草地学报

草地学报 ›› 2023, Vol. 31 ›› Issue (2): 448-455.DOI: 10.11733/j.issn.1007-0435.2023.02.018

• 研究论文 • 上一篇    

践踏对2种草坪草土壤物理性质与根系的影响

薛建1, 邢强2, 成文竞3   

  1. 1. 上海国际主题乐园有限公司, 上海 201205;
    2. 上海辰山植物园, 上海 201602;
    3. 上海农林职业技术学院, 上海 201699
  • 收稿日期:2022-08-29 修回日期:2022-10-07 发布日期:2023-02-28
  • 通讯作者: 成文竞,E-mail:chengwj@shafc.edu.cn
  • 作者简介:薛建(1983-),男,陕西咸阳人,工程师,主要从事开放式草坪管养研究,E-mail:xuelaer@126.com
  • 基金资助:
    上海农林职业技术学院中青年领军人才培养计划项目(A2-0265-22-17)；上海市科委科技创新行动计划(18DZ1204700)资助

Effects of Traffic on the Physical Properties of Lawn Soil and Roots of Two Turfgrasses

XUE Jian1, XING Qiang2, CHENG Wen-jing3   

  1. 1. Shanghai International Theme Park Co., Shanghai 201205, China;
    2. Shanghai Chenshan Botanical Garden, Shanghai 201602, China;
    3. Shanghai Vocational College of Agriculture and Forestry, Shanghai 201699, China
  • Received:2022-08-29 Revised:2022-10-07 Published:2023-02-28

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摘要： 以长三角地区常用的结缕草(Zoysia japonica'兰引3号')和杂交狗牙根(Cynodon dactylon×Cynodon transvadlensis 'Tifdwarf')为试验材料，基于公园不同客流量下的草坪土壤紧实度设置不同践踏强度，探索不同草坪草应对大客流的耐践踏特性及制定恢复措施的优先衡量指标。随践踏强度增加，2种草坪的表层土壤容重增加，孔隙度、通气度和持水量下降。其次，践踏显著降低了狗牙根的根生物量，重度践踏显著降低了其地上生物量，而结缕草表现出更强的应对各强度践踏胁迫时的能力，其地上生物量和根系构型特征分别在轻度和中度践踏时达到最大值。最后，草坪草的根长与地上生物量、根生物量、根体积、根投影面积均呈显著正相关，根体积与其余3个根系构型特征均呈显著正相关；进一步通过主成分分析发现，根体积、根投影面积和根长的重要值排在前3位，在草坪耐践踏评估及制定恢复措施时需加以考虑。

关键词: 游憩草坪, 践踏强度, 根系特征, 土壤物理性状, 生物量分配, 主成分分析

Abstract: Two turfgrasses commonly used in the Yangtze River Delta region,zoysiagrass (Zoysia japonica 'Lanyin No.3') and hybrid bermudagrass (Cynodon dactylon×Cynodon transvadlensis 'Tifdwarf') were used as experimental materials. Different traffic intensities were set according to the compactness of the lawn soil under different passenger flows in the park,to explore the traffic resistance of different turfgrasses in response to large passenger flows with the purpose of identify out some priority indicators for recovery measures on turfgrasses. With the increase of traffic intensities,the increase of bulk density,the decreases of porosity,aeration and water holding capacity of surface soil were found in both zoysiagrass and bermudagrass lawns. The root biomass of bermudagrass decreased significantly under all traffic intensities and its aboveground biomass decreased significantly under the heavy traffic intensity. However,zoysiagrass showed a stronger ability to cope with various traffic intensity stresses,its aboveground biomass and root configuration characteristics reached the maximum value at the light and moderate traffic intensity,respectively. The root length of turfgrasses showed a significant positive correlation with the aboveground biomass,root biomass,root volume and root projection area,and the root volume was significantly positively correlated with the other three root configuration features. Principal component analysis showed that the important values of root volume,root projection area and root length ranked in the top 3,which should be considered in the assessment of lawn traffic resistance and the development of recovery measures.

Key words: Recreational lawn, Traffic intensity, Root system characteristics, Soil physical properties, Biomass allocation, Principal component analysis

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