Study on the physical properties of different turfbed soil formula for golf green andthe relationships with turf performance of creeping bentgrass

Creeping bentgrass performance indexes were simplified with principal component analysis and the relationships between the physical properties of different turfbed soil formula and turf performance of creeping bentgrass were studied with canonical correlation and stepwise regression analysis. The results showed that the influence ability of components in turfbed mixture on physical properties and turf performance were peat middlecoarse sand very fine sand plus silt and clay fine sand. In the turfbed soil, the peat and middlecoarse sand mainly affected the bulk density, total porosity, capillary porosity, saturated hydraulic conductivity and all selected turf performance indexes. Very fine sand, silt, clay and peat mainly affected the airfilled porosity. And fine sand had no significant effect on any indexes. The regression equations of turfbed soil components with their physical properties and turf performance of creeping bentgrass were established with stepwise regression analysis.