7种混播组合对公路边坡土壤物理性质改善的比较

Comparisons of seven combinations of mixed planting in improvement of soil physical properties on the highway slope

从7种混播组合对土壤物理性质改善的短期效应表明,阴阳边坡组合中均为K6＋440和K6＋900对容重减小及孔隙度增大的影响效果明显;在加快土壤渗透性能方面,K6＋440-L和K6-R组合效果较好;阴阳边坡K6＋440及K6＋700混播组合在提高土壤抗冲、抗蚀性能方面效果较好,这与生长短期内直径为0.1~0.4 mm根系的含量有关。

The improvements of mixed planting on soil pmperdes of highway slope were studied. The resuits were that short period of the soil physical property improvement, on the northern and southern slope, the change rates of volumetric weight and soil porosity were higher in K6 ＋ 440 and K6 ＋ 900. In than other comtinafions quickening soil permeation aspect, the effects were better in K6 ＋ 440 - L and K6 - R thin others. The combination of K6 ＋ 440 and K6 ＋ 700 were effective in the soil anti - scourability and anti- erodibility aspects on the northern and southern slope. These were highly correlative to the roots biomass（0.1 - 0.4 mm） in short period.