摘要
对28种沙与泥炭按75：25混配而成的高尔夫果岭坪床材料的物理特性进行了评价。不同类型沙的粒径、均一性和形状有所不同。高尔夫果岭坪床的物理特性主要取决于所使用的沙的特性。对沙＋泥炭混配的坪床来说，其导水率在95～827mm／h范围内变化，总孔隙度变化范围为38．8％～47．2％，而通气孔隙度（在-3kPa水势下）为0．9％～24．6％，毛管孔隙度（在-3kPa水势下）为17．7％～42．1％。结果表明，排水速率和通气孔隙度与毛管孔隙度的平衡主要受沙的粒径大小的影响。起决定作用的是粒径最大和最小的沙所占的比例，而容重、总孔隙度和抗剪切强度取决于沙的均一性。当沙粒较圆且较为光滑时，坪床材料孔隙度趋向减少。沙表面越粗糙，坪床抗剪切能力就越强。而沙对坪床硬度的作用不显著。
The physical properties of golf green rootzone mixes were evaluated using twenty-eight different sand materials mixed with peat. The particle size, uniformity of grain size distribution and shape of grain varied with sand types. The physical properties of the mixes were determined by the sand used. For the 75/25 sand/peat mixes, hydraulic conductivity changed from 95 to 827 mm/h, total porosity（at -3 kPa matric potential） from 38.8% to 47.2%, air-filled porosity （at -3 kPa matric potential） from 0.9% to 24.6% ,and capillary porosity from 17.7% to 42.1%. Drainage rates and the balance between air-filled and capillary pore space primarily depended on sand size, while bulk density, total porosity and shear strength mainly depended on the uniformity of the grain size distribution. Rootzone mixes tended to have less pore space when grains were more rounded and more spherical. The more spherical the sand, the more shear strength of rootzone mixes. Sand types did not significantly influence the hardness of rootzones.
出处
《草业学报》
CSCD
2007年第2期99-104,共6页
Acta Prataculturae Sinica
基金
华南农业大学校长基金项目(4100-K05141)资助
关键词
沙
物理特性
坪床材料
高尔夫果岭
sand
physical property
rootzone mixes
golf green
