伊犁地区公路边坡不同植物组合的水土保持效应研究——以S242线巩留至尼勒克公路建设为例

Soil and Water Conservation Effect of Different Plant Combinations on Highway Slope in Ili Region:A Case Study of S242 Gongliu to Nilka Highway

为了更好地治理伊犁地区公路建设中的水土流失问题,保护该地区的生态环境,依托S242线巩留至尼勒克公路路基边坡开展试验,通过土壤机械组成、土壤容重、土壤孔隙度、土壤抗冲性等指标对比分析了4种植物组合的水土保持效应。结果表明,经过1年试验,植物组合下的土壤质地由壤土转变为粉砂质壤土,土壤容重小幅减小,土壤孔隙度增加,土壤的抗冲性和抗蚀性得以提升,使得其土壤侵蚀量较裸坡对照小区明显减小,其中丙植物组合小区的土壤侵蚀量最小,水土保持效应相对最好。

In order to better control the soil erosion in highway construction, and protect the ecological en.vironment in Ili region, an experiment was carried out on the slope of S242 Gongliu to Nilka highway to an.alyze the effect of soil and water conservation of four plant combinations （A、B、C、D） by indicatorssuch as soil mechanical composition, soil bulk density, soil porosity, and erosion resistance. The resultsshowed that after one year′s experiment, the soil texture of the plant combination changed from loam tosilty loam, the soil bulk density decreased slightly, the porosity increased and the soil erosion resistanceand corrosion resistance increased, which means the soil erosion amount was significantly reduced com.pared with the bare slope. In comparison, the soil erosion of C plant combination is the smallest, so its soiland water conservation effect is relatively the best.