Characteristics of a Typical Tamarix Hohenackeri Shrub Resource Island in Qaidam Basin Under Prevailing Wind

Gao Siyuan; Cao Guangchao; Diao Erlong; He Qixin; Cheng Mengyuan; Qiu Xunxun; Cheng Guo; Zhao Meiliang

doi:10.13961/j.cnki.stbctb.2022.04.037

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Characteristics of a Typical Tamarix Hohenackeri Shrub Resource Island in Qaidam Basin Under Prevailing Wind

- Characteristics of a Typical Tamarix Hohenackeri Shrub Resource Island in Qaidam Basin Under Prevailing Wind
- Bulletin of Soiland Water Conservation Vol. 42, Issue 4, Pages: 293-300(2022)
- 作者机构：
  
  1. 青海师范大学地理科学学院,青海,西宁,810008
  2. 青海省自然地理与环境过程重点实验室,青海,西宁,810008
  3. 青藏高原地表过程与生态保育教育部重点实验室,青海,西宁,810008
  4. 青海省人民政府-北京师范大学高原科学与可持续发展研究院,青海,西宁,810008
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2022.04.037
  CLC： Q948
- Published：2022
- 稿件说明：
移动端阅览
Gao Siyuan, Cao Guangchao, Diao Erlong, et al. Characteristics of a Typical Tamarix Hohenackeri Shrub Resource Island in Qaidam Basin Under Prevailing Wind[J]. Bulletin of Soiland Water Conservation, 2022, 42(4): 293-300.
DOI：

Gao Siyuan, Cao Guangchao, Diao Erlong, et al. Characteristics of a Typical Tamarix Hohenackeri Shrub Resource Island in Qaidam Basin Under Prevailing Wind[J]. Bulletin of Soiland Water Conservation, 2022, 42(4): 293-300. DOI： 10.13961/j.cnki.stbctb.2022.04.037.

摘要

[目的] 探究盛行风作用下柴达木盆地诺木洪地区典型多花柽柳(Tamarix hohenackeri)灌丛资源岛特征，旨在深入了解在类似的生境下柽柳灌丛的生态学意义，为盐碱地改良和荒漠—绿洲的生态保护提供借鉴。[方法] 通过对柴达木盆地诺木洪地区荒漠—绿洲过渡带典型多花柽柳灌丛周围土壤系统采样，全面了解冠下、冠缘和间地110 cm深不同土层土壤有机碳(SOC)、土壤含水率(SMC)、土壤pH和EC值特征，探讨盛行风对灌丛资源岛的影响。[结果] ①典型多花柽柳灌丛周围，冠下枯落物和地下生物量显著大于冠缘和间地，SOC含量在冠下显著大于冠缘，具有资源岛特征； ②盛行风背风向冠下SMC、冠缘和间地SOC含量显著大于其他方向，且冠缘0—5 cm土层有着较低的土壤pH值； ③背风向地上生物量和冠缘枯落物量显著大于其他方向，减少了水分蒸发，促进了SOC的增加。[结论] 柴达木盆地荒漠—绿洲过渡带多花柽柳灌丛周围土壤不仅冠下具有资源岛特征，且背风向土壤会形成更适合植物生长的SMC，SOC含量和较低土壤pH值，即风影区资源岛。

Abstract

[Objective] The characteristics of a typical Tamarix hohenackeri shrub resource island in Nuomuhong area of Qaidan Basin under the action of prevailing winds were studied in order to deeply understand the ecological significance of tamarisk shrubs in similar habitats

and to provide a reference for saline-alkali land improvement and ecological protection of desert-oases.[Methods] Measurements of soil organic carbon (SOC)

soil moisture content (SMC)

soil pH value

and EC values in different soil layers to a depth of 110 cm at positions under the canopy

at the edge of the canopy

and in open areas were made by systematically sampling the soil surrounding typical tamarisk shrubs in the desert-oasis transition zone in the Nuomuhong area of the Qaidam Basin.[Results] ① The litter and underground biomass around the shrub and under the canopy were significantly greater than at the edge of the canopy in the open space. SOC under the canopy was significantly greater than at the canopy edge

exhibiting the characteristics of a resource island; ② SMC under the canopy in the leeward direction and SOC of the leeward canopy edge and open space were significantly greater than in other directions

and the soil pH values of the 0-5 cm soil layer at the canopy edge were lower; ③ The aboveground biomass and litter at the edge of the canopy were significantly greater in the leeward direction than in other directions

which in turn reduced water evaporation and increased SOC.[Conclusion] The soil around the shrub not only exhibited the characteristics of a resource island under the canopy

but also resulted in SMC

SOC contents

and lower soil pH value that were more suitable for plant growth in the leeward direction

and therefore could be called a resource island in the wind shadow area.

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