Zhang Yang, Li Cheng-Yuan, Han Shao-Jie, Chen Xiang-Wei
College of Fores-try, Northeast Forestry University, Harbin 150040, China.
Ying Yong Sheng Tai Xue Bao. 2021 May;32(5):1726-1734. doi: 10.13287/j.1001-9332.202105.003.
To explore root architecture and its effects on soil reinforcement of main tree species in typical black soil region, we measured root spatial distribution characteristics, root fractal characte-ristics, and geometric morphological characteristics of , , , , , var, using whole root excavation method and WinRHIZO Pro LA2004 root analysis system. All the examined species are distributed widely in typical black soil region. The vertical uprooting force was determined by uprooting tests. The results showed that inclined roots were dominant in , horizontal roots were dominant in , , and , and the horizontal and vertical distribution of roots were commensurable in var. Except for the total root surface area of and the total root length of , the total root length and root surface area of shrub species were significantly greater than those of arbor species, while deciduous broad-leaved trees were significantly larger than coniferous evergreen trees. The total root volume of was significantly larger than that of , , and var. The root fractal dimension and abundance of , , were significantly higher than those of and var. The average maximum uprooting force of , , and was significantly higher than that of , , and var. Due to the role of total root length, total root surface area and the number of inclined roots, root system of , and showed strong soil reinforcement capacity. , and could be used as the option-preferred tree species when constructing soil and water conservation vegetation in typical black soil region.
为探究典型黑土区主要树种的根系构型及其对土壤加固的影响，我们采用全根挖掘法和WinRHIZO Pro LA2004根系分析系统，测量了兴安落叶松、樟子松、水曲柳、胡桃楸、黄菠萝、蒙古栎变种的根系空间分布特征、根系分形特征和几何形态特征。所有受试树种均广泛分布于典型黑土区。通过拔根试验测定垂直拔根力。结果表明，兴安落叶松中倾斜根占主导，樟子松、水曲柳和胡桃楸中水平根占主导，蒙古栎变种中根系的水平和垂直分布相当。除兴安落叶松的总根表面积和樟子松的总根长外，灌木树种的总根长和根表面积显著大于乔木树种，而落叶阔叶树显著大于常绿针叶树。黄菠萝的总根体积显著大于兴安落叶松、樟子松、水曲柳和蒙古栎变种。兴安落叶松、水曲柳和胡桃楸的根系分形维数和丰度显著高于樟子松和蒙古栎变种。兴安落叶松、水曲柳和胡桃楸的平均最大拔根力显著高于樟子松、黄菠萝和蒙古栎变种。由于总根长、总根表面积和倾斜根数量的作用，兴安落叶松、水曲柳和胡桃楸的根系表现出较强的土壤加固能力。在典型黑土区构建水土保持植被时，兴安落叶松、水曲柳和胡桃楸可作为优先选择的树种。
