安徽省大山馬尾松混交林地上部分生物量及生物多樣性研究.pdf

1、安徽農(nóng)業(yè)大學(xué)碩士學(xué)位論文安徽省大山馬尾松混交林地上部分生物量及生物多樣性研究姓名：邱歡申請學(xué)位級別：碩士專業(yè)：園林植物與觀賞園藝指導(dǎo)教師：傅松玲20090601AbstractTheforestrypracticeshowedthatthePinUSmassonianpureforestoflong—termplantingleadedtodeclineofthefertility，deteriorationofecologicalen

2、vironmentproductivitydecline，eretheseproblemsseriouslythreatenthesustainableusingoftheforestAcomparativestudyonthebiomassandbiologicaldiversityofpinusmassonianmixedforestsandthepureforestobtainedthemajorconclusionsasthef

3、ollowing：(1)Onthebiomassaspects，thebiomassofthePinusmassonianpureforestwere1l527t，ll亂ThebiomassofthePinusmassonianmixedforestwerebiggestintheproportion41～60％whichwerel5294t／haTheundergrowthvegetationbiomassesinthemixedfo

4、restwereobviouslylowerthanthepureforestTheundergrowthvegetationbiomassesinthepureforestwere534t／ha(2)InsimilarforeststanddensitysampleploLthemixedforestwereoptimumthegrowsofshrublayerOiltheproportion4160％Therangeofrichne

5、ssindex、Simpsonindex、ShannonWeinerindex、evennessindexandecologicaldominanceindexwere045381，066090，124245，O6卜094，O10～033Thebiggervalueoftherichnessindex、SimpsonindexandShannonWeinerindexcentralizedappearedontheproportion4

6、160％Thebiggervalueofevennessindexcentralizedappeared011theproportion6080％Thebiggervalueofecologicaldominaliceindexcentralizedappearedonthepureforest(3)Inherblayerthemixedforestwereoptimumthegrowsontheproportion6180％thera

7、ngeofrichnessindex、Simpsonindex、Shannon—Weinerindex、evennessindexandecologicaldominanceindexwere037091，033053，052074，059091，047067Thebiggervalueofrichnessindexcentralizedappearedontheproportion21％ThebiggervalueofSimpsoni