Study on Resistance of C.dactyloncy Varieties in Vegetation Concrete under Cold and Heat Stress

The germination and growth of 6 Bermuda grass varieties in the vegetation concrete habitat were observed,then the physiological characteristics of 5 better Bermuda grass varieties in the vegetation concrete habitat under cold(5 ℃) or heat(40 ℃) stress were investigated,and the stress resistance physiological indexes of their leaves,such as conductivity,content of free proline,POD activity and MDA content were assayed immediately after treatment.The results showed that Common and Jackpot Bermuda grass had better adaptability to the vegetation concrete habitat;the germination and growth of tested Bermuda grass varieties in vegetation concrete formula No.1 were all better than those in vegetation concrete formula No.2,so vegetation concrete formula No.1 was more suitable for slope-protecting eco-engineering;the stress resistance of different Bermuda grass varieties had significant differences;cold and heat resistance of different Bermuda grass varieties had significant differences,Nanjing and Xinnong Bermuda grass had stronger cold resistance,Nanjing and 040459/680 Bermuda grass had stronger heat resistance.Comprehensively considering morphological indexes,growth rate,turf mature stage and resistance indexes,Common and Nanjing Bermuda grass were better than other Bermuda grass varieties,they should be applied in the slope-protecting eco-engineering.