| Bermudagrass(Cynodon dactylon(L.)Pers.)is the most valuable and widely used lawn grass in the warm season turfgrass,which is well known as optimal turf species of warm season turgrass.Bermudagrass sod is the most common way to plant lawn in gardens.In order to solve the problems that low survival rates and bad quality of constructed turf which are caused by the poor soil quality in the transplanting destination.Single factor experiment design was taken in this study,and common soil as control group was compared with treatment group which consists of six matrix combinations.The six matrix combinations were sludge,peat,nutrient soil,nutrient soil: fly ash(1:1),peat: sand(1:1)and sand: nutrient soil(1:1).This study selected the matrix combinations of the optimum growth for Bermudagrass sod by appearance quality evaluation and comparison of physiological and biochemical indexes,which provided a good scientific basis for the solution of turf transplanting.The main findings are as follows:(1)The effect of different substrates on the appearance quality of Bermudagrasssod was different: The synthetic order of appearance quality: sludge>peat>peat: sand(1:1)>nutrition soil: sand(1:1)= CK>nutrient soil>nutrition soil: fly ash(1:1).Among them,sludge had the fastest survival speed of all base types,which was a week ahead of the peat;also,it had dark green color and good uniformity.The second one is peat,which has bottlegreen color,lighter than sludge.In addition,nutrient soil,nutrient soil: fly ash(1:1),their appearance quality evaluation result is lower than CK group,and both of them cannot satisfypeople's viewing demands,which are not recommended.(2)The results of adding different substrates on physiological indexes ofBermudagrass sod were as follows: Sludge had the highest content of chlorophyll,having significant difference with other groups(P<0.05);nutrition soil: fly ash(1:1)had the lowest content of chlorophyll,which was significantly different from the other groups(P < 0.05).For relative water content,sludge had the highest relative water content,having no significant difference(P > 0.05)with nutrition soil: sand(1:1);nutrition soil: fly ash(1:1)had the lowest relative water content.Sludge had the highest content of free proline,which was significantly different from the other groups(P < 0.05)except the Peat group,and nutrition soil had the lowest content of free proline.Sludge had the highest content of soluble protein,which was significantly different from the other groups(P < 0.05)except the Peat group and CK group.However,all of peat: sand(1:1),nutrition soil: sand(1:1),nutrient soil,nutrition soil: fly ash(1:1)and peat were lower than CK;the nutrient soil group had lowest content.For SOD activity,CK had the highest content,which was distinctly different from other groups,while sand: nutrient soil(1:1)had the lowest content.For MDA,the lowest was the sludge;the peat just was higher than sludge,both of them were significantly different from the other groups(P < 0.05);CK had the highest content.Bermudagrass sod of sludge presented a relatively good physiological status and the peat group was only second to the sludge group.Then nutrient soil and nutrition soil: fly ash(1:1)were lower than CK.Therefore,according to the appearance quality and physiological indexes,thecomprehensive performance of turf growth,whether it is appearance quality evaluation or physiological and biochemical evaluation,sludge was the best turf substrate for Bermudagrass sod transplanting.What is more,the sludge is much cheaper,so it has higher economic benefits.Peat is second,but its price is expensive,which is not conducive to promote. |
PDF Full Text Request