四种暖季型草坪草的固土性能研究

Soil-reinforcement performance of four kinds of warm-season turfgrasses root network

对4种暖季型草坪草的固土性能进行了力学试验比较。对根系抗拉强度和土壤抗剪强度进行测定,结果表明:不同草坪草根系具有不同的抗拉强度,百喜草根系平均抗拉强度34.64 MPa>假俭草27.58 MPa>狗牙根26.31MPa>结缕草22.82 MPa;不同坡度与植物种类影响着根系对土体抗剪强度的强化作用;运用加权平均法综合评价分析4种暖季型草坪草土体抗剪强度,排序为百喜草>假俭草>结缕草>狗牙根。

A mechanical test on soil-reinforcement performance of four kinds of warm-season turfgrass was carried out, the tensile strength and shear strength of roots system of four warm-season turfgrass were measured. The tension test results reveal that different roots had different tensile strength, and the avrage tension strength of four kinds of warm season turfgrass were proioritized from high to low as follows： Bahia grass 34. 64 MPa〉Common Cetipede grass 27.58 MPa〉Bermuda grass 26.31 MPa〉Zoysia 22.82 MPa; the soil shere test shows that different gradient and species can directly affect the strengthening action of roots syatem on shere strength. A comprehensive evaluation with weighted average method was used to analyze the shere strength of four warm--season turfgrass, and the results indicate that the order from high to low is Bahia grass〉Common Cetipede grass〉Bermuda grass〉Zoysia.