【摘要】 为揭示海州露天煤矿排土场复垦区植物根系分布特征,文中结合根钻法和Win RHIZO根系分析系统对刺槐林地、榆树林地、灌木林地(紫穗槐)、荒草地0～50cm土层根系分布特征进行定量分析。结果表明:(1)各个样地根密度表现为灌木大于草本和乔木,0～10cm土层根密度在154. 99～1397. 48个/m2;根重密度表现为乔木大于草地和灌木,在0. 1218～0. 7076g/cm3之间。(2)各个样地根长密度和根表面积密度随土层增加而减少,表现为灌木大于草地和乔木。植物根系主要集中在0～40cm,其中根长占0～50cm的76. 5%～95. 1%,根表面积占0～50cm的73. 4%～98. 2%。(3)刺槐林地和榆树林地以径级<1mm和1～2mm为主,而灌木林地和荒草地以径级<1mm为主。更多还原

【Abstract】 To reveal the plant roots distribution characteristics in the dump reclamation area of Haizhou open pit coal mining,plant roots distribution characteristics at 0 ～ 50 cm soil layer were quantitative analyzed by using root drilling method and Win RHIZO root system analysis system for Robinia pseudoacacia land,Ulmus pumila land,shrub land( Amorpha fruticosa) and weeds land. The results showed that:(1) The root density in shrub land was larger than that of weeds land and arbor forest land,it was 154. 99 ～ 1397. 48 roots/m2 in 0 ～ 10 cm layer;the root weight density in arbor forest land was larger than that of weeds land and shrub land,it was 0. 1218 ～ 0.7076 g/cm3 in 0 ～ 10 cm layer.(2) The root length density and root surface area density of all plots decreased with the increase of depth of soil layers and showed that it in shrub land was larger than that of in weeds land and arbor forest land. The plant root of all plots was concentrated in 0 ～ 40 cm; the root length in 0 ～ 40 cm layer accounted for 76. 5% ～ 95. 1% of the 0 ～ 50 cm soil layer,and root surface area density accounted for 73. 4% ～98. 2% of the 0-50 cm layer.(3) The plant roots in Robinia pseudoacacia land and Ulmus pumila land were mainly < 1 mm and 1 ～ 2 mm in diameter,while the roots in shrub land and weeds land were mainly < 1 mm in diameter.更多还原