Turf Establishment Application Waste Rubber Salt Ecological Characteristics Of Tall Fescue

Filled in waste particles in turf medium to construction of "storage salt layer" in the soil,the paper revealed the impact of plant growth and physiological characteristics of the roots of Festuca arundinacea L under salt stress around "storage salt layer" of the particles; regulatory role of root on the lawn with waste particles under salt stress; the impact of waste particles on ecological indicators and photosynthetic rate process. The results showed that waste particles decreased bulk density, soluble salt and electrical conductivity of compost medium. Under salt stress, seed germination significantly slow, it began to grow 10 d after sowing, and reached the maximum 30 d after sowing.With the increase of salt stress, the germination rate significantly decreased,and promoting germination after adding the particles; Especially moderate salt stress, the germination rate increased 12.74%after adding the particles compared with the control. With the increase of concentration of salt stress,aboveground and underground biomass of Festuca arundinacea L reduced. The higher salt concentration, it more reducing. It noted that high concentration of salt stress significantly have inhibited the growth of Festuca arundinacea L, especially the growth of roots; At the same time aboveground biomass of plant significant promoted after added with particles, especially high concentration of salt; With the increase of concentration of salt stress,chlorophyll content of Festuca arundinacea L decreased. The addition of waste particles in turf medium, the chlorophyll content was significantly higher than the control, the particles reached the maximum chlorophyll content deal with 0.9 mg-g-1 under 0.2%salt stress, and the content of chlorophyll was significantly higher than that of control (P<0.01); Waste particles mitigated the salt stress which caused reduction of chlorophyll content, increased plants photosynthetic capacity under salt stress. Under salt stress, A trend of POD activity in leaves of Festuca arundinacea L was found to reduce the performance of first and then increased, while the overall trend of the SOD activity for the first increased and then slightly decreased. Moreover, the addition of waste particles in turf medium, less impact on the POD activity, but at high concentrations slightly higher than the control; particles was significantly increased SOD activity in the stress concentration at the salt concentrations of 0%,0.2%,0.4%,0.6%,0.8%and 1%, SOD activities were increased by 28.05%,161.66%,49.11%,42.14%,35.91%and 16.29%respectively, thereby proline content of plant play an active role; In the three kinds of salt stress, the photosynthetic rate reaches its maximum at 14:00, but in the moment, leaf transpiration rate is the lowest, while particles reduce leaf transpiration rate, that is to promote greater portion of the pore closed, at this moment, adding particles to make after a clear Ci lower, indicating that particles increased photosynthetic activity of mesophyll cells at this moment.