The Improvement Of AMF On Plant Growth And Interception Capability Of Vegetation-growing Concrete

Vegetation-growing concrete technology is a new way for the protection andgreening of slopes with poor quality. Because of its good effect, this technology hasbeen used for lots of projects of slope restoration in many provinces and cities.However, there’re still a few problems about this technology, including the materialsstress to the growing of plants, the loss of soil nutrient during maintaining, thedegradation of vegetation and the bad growth status and low physiological activityof plants and so on. These problems may lead to the bad slope protection effect ofvegetation-growing concrete，making the projects fail to achieve the desired effectof protecting slopes for a long time and restoring the ecology.According to the problems above, two kinds of Arbuscular Mycorrhizal Fungi,Glomus mosseae and Glomus intraradices, were applied to Vegetation-growingConcrete in this experiment, in which Poa pratensis cv. Balin, one of cold-seasonturf grasses was used as the test plant, to investigate the improvement of inocula onthe plants in vegetation-growing concrete and study the optimal ratio of thevegetation-growing concrete improved by AMF. Furthermore, the interception rateof nitrogen （N） and phosphorus （P） by the improved Vegetation-growing Concretehas also been studied, to provide reference for the engineering applications of thecombination of mycorrhizal technology and vegetation-growing concrete technologyin controlling non-point source pollution.Plants in vegetation-growing concrete can be infected by AMF effectively. Thesingle application of Glomus mosseae （GM） can obviously improve the infectionrate to43.27%. Poa pratensis has stronger dependence on Glomus mosseae andmixed fungicides （MI） with little difference than Glomus intraradices （GI）. Theplant height and aboveground biomass with MI treatment can be increased by15.8%and20%respectively. GM treatment can increase the underground biomass by48%higher than any other treatment. GM treatment can significantly improve the prolineand soluble sugar contents by45.4%and27.7%and reduce the malondialdehyde（MDA） content by14.7%which can enhance the plant stress-resistance. GMtreatment can make the plants get the highest CO2assimilation and Water UseEfficiency （WUE）, enhancing Poa pratensis’ ability of using the light and water andimproving better growth of plants. Glomus mosseae is the best choice to improvevegetation-growing concrete.In the orthogonal experiment of component ratio of vegetation-growingconcrete, the optimal combination of germination, height, biomass and MDA content of Poa pratensis is A₁B₁C₂D₃, while the optimal combination of7d and28dcompressive strength is A₅B₁C₁. By comprehensive consideration of the growthstatus of plants and the demand of compressive strength, the final optimalcombination is A₁B₁C₂D-3, in which the ration of cement is6%, the ratio of organicmatter is5%, the ratio of green additive is4%and the ratio of inocula is4%.The application of AMF inocula can improve the interception of N and P byvegetation-growing concrete effectively. For influent with different concentrations,the retention effect of N and P in low concentration of water is better than in middleand high concentration of water. The retention effect of P is better than the retentioneffect of N in the same concentration of water. Of all treatments, GM treatment hasthe best effect of intercepting N and P.