Preliminary Research On Biological Characteristics Of Wild Ground Covers Rubus Buergeri

Rubus Buergeri Miq., distributed in broad-leaf forest and open forest in mountain, is a Rosaceae Rubus shrub. Compare to its strong life and high value in colony ornamental. there is little deep research on these ground cover plants with perfect developing foreground. In this paper, thebasic biological characteristics of the plant are investigated by experiment in grow wild and lab, including morph and anatomy, breed characters, growth and development, photosynthetic characters etc. The result shown behind can help to new breed selection, grown management and garden and park application.1. R. Buerger's root system grown in veneer of soil between 0.1 and 0.3 meter mostly. Analyzing with anatomic structure, it is four prototypes root with no pith, and its branch root is endogenous origin. The annual caudex creeps and biennial caudex grows endlong. In caulicle cross section, the vascular bundles have different size, form a ring. In its secondary structure, secondary phloem fibers arrange a entire circle. The secondary xylem has expanse wood ray, dividing vascular tissue up to many parts. R.Buergeri's lamia are great and thin. The cells in upper epidermis are bigger than those in lower epidermnis. The cells of ncuticle are blurry both in upper and lower epidermis. The cells of spongy tissue has lage intercellular space. The epidermic cell has a little chloroplasts some times. These chloroplasts are large and has many stomatal numbers. All these are evidence the characters of the shading-tolerance plant's structure.2. R. Buerger is perfect to be cultivated in February. The leaves spread out in March. The anthesis continues between the June and the September. The nuts mature in the September to the November. The phenospectrum is advancing about a month to wild plant with longer green period and geater values in view and admire. The annual branch are grown as the letter S. The biennial branch are grown as double S. The plant cultivated by manual work is grown slowly to wilds per year. The simple flower can open to 5-6h. And the fruit are fresh about 15-19d. These two periods are maybe overlap. R.Buergeri is be likely to be transplantation in dormancy stage or shading stage. The percents of survive are highly to 90% and 98% in these two stages. Additionaly, the plant is easily to form the scope and can be prune highly without infecting growth.3. the light compensation point of R.Buergeri's male leaf is 7.2024μmol·m^-2·s^-1, the light saturation point of 850μmol·m^-2·s^-1, and the quantum efficiency is 0.0196. Relatively, the light compensation point of R.Buergeri's female leaf is 5.9060μmol·m^-2·s^-1, the light saturation point of 700μmol·m^-2·s^-1,and the quantum efficiency is 0.0208.These is typical characters of the shading-tolerance plant. The daily change of Pn represents double peak values with obvious midday rest Pn. The ecological factors infecting the photosynthetic rate of male leaf include Ta,RH and PAR, compared to Ta and RH infecting the female leaf. In the 1000μmol·m^-2·s^-1 intensity of light, ETR and NPQ increase. With the intensity of light more than 1000μmol·m^-2·s^-1, there is photoinhibition for PSâ…¡falling a little. The male leaf descend more than the female leaf. So, R.Buergeri should be implanted in shading environment.4. R.Buerger's seed germination should be dip in oil of vitriol with 33 minutes. The chroma of GA₃ is 250mg.kg^-1. The percents of germination are 56.1% after embedding in sand in 40 days. The rooting rate is 70.33% with the tender branch cuttings dealt with 500mg.kg^-1 ASD for 30 seconds. For the high rooting rate and the short grown time, the method of branch cutting is recommend.