高级检索
    张晓, 黄晓强, 信忠保, 孔庆仙, 夏晓平, 蒋秋玲. 北京山区不同林分林下植被根系分布特征及其影响因素[J]. 北京林业大学学报, 2018, 40(4): 51-57. DOI: 10.13332/j.1000-1522.20170399
    引用本文: 张晓, 黄晓强, 信忠保, 孔庆仙, 夏晓平, 蒋秋玲. 北京山区不同林分林下植被根系分布特征及其影响因素[J]. 北京林业大学学报, 2018, 40(4): 51-57. DOI: 10.13332/j.1000-1522.20170399
    Zhang Xiao, Huang Xiaoqiang, Xin Zhongbao, Kong Qingxian, Xia Xiaoping, Jiang Qiuling. Distribution characteristics and its influencing factors of understory vegetation roots under the typical plantations in mountainous area of Beijing[J]. Journal of Beijing Forestry University, 2018, 40(4): 51-57. DOI: 10.13332/j.1000-1522.20170399
    Citation: Zhang Xiao, Huang Xiaoqiang, Xin Zhongbao, Kong Qingxian, Xia Xiaoping, Jiang Qiuling. Distribution characteristics and its influencing factors of understory vegetation roots under the typical plantations in mountainous area of Beijing[J]. Journal of Beijing Forestry University, 2018, 40(4): 51-57. DOI: 10.13332/j.1000-1522.20170399

    北京山区不同林分林下植被根系分布特征及其影响因素

    Distribution characteristics and its influencing factors of understory vegetation roots under the typical plantations in mountainous area of Beijing

    • 摘要:
      目的通过野外调查和室内试验分析林下植被生物量以及根系特征,为北京土石山区人工造林树种的选择和植被恢复提供科学依据。
      方法在北京土石山区典型代表红门川流域,以油松和侧柏林下植被为研究对象,采用样方法进行植被调查,测定林下植被生物量和根系,草本和灌木生物量采用全刈法,根系调查采用连续钻取土芯法。
      结果结果表明:不同树种林地根系生物量差异显著(P < 0.05),灌丛林地根系生物量最高((6.84±1.35) t/hm2),其次为侧柏((4.65±0.90) t/hm2),油松林地土壤根系生物量最低((3.33±0.93) t/hm2),且同一林地根系生物量在不同土层均基本接近;不同树种林地根长密度和根表面积密度均随径级的增大而减小,0~0.1 mm径级根系是林地根系分布最广的,其次为0.1~0.2 mm径级的根系;随林龄增大,侧柏、油松林不同径级根长密度、根表面积密度和根系生物量均呈递减趋势,且均明显低于灌丛林地;坡向显著影响林地根系生物量,半阴坡根系生物量明显大于阳坡和阴坡根系生物量(P < 0.05),林地根长密度和根表面积密度与砂粒含量显著性负相关(P < 0.05),其中径级0~0.1 mm和0.2~0.5 mm根系尤为明显,根系生物量与土壤密度间显著负相关(P < 0.05),尤其是径级0.2~0.5 mm根系。
      结论研究结果表明对土石山区造林树种的选取不仅要参考当地环境条件和土壤特征,还要充分考虑造林树种的生长特性。

       

      Abstract:
      ObjectiveBy studying the vegetation biomass and root characteristics through the field investigation and laboratory tests, the study can provide scientific basis for the selection of afforestation tree species and the restoration of vegetation in Beijing soil stone mountain area.
      Method Regarding the chronosequence of Pinus tabuliformis plantation (35, 40 and 57 years old) and Platycladus orientalis plantation (20, 40, 57 and 100 years old), which located at the Hongmengchuan Catchment in the northeast of Miyun County of Beijing, using full mow and drying method hold the undergrowth plant biomass, using the root auger drilling core, which will be back to the indoor soil core samples, the water immersion, rinse clean, using a magnifying glass, scissors, tweezers and other tools manual pick out root system, analyzing the characteristic of the root system, this study researched the distribution characteristics and influencing factors of roots under different plantations.
      ResultThe results showed that: the mean root biomass differed significantly among the natural shrub, Pinus tabuliformis and Platycladus orientalis plantation, the highest ((6.84±1.35) t/ha) root biomass was found in natural shrub land, followed by Platycladus orientalis plantation ((4.65±0.90) t/ha), and Pinus tabuliformis plantation ((3.33±0.93) t/ha), the root biomass showed the same regularity in different soil layers in varied forestlands. Root length density, root surface area density decreased gradually with diameter increased, 0-0.1 mm diameter root was most widely distributed in forestland, followed by 0.1-0.2 mm diameter root. Different diameter root length density, root surface area density and root biomass decreased with the increasing stand age in Platycladus orientalis and Pinus tabuliformis forest, but they were significantly lower than nature shrub. The aspect had an important impact on root biomass, root biomass of half shady slope was significantly higher than that of sunny slope and shady slope (P < 0.05). Root length density and root surface area density had a significant negative correlation with sand content (P < 0.05), 0-0.1 mm and 0.2-0.5 mm diameter root were particularly evident; root biomass also had a significant negative correlation with soil bulk density (P < 0.05), especially 0.2-0.5 mm diameter root.
      Conclusion The study revealed the root characteristics and their influencing factors and the results indicate that the selection of afforestation tree in soil and stone mountain should not only refer to local environmental conditions and soil characteristics, but also consider the growth characteristics of afforestation tree.

       

    /

    返回文章
    返回