廣州北郊水稻田節(jié)肢動(dòng)物多樣性調(diào)查研究.pdf

1、中山大學(xué)碩士學(xué)位論文廣#I：IL郊水稻田節(jié)肢動(dòng)物多樣性調(diào)查研究答辯委員會(huì)(簽名)主席：委員：學(xué)生：周文剛導(dǎo)師：張文軍專(zhuān)業(yè)：農(nóng)業(yè)昆蟲(chóng)與害蟲(chóng)防治■揚(yáng)玨僵躲彳狒中山大學(xué)昆蟲(chóng)學(xué)研究所2007年5月周文剛廣州北郊水稻田節(jié)肢動(dòng)物多樣性調(diào)查研究AFieldSurveyonPaddyRiceArthropodBiodiversityinNorthernGuangzhouMajor：AgriculturalEntomologyandIPMName：Zho

2、uWengangSupervisor：ZhangWenjunABSTRACTTostudythearthropodbiodiversityandcommunitydynamicsinricefieldsisSOimportantforadetailedunderstandingofnaturalequilibriumofriceinsectpests，andforthebiologicalcontrolofficeinsectpests

3、ThisstudyusedthesamplingmethodtosurveythearthropodbiodiversityandcommunitydynamicsinapaddyricefieldofnorthernGuangzhouIntotalof19467specimenswerecollected，inwhich2classes，8orders，29families，includingsevenfamiliesofneutra

4、linsects，fourfamiliesofinsectpests，andeighteenfamiliesofnaturalenemieswerefoundTheresultsshowedthat：(a)thepaddyricefieldwasrichinnaturalenemiesofriceinsect；(b)withthedevelopmentofriceplant，arthropodspeciesrichnessincreas

5、ed；Shannon—Winnerindexandevennessindexincreasedfirstlyanddecreasedthereafterandachievedthemaximuminthericegrainfillingstage；concentrationindexanddominanceindexdecreasedfirstlyandincreasedthereafterandachievedtheminimumin

6、thericegrainfillingstage(c)adirectproportionalrelationshipexistedbetweenriceinsectpestsandtheirnaturalenemiesTheseresultsshowedthatthenaturalenemiesofriceinsectpestswouldplayapositiveroleinthenaturalequilibriumofriceinse