The Research On Introduction And Cold Resistant Adaptability Of Photinia Plants In Shandong Area

The Photinia plants, especially Photinia×fraseri is the colorful tree in the botanical garden forestation, which have been used in many areas at present. However, the low temperature freezing injury affects its application that distributed substantial clause. In the research, selecting three experimental fields in Shandong---Changqing in Jinan area,Xinglongzhuang town in Yanzhou area and Luozhuang in Linyi area. The introduction includes 5 kinds of plants---Photinia serrulata,Photinia davidsoniae,Photinia×fraseri'Red Robin',Photinia glabra var. Robens and Photinia×fraseri'Jin Hong'. It was observed the change under natural low temperature on the growth and compatible change. And it was mensurated cold resistant physiological biochemistry by the leaves under artificial low temperature. It was used the methods of subordination and counter-subordination function to compare the strong or weak of various trees. The main result is as follows:1. Under exterminating nature vegetative season, the condition of growth and crown, and obtains the difference of various trees in different periods of growth.2. Measuring the Photinia plants leaves of electrical conductivity under different low-temperature treatment, and combining the Logistic equation to calculate LT50, and gets the order from strong to weak in the three experimental fields.3. Along with low-temperature treatment picking up,the MDA content of various trees'leaves rises gradually, MDA content of Photinia davidsoniae is the highest in the entire low-temperature treatment period. However, the MDA content is correlation with the cold resistance inversly, in the treating processes it changes in fluctuation condition.4. With low-temperature treatment picking up, the soluble protein, the soluble sugar and the dissociation proline content in tree leaves increase gradually, and the soluble sugar content increases the scope is being related with cold resistance. The conclusion, which obtains with the method of the subordination function, is more consistent.5. Under the nature temperature decrease condition, to survive in winter, the observation on the Photinia plants the freezing injury condition.6. Using the methods of subordination and counter-subordination function, we can get the conclusion: the cold resistance strong and weak order, in Changqing and Yanzhou, it is Photinia×fraseri'Red Robin'> Photinia glabra var. Robens>Photinia×fraseri'Jin Hong'>Photinia serrulata>Photinia davidsoniae. But in Luozhuang, it is Photinia×fraseri'Red Robin'>Photinia×fraseri'Jin Hong'>Photinia glabra var. Robens>Photinia serrulata>Photinia davidsoniae.