,蚧虫的虫口密度依据污染强度而增加,寄主枝条还原糖和可溶性蛋白质的含量与虫口密度之间呈正直线相关关系,虫口密度与还原糖之间的关系式为Y1=87.6 02 8X1-117.825 0 ,相关系数r1=0.98。虫口密度与可溶性蛋白质之间的关系式为Y2=2.893 6X2-142.152 3,相关系数r2=0.84。(3)寄主枝叶内营养物质含量在3—10月份的变动趋势呈现出两个高峰期和一个低谷期,对照该蚧虫生活史,恰好与蚧虫的两个取食高峰和一个不取食的卵期相对应,说明城市污染使寄主树木体内营养物质含量升高与蚧虫生物学的吻合,是导致蚧虫种群增长的一个重要原因。由此,提供了污染环境中蚧虫增殖的营养学例证。

关键词: 城市污染, 蚧科, 蚧虫, 瘤坚大球蚧, 营养学

Abstract:

The soft scale, Eulecanium gigantea (Shinji) (Homoptera: Coccoidea; Coccidae) was an important pest in cities of northern China in recent years. During 1998—1999, five experimental districts with different degrees of air pollution in Taiyuan City and one clean area as the contrast district at campus of Shanxi Agricultural University located in Taigu County were selected. The nutriological relationship between the soft scale population increase and its host plant was studied. The results showed that (1) In the pollution districts, the quantity of reductive sugar, general sugar, soluble protein and amino acids in twigs and leaves of the host tree, Sophora japonica, were much more than those in the clean district. (2) In the sample districts, the soft scale population densities increased as the air pollution deteriorated. At the same time, the contents of reductive sugar and soluble protein in twigs were positively correlated to the population density of the scale insect significantly. The regression equations were made out respectively in Y1=87.602 8X1-117.825 0, with correlation coefficient r1=0.98, and Y2=2.893 6X2-142.152 3, with r2=0.84. (3) During March to October, two peaks and one valley were appeared in the content fluctuation of the nutrition substances in host tree twigs. That echoed respectively to the two feeding stages and one egg stage of the soft scale in its life cycle. It was concluded that a higher content of nutrition substances in the host tree in polluted urban environment may be one of the important factors which make the scale insect greatly propagating. An nutriological evidence was provided by this research in the trend of scale insect population to increase in polluted urban environment.

Key words: Urban pollution, Coccidae, Scale insect, Eulecanium gigantea (Shinji), Nutriology