Study On Characteristics Of Odor Of Giant Panda Habitat In The Qinqing Mountains

The giant panda, which lives only in sichuan, shaanxi and gansu, is the national treasure. Protecting the Qinling panda has very important scientific research value and practical significance. According to predecessor's researches, the odor properties of the giant panda were investigated deeply in this thesis for the first time, adopting field investigation and indoor analysis methods. The main results are as follows:1. The vegetation types in the Giant Panda's Habitat of the Qinling Mountains can be divided into 4 vegetation type groups, 8 vegetation types, 9 sub-types, 13 formation group and 30 representative formations. Among them, coniferous forest and broadleaved forest, which are the major vegetation types and account for 92.4% of the total area of the habitat, are the zonal vegetation for the giant panda of the Qinling Mountains. Coniferous forest includes cool-temperate coniferous forest, temperate coniferous forest and temperate coniferous broadleaved nixed forest, and Formation Larix chinensis, Formation Abies fargesii, Formation Pinus tabulaeformis, Formation Pinus armandii, Formation Pinus tabulaeformis- Quercus atiena var. acuteserrota, Formation Pinus armandii- Quercus atiena var. acuteserrota, Formation Pinus armandi-Betula spp., Formation Pinus armandii, * spp., Formation Pinus tabulaeformis, * spp., ect.2. The odor substance of the giant panda habitat comes from certain tree, shrub and herb in the habitat. The complement and interaction of the odor substance from the three layers form the special odor of each habitat. The major odor chemical constituents of pinaceae plants in tree layer areα-Pinene, Limonene, terpinolene, myrcene,β-pinene, camphor, borneol, ect. While the odor strength of aroma components in other families, such as methyl eugenol and 1, 8-cineole from Alangium chinense and cedrol from Arborvitae, is quite lower than pinaceae. The multiple odor substance is the odor character of the tree layer. And the major odor chemical constituents come from the three staple food bamboos of the giant panda, Fargesia qinlingensi, Bashania fargesii, Fargesia dracocephala. Eucalyptol, Thymol, Caryophyllene, Bisabolene, Caryophyllene oxide consist of the main odor chanical constituentsof Fargesia qinlingensi; 1, 2-Propanedio and Ethylbenzene are the main odor constituents of Fargesia dracocephala; (Z)-3-Hexen-1-ol, 1, 2-Propanediol and 2-Hexenal are the main odor constituents of Bashania fargesii. The plants with odor in herb layer are relatively less, and they are Asterhandelii Onno., Paederia scandens(Lour.) Merr., Perilla frutescens(L.) Britt, Artemisia annua L., Valeriana officinalis L, Herba Patriniae, Acorus tatarinowii Schott, ect. The odor constituents in those plants are Limonene, perillaldehyde, Caryophyllene, bornyl acetate, pinene, ect.3. Accoding to chemical constituents, the odor type of the Giant Panda's Habitat of the Qinling mountains can be devided into pine-spicy-phenol type, pine-lemon-spicy-phenol type, pine-woody-phenol type, pine-lemon type, green-floral type and other types. The pine-lemon-spicy-phenol type mainly distributes around the key areas of the habitat, and the green-floral type and other types distribute around potential habitats. The rest three types distribute in a wider range of habitat, and the pine-lemon type is the most common odor type in the habitat and it distributes most widely, existing in Formation Pinus tabulaeformis, Formation Pinus armandii, Formation Pinus tabulaeformis, * spp., Formation Pinus armandii, -Betula spp., Formation Pinus armandii, * spp., Formation Quercus atiena var. acuteserrota, Formation Quercus variabilis and Formation Carpinu turczaninowii. The terpenes in pinaceae are the major type, and different compostion of shrub and herb may change this feature. Therefore, this odor type can be further divided into pine-lemon-spicy type and pine-lemon-green type.