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[1]PAN Lu,TANG Lixia,ZHANG Qiaoyan,et al.Distribution Characteristics of Two Shrubs Roots in Heterogeneous Growth Space[J].Research of Soil and Water Conservation,2022,29(02):330-336+344.

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Distribution Characteristics of Two Shrubs Roots in Heterogeneous Growth Space

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 29 Number of periods: 2022 02 Page number: 330-336+344 Column: Public date: 2022-03-20

Title:: Distribution Characteristics of Two Shrubs Roots in Heterogeneous Growth Space

Author(s):: PAN Lu¹, TANG Lixia¹, ZHANG Qiaoyan², GUO Huan¹, RUAN Shihang¹; (1.College of Forestry, Guizhou University, Guiyang 550025, China; 2.Zhazuo Sate-owned Forest Farm of Guizhou Province, Guiyang 550025, China)

Keywords:: adaptation strategies; growth space; root biomass; Amorpha fruticosa; Lespedeza bicolor

CLC:: Q945; S718.51⁺9

DOI:: -

Abstract:: In order to explore the adaptation strategy of Amorpha fruticosa and Lespedeza bicolor roots in heterogeneous spaces, potted plant experiments were employed in this study. Different karst heterogeneous space conditions were simulated by placing different shapes of wooden boards in plant pot. The simulated spatial types include pore type, circular fracture type, strip fracture type and pore+rock barrier type. The root distribution characteristics of Amorpha fruticosa and Lespedeza bicolor under these spatial conditions were studied. The results show that:(1)all root indexes of Amorpha fruticosa and Lespedeza bicolor in heterogeneous spaces are higher than those in homogeneous spaces, which indicates that heterogeneous space can promote root growth; the root biomass of Lespedeza bicolor in heterogeneous space is significantly higher than that in homogeneous space, and the roots of Amorpha fruticosa and Lespedeza bicolor are most developed in pore type and circular crack type conditions;(2)the distribution characteristics of root biomass of Amorpha fruticosa and Lespedeza bicolor are affected by heterogeneous space; under heterogeneous situation, the root biomass of the two shrubs mainly concentrates in the 5—10 cm and 15—20 cm soils vertically, and within 3 cm around the plant stem horizontally; heterogeneous spatial shape has great influence on the horizontal distribution of root biomass of Amorpha fruticosa, especially in pore type and circular crack type;(3)the adaptation strategies of two shrubs in heterogeneous space are different; the adaptation strategy of Amorpha fruticosa roots in heterogeneous space is to find more space, while the adaptation strategy of Lespedeza bicolor roots in heterogeneous space is to occupy limited space. The growth of the root systems of Amorpha fruticosa and Lespedeza bicolor are affected by space, and the root systems of the two shrubs have different adaptation strategies in the growth space.

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Last Update: 2022-04-20