Rela tionship between Mean Popula tion Density andWorm Hole ofH ylobite lus xiaoi Zhang in Sla sh Pine / 萧氏松茎象虫口密度与虫孔数的关系研究

44 p lotswere set up in different slash p ine p lantations in J iangxi Province. The relationship between themean population density of Hylobitelus x iaoi and the mean worm hole in slash p ine were investigated and 5 functionswere found respectively. The results showed that the best suitable mathema...

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Bibliographic Details
Published inForest research (Beijing) Vol. 21; no. 3; p. 411
Main Authors 彭龙慧, 许永青, 温小遂
Format Journal Article
LanguageChinese
Published Beijing Chinese Academy of Forestry 01.01.2008
Subjects
Population density
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Summary:44 p lotswere set up in different slash p ine p lantations in J iangxi Province. The relationship between themean population density of Hylobitelus x iaoi and the mean worm hole in slash p ine were investigated and 5 functionswere found respectively. The results showed that the best suitable mathematics model could be described as: Y =0. 082x2 + 0. 2 216x + 0. 063, and the table of relationship between the mean population density of H. xiaoi and themean worm hole in slash p ine were established, which p rovided a simp ly method for number investigation andforecast of H. x iao in slash p ine p lantations.
ISSN:1001-1498