Study On The Dynamics Of Plant Community Of High-raiway'slope Sprayed By Hydro-seeding

Studied the dynamic changes on the plant community of the slope of high- railway (from Qin huang dao to Shen yang) sprayed by hydro-seeding, to probe the importance of structure characteristics in the utilization of hydro-seeding technology. The trial was designed with three treatments. A: Medicago sat! va +Astragalus adsurgens.+Festuca arundinacea +Lolium perenne +Poa pratensis.;B:Me]i]otus alba +Trifo]ium repense +Eestuca arundinacea +Caragana korshinskil komar: C: Medicago sativa +.4stragalus adsurgens +Festuca arundinacea +Aorphafruticosa. and analyzed structure characteristics and dynamic changes ,as well as the mutual relations with environment factors on the whQte representation and interspecies competition of plant community in course of development, in order to control the situation by means of artificial measurements and stabilize the direction for sustainable development. 1. Knowing the relationship between child-bearing period of vegetation and environment factors (precipitation and mean-temperature of months) by observing the chart of phynology. 2. The structure of canopy was reasonable, the distribution shape of aboveground and below ground biomass liked pyramid. 3. Seasonal distribution of biornass could be described by Logistic equation, and the equation was: W1ki11+[AietBlt)] 4. The relationship between ratio of aboveground biomass and below ground biomass and environmental factors were positive correlation was showed between ratio of aboveground biomass and below ground biomass and temperature, and not correlation with precipitation. 5. Species-abundance of three treatments was as long well with the logarithmic normal distribution hypothesis (p