杭州新胸蚜对2种蚊母树的危害性比较分析word格式论文.docxVIP

AbstractThe experiment selects Distylium racemosum and Distylium myricoides as the tested material which are located near ShuShan of Hefei in Anhui Province to discuss the different damage degree from Neothoracaphis hangzhouensis. Compare the differences of damage degree between Distylium racemosum and Distylium myricoides by mensurating the numbers and the diameter of cecidums. Find out the possible reasons for the differences of damage degree by mensurating and analysing the inclusions of leaves from these different trees. Use the LI6400 portable photosynthetic apparatus produced by the American LICOR to measure the net photosynthetic rate and chlorophyll fluorescence parameters of Distylium racemosum and Distylium myricoides in different seasons, and the changes of photosynthesis characteristics of Distylium racemosum and Distylium myricoides infested by Neothoracaphis hangzhouensis were studied in this paper. The results were as follows.The total number of cecidum on Distylium racemosum leaves is far more than it on Distylium myricoides leaves; the number of cecidum on a single leaf of Distylium racemosum is up to twelve, while the maximum number is two on a Distylium myricoides leaf; For the same number of cecidum on a leaf, the average diameter of cecidum on Distylium racemosum leaf is significantly larger than it on Distylium myricoides leaf. It is showen that the area and the degree of damage on Distylium racemosum leaves is more serious than it on Distylium myricoides leaves.Sixteen kinds of amino acids were measured from the leaves of Distylium racemosum and Distylium myricoides, and there are significant differences were appeared in nine kinds of amino acids; the regression equation between the damage degree(Y) and the relational amino acid (X) isY=0.27x1+0.34x2+0.21x3-0.12x4-0.11x5+0.23x6+0.17x7+0.18x8-0.15x9, and the mostrelational amino acid is glycine among the all relational amino acids; the significant positive correlations were founded betwe