【摘要】 为探究植物根系与土壤优先路径之间的关系，以黑龙江省东部山地落叶松人工林为研究对象，采用染色示踪和Arc Map 10.4图像处理方法分析土壤优先路径分布特征，结合根长密度、根系生物量等根系指标，研究落叶松根系对土壤优先路径的影响。结果显示：落叶松人工林土壤优先流主要以指流和管流的形式存在，具有侧向入渗与环绕流的特征。落叶松人工林根系分布于0～40 cm土层范围内。根长密度随土层深度增加而减小，d<3 mm的根长密度贡献度高达95.22%。10～20 cm土层根系生物量总量高达3 789.115 g/m~3。1～10 mm径级的根系特征与染色面积百分比的相关性较好。落叶松人工林1～10 mm径级的根系对于土壤优先路径的形成有一定的促进作用，其中3～5 mm径级的根系在土壤优先路径形成过程中起重要作用。更多还原

【Abstract】 To investigate the relationship between plant root systems and soil priority paths, the stain tracing and Arc Map 10.4 image processing methods were used to obtain the distribution characteristics of soil priority paths.Combined with root length density and root biomass, the influence of Larix gmelinii plantation roots on soil priority paths was studied.The results showed that soil preferential flow in L.gmelinii plantations mainly existed in the form of finger flow and pipe flow, accompanied by encircling and lateral infiltration characteristics.The root system of L.gmelinii plantation is distributed in the range of 0-40 cm soil layer.Root length density decreased with the increasing of soil depth.The contribution of d< 3 mm for root length density was as high as 95.22%.The total root biomass was 3 789.115 g/m~3 in 10-20 cm soil layer.The correlation between root biomass and percentage of stained area was significant and positive.The root system of 1-10 mm diameter in L.gmelinii plantation had a certain role in promoting the formation of priority paths.And the root system of 3-5 mm diameter played an important role in the formation of priority paths in soil.更多还原