Preliminary evaluation on aluminum tolerance of Axonopus compressus

In order to explore aluminum tolerance of Axonopus compressus cultivars, 6 traits (total number of secondary branches, total stem length, leaf firing percentage, turf quality, relative shoot dry weight and relative root dry weight) of 19 different geographical distribution of A.compressus germplasm and one cultivar were measured in the study. The results showed that there were significant (P0.05) or very significant (P0.01) difference among different germplasm on 2.1 mmolL-1 aluminum treatment. Coefficient of variation of different indicators ranged from 18.73% to 39.63%, of which the relative shoot dry weight (18.73%) was minimum and turf quality (39.63%) maximum. There were significant correlations（maximal correlation coefficient of -0.920）among different indexes of A.compressus germplasm. Based on six traits, SPSS 16.0 was used to divide carpet grass germplasm into three aluminum tolerance types: aluminum tolerance, intermediate and aluminumsensitive.