The Study Of The Plant Resources Of Eurya And Vegetation Propagation Techniques

Eurya is a genus of dioecious shrubs and trees(separate female and male plants)native to tropical and subtropical Asia and Pacific islands. As an ornamental, Eurya has much to recommend it, with its strong branching pattern, dark green leaves, copious greenish-white flowers and, on female plants, black berries. The minute flowers are attractive.Eurya is a kind of ornament plant that has the potentiality to be exploited very much.There are abundant resource of Eurya in China, account for total kinds of 60% .In this thesis,Eurya muricata Dunn, Eurya nitida Korthals, Eurya alata Kouski serving as the experimental materials, observe their biological characteristic, view and admire the properties in detail. Furthemore, the propagation and the resistance was quantitative analysed.The main result are described as follows:1 .Three species of Eurya was introduced and cultivated. The results are: Eurya muricata,Eurya nitida and Eurya alata can produce flowers and fruits in the introducedloci, when the lowest atmospheric temperature is -7C in 2003, three observed rooted cutting can live through the winter with safety.2.Vegetation propagation techniques: According to season, to Eurya muricata and Eurya nitida, cuttings in spring has the best result on rooting rate, sum of laternal roots and length of the longest root. For Eurya alata has the best result in Autumn, the cutting rooting rate is 3.3% and 41.6% higher than cutting in spring and in autumn. Hormone had significant effect on rooting rate to contrast with CK, IBA held higher rooting rate than other two. With different concentrations of hormone, the most suitable content of hormone for inducing rate was 50ppm. pass low or too high density could inhibite the rooting traits .3.The effect of seed vernalization show :Keep seed in cold temperature storage and treat with GA3 has significant effects on germination rate and could shorten time of sprouting . Eurya nitida has most high germination rate among them,secondly it is Eurya alata,Eurya muricata hardly sprouts. Study show that soaking cold storage seeds in 300mg/L GA3 solution for 24h is the best,the average rate of germination percentage to E.nitida is 86.3%,E.alata is 30%. 4.The resisting is studied:The way of conductivity to determine grounds' freezing resistance was used, the results are described as follows.according to the order from strong to weak in the -15C lowest temperature condition: Eurya alata>Eurya nitida>Eurya muricata. 5.Use development prospect forecast of the garden:Can be used as everygreen ground cover plants,afforestation seeds,hedgerow.potted landscape.cut spending when the respect.