摘要
本文从油松生理持性方面研究了封山育林对赤松毛虫(Dendrolimus spectabilis)的抗虫效应。以封山区针叶与未封山区针叶在室内、林内的对比养虫试验结果表明,封山区针叶饲养的幼虫在体重、化蛹率、蛹重及雌蛹怀卵量等方面均明显低于未封山区。这说明封山区针叶能有效地抑制松毛虫的存活、生长和繁殖。两类针叶的蛋白质含量没有显著差异,但封山区针叶的排脂量、粗脂肪含量较高,可溶性糖含量较低,因而不利于幼虫消化吸收。幼虫取食封山区针叶后,其虫粪中的蛋白质含量较高,粗脂肪含量较低。
The paper studied the closed hill's effect on resistance to the pest insect (Dendrolimus spectabilis') from the physiological characteristics of Pinus tabulae formis.The results of feeding the insect in the laboratory were as follows,per laruae,per pupa weight and per moth's egg quantity of the closed hills were much lower than the unclosed hills.This indicated that the needle of the closed hills could effectively reduce the survival rate,development and reproduction of the pest.The results of the chemical analysis of the main nutrient compositions of the needle indicated that the concentrations of protein,fat,and resin of the closed hill's needle were higher than those of the unclosed hill's.However,the concentration of soluble sugar was lower.While the needle of closed hills was not favourable for the pest to utilize,it was found that the quantity of protein in the excrement was much higher when the pest was fed on the needle of the closed hills
出处
《北京林业大学学报》
CAS
CSCD
北大核心
1990年第2期6-12,共7页
Journal of Beijing Forestry University
关键词
封山林分
针叶
油松
赤松毛虫
抗性
Pinus tabulaeformis,dendrolimus spectabilis,resistance to pest,protein,fat,soluble sugar
