Dissertation > Excellent graduate degree dissertation topics show

The Study on Picrorhiza Scrophulariiflora Pennell in Propagation and Cultivation Methods

Author: SuZeChun
Tutor: XuZhongZhi
School: Chinese Academy of Agricultural Sciences
Course: Crop
Keywords: Picrorhiza scrophulariiflora Pennell propagation methods Cultivation methods
CLC: S567.239
Type: Master's thesis
Year: 2011
Downloads: 28
Quote: 0
Read: Download Dissertation

Abstract

The P. scrophulariiflora is also referred as the Tibetan-huhuanglian, Geguluze and Hulian. It is the herbaceos perennial that belongs to the P. scrophulariiflora of Scrophulariaceae. It is mainly distributed in the east of Nitlamu which is the southern part of Tibet in China, and is in the White Horse Snow Mountain among the Dexin County, Zhongdian County, Weixi County and Gongshan County which are the northwestern part of Yunnan Province. Due to the intense growth of population and the economic activities of human beings etc, the eco-environment of the P. scrophulariiflora suffered serious damage, which makes the limited resources of the P. scrophulariiflora face with the danger of being extinguished. The P. scrophulariiflora was listed as the third level of the national key preservation of the wild materials in 1987, and in 1999, the state council classified the P. scrophulariiflora as the second level of the national preservation of the endangered plants.The unlimited excavation of the P. scrophulariiflora is closely related to its high medical values. In recent years, both the domestic researchers and the foreign researchers have committed a large number of researches in the aspects of its raw pharmacognosy, chemical components, and pharmacology of the bio-activators etc. They have found that the P. scrophulariiflora can function well in the aspects of liver-protection, gallbladder-advantage, antibiosis and inflammation diminishing, HBV-resistance, asthma-resistance, tumor-resistance, blood fat decreasing as well as immunoregulation etc.Yunnan Province possesses advantaged geographic conditions in plating and developing the P. scrophulariiflora. In the process of industrialization, it is urgent to require providing the seeds for reproduction as well as the methods of mating plating technologies. There are many methods for the reproduction of the P. scrophulariiflora. This study via the deployment of the technologies of the sexual propagation and the vegetative propagation for the P. scrophulariiflora, the author considered that the sexual propagation is able to expand the number of seeds to some extent. However, due to the short live circle of seeds, only the immediate picking up and the immediate transmission are done can we improve the living rate of the seeds effectively. The method of cold storage into the wet sands can expand the live circle of the seeds, while because of the limitation of the mountainous regions, the technology of promotion is relatively difficult. The number of seeds that the vegetative propagation provides is relatively fewer, but it can undertake cottage reproduction in spring, summer and autumn, and the living rate of cottage reproduction is relatively higher. Via the usage of the growth regulator for the summer cottage, we found that ABT7 worked well in hastening rooting, with the IBA as the inferior, and the NAA had little effect in it. Compared with the seeds of triennium sexual propagation and the vegetative propagation, we found that every physical signs of the triennium seeds only reached those of the seeds of the annual vegetative propagation. The triennium seeds cannot be excavated, whereas the triennium seeds of the vegetative propagation have reached the standards of excavation. Therefore, this study mainly utilizes the vegetative propagation in the aspects of the research of the plating technologies of the P. scrophulariiflora and the selection of materials.In the aspect of the research of the plating technologies, this study first undertook the adaptation research for the P. scrophulariiflora of different origins. The origins of B1 and B5 possess comprehensive adaptation in the aspects of yielding ability and stability. Chose the origin of B5 as the experiment materials, and further deployed the research of the experiment of light temperature, and the relation between fertilizer and density. The results showed that the proper shadowing from the light can promote the output of the P. scrophulariiflora. The output of the P. scrophulariiflora can be effectively improved via covering the mulch to increase the ground temperature. The results of the orthogonal test for the relation between the fertilizer and density of the P. scrophulariiflora showed that the best plating mode of the P. scrophulariiflora is:the row spacing is 25 cm X 20 cm,2000 kg of the base fertilizer,18kg of the pure nitrogen and 6.4kg of the pure phosphorus are utilized in every 666.7 m2, and the potash fertilizer is properly used.

Related Dissertations

CLC: > Agricultural Sciences > Crop > Economic crops > Medicinal crops > Herbal > Perennial > Other
© 2012 www.DissertationTopic.Net Mobile