拉林公路边坡植被特征及土壤养分分析

Investigation on Vegetation Characteristics and Soil Nutrients of Lalin Highway Slope

通过调查拉林公路林芝市巴宜区至百巴路段边坡植被和土壤养分含量,对坡向(阳坡和阴坡)和不同坡度(<30°)下各指标的变化规律进行了分析。结果表明,阴坡不同坡度干草产量显著高于阳坡。随着边坡坡度的增加土壤全磷含量显著下降,阳坡土壤pH值均呈现逐渐升高的趋势,阴坡土壤有机质和速效钾含量呈明显的下降趋势,其他养分指标的变化规律不明显。土壤养分含量是影响植被特征指标的主要因素,在该地段护坡养护措施中应综合补充肥料,及时提高土壤中氮素含量,维持土壤肥力,保持水土,更好的发挥边坡绿化美观效果与生态价值。

By investigating the slope vegetation and soil nutrient content of Bayi district to Baiba section of Nyingchi City,Lalin Highway,the change law of each index was analyzed under slope aspect(sunny slope and shady slope)and different slope(<30°).The results were as follows:the hay yield of shady slope was significantly higher than that of sunny slope;with the increase of slope,soil total phosphorus content showed a significant decreasing trend,but soil pH value showed a gradual increasing trend on sunny slope,and soil organic matter and available potassium content showed a significant decreasing trend on shady slope,but the change law of other nutrient indexes was not obvious.Soil nutrient content is the main influencing factor of vegetation characteristics.Fertilizer should be comprehensively added in slope protection and maintenance measures in this section to timely increase soil nitrogen content,maintain soil fertility,conserve water and soil,and better play the aesthetic effect and ecological value of slope greening.