Research On Habitat Adaptability Of The Dendrobium Candidum In Maolan Kaster

This paper has researched the habitat of the wild Dendrobium candidum in Maolan kaster forest and depicted the implementation process of its manual planting technique. Through observing the cultivation data of the Dendrobium candidum in the canopy, the habitat condition of the Dendrobium candidum has been studied and a more reliable scientific basis has been provided for manual planting of the Dendrobium candidum. From the survey and analysis of the habitat factors about the wild Dendrobium candidum, its related physiological factor was obtained and the condition of the habitat factor can be inferred according to the physiological factor sequentially. the solid scientific foundation was built for the manual planter. Finally, according to the analysis of the results, the following several aspects were obtained:1. Wild Dendrobium candidum growth under the natural condition and has no man-made control moisture. Manual cultivation Dendrobium candidum may reduce or perhaps increase the moisture content under artificial advantageous control, which has advantage in the formation of suitable vegetal habitat. And the polysaccharide content of the Dendrobium candidum can increase further. In summer, because of the sufficient sunlight, the Dendrobium candidum can produce the massive organic matters through the photosynthesis, and thus has the higher moisture content use efficiency.2. The moisture content use efficiency of the Dendrobium candidum can be menstruated through the value of the and the WUE. The consistent conclusion has been drawn. The WUE value is 0.606δ13Cμmol/ mol for the sample of the man-made Dendrobium candidum. The menstruated result of the polysaccharide content corresponds with that. This has explained that the moisture -use efficiency have the very close correlation with the habitat for the Dendrobium candidum.3. For Dendrobium candidum, the content of the different elements is different in different in growing habitat. The content in the Dendrobium candidum growing under the wild environment is less than that in the manual cultivation Dendrobium candidum. Under the wild condition, the natural resource is limited and the supply is not balanceable comparing with the artificial condition. The Measured N, P, K, Ca, Mg are necessary elements for the t plant growth and have affection on the metabolism, the growth, the photosynthesis, the insect proofing and other vital activities of the plants. What should be pay more attention is that the content of element Ca is very high growing under the Maolan karst forest. The further research can be carried out about whether the high content of element Ca has the pharmacological action influence on this plant.4. Through comparing the wild Dendrobium candidum in the stone habitat with the tree habitat, we researched the growing conditions. Through adjusting the each item of habitat factors of the artificial Dendrobium candidum, the best planter effect can be achieved. The test result of the sample indicated that for the man-made Dendrobium candidum, the moisture-use using efficiency is high, the output is the highest, the dry weight rate is high, and the polysaccharide content is high, which is about 16.2%. The microelement content is rich. And it can be used as the raw material of the traditional Chinese medicine tie pi feng dou with high quality. It has the better ecological benefit and the economic efficiency also.This paper has explored the relation of physiology factor and the habitat factor of the Dendrobium candidum from various aspects and through different methods. The foundation was established for the setup of the growth appraisal system of the Dendrobium candidum in the next step. And the theory basis has been provided or the manual planting.