Cold Resistance Of Zanthoxylum Bungeanum Shoots

Zanthoxylum bungeanum is one of tree species with superior economic worth in China,and possess abundant nutritive value,medical and health care value.But its distributing is yet limited becanse of many causes such as climate.Low temperature is an important factor that restrain the plant distributing and growing on the earth. Zanthoxylum bungeanum is a main fruit tree in Gansu province.Developing the delicious production has becoming a kind of new agriculture industry,and the areas of cultivating have increased year by year.But because of the worse cold resistance and weaker disease resistance,the development is limited to some extent.There are so many freezing injuries in the production and lots of new Zanthoxylum bungeanum being introduced that it is necessary to study the cold sistance and the ability of two Zanthoxylum cultivars over winter.Cold resistance is the hereditary characteristic of the fruit tree.It is significant to determine the hardiness of Zanthoxylum bungeanum,witch is useful for rational planting,cold resistance breeding,appraising and popularizing the cold resistance Zanthoxylum bungeanum.In this paper,were used to determine two main cultivars of Zanthoxylum bungeanum, cv.'Mianjiao'and'Cijiao',planting in Hetan Town of Gansu Province,having different hardiness in their branches after treated with different low temperatures,by correlation analysis and subordinate function analysis.The cold resistance characteristics of Zanthoxylum bungeanum was first systematically investigated from the levels of growth characteristics and Physiological characteristics,based on cold resistance system,aims to study the cold resistance characteristics and mechanism.The cold resistance characteristics of Zanthoxylum bungeanum has genetic variation of a large company at one-year-old branches,the cold resistance characteristics is best in two cultivars of tests, The main results are follow:(1) Spraying 0.5 % KH2PO4 and 0.5% sucrose can heighten their soluble sugar content, soluble protein content, Pro content,POD activity and SOD activity and shoot growth, yield and quality. The result increases with increasing times. 0.5 % KH2PO4 is better than 0.5% sucrose.(2) Bud picking can heighten their soluble sugar content, soluble protein content, Pro content,POD activity and SOD activity and shoot growth, yield and quality,(3) Mianjiao are increased than Cijiao of the two experimental material'cold resistance.