砒砂岩区三种沙棘根系特征与固土能力

卜繁靖; 郭月峰; 祁伟; 张燕; 王皓月; 祁慧娟

doi:10.13961/j.cnki.stbctb.20220525.001

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砒砂岩区三种沙棘根系特征与固土能力

试验研究

- 砒砂岩区三种沙棘根系特征与固土能力
- Root System Characteristics and Soil Consolidation Ability of Three Hippophae Rhamnoides Species in Feldspathic Sandstone Area
- 水土保持通报 2022年42卷第5期页码：41-48
- 作者机构：
  
  1. 内蒙古农业大学沙漠治理学院,内蒙古,呼和浩特,010010
  2. 内蒙古水利水电勘测设计院,内蒙古,呼和浩特,010020
  3. 鄂尔多斯市林业和草原调查勘验中心,内蒙古,鄂尔多斯,017000
- 作者简介：
- 基金信息：
  
  国家自然科学基金项目“内蒙古砒砂岩区沙棘平茬后林木根系与根际微环境的调节机制”(31960329);内蒙古自治区科技计划项目“生态脆弱区人工灌木林保护技术研发与示范”(2021GG0085)，“地区多功能树种选育及扩繁关键技术研究与示范项目”(2019GG004)
- DOI：10.13961/j.cnki.stbctb.20220525.001
  中图分类号： S714.7;S793.6
- 纸质出版：2022
- 稿件说明：
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卜繁靖, 郭月峰, 祁伟, 等. 砒砂岩区三种沙棘根系特征与固土能力[J]. 水土保持通报, 2022,42(5):41-48.

Bu Fanjing, Guo Yuefeng, Qi Wei, et al. Root System Characteristics and Soil Consolidation Ability of Three Hippophae Rhamnoides Species in Feldspathic Sandstone Area[J]. Bulletin of Soiland Water Conservation, 2022, 42(5): 41-48.
卜繁靖, 郭月峰, 祁伟, 等. 砒砂岩区三种沙棘根系特征与固土能力[J]. 水土保持通报, 2022,42(5):41-48. DOI： 10.13961/j.cnki.stbctb.20220525.001.

Bu Fanjing, Guo Yuefeng, Qi Wei, et al. Root System Characteristics and Soil Consolidation Ability of Three Hippophae Rhamnoides Species in Feldspathic Sandstone Area[J]. Bulletin of Soiland Water Conservation, 2022, 42(5): 41-48. DOI： 10.13961/j.cnki.stbctb.20220525.001.

摘要

[目的] 研究中国沙棘(Hippophae rhamnoides ssp.sinensis)、太阳沙棘(Hippophae rhamnoides ssp.taiyang)、乌兰沙林沙棘(Hippophae rhamnoides ssp.mongolica “Wulanshalin”)在砒砂岩区的根系分布特征及林下土壤抗蚀性特征，为改善当地生态环境提供新的树种选择。[方法] 在野外挖土壤剖面获取根土复合体，在室内进行根扫描及崩解试验。[结果] ①沙棘根系垂直分布规律大致相似。随土层深度的增加，根长、根体积逐步减少。根系主要分布在0—60 cm土层，占总根量比例分别为90.96%(中国沙棘)，83.38%(太阳沙棘)，74.93%(乌兰沙林沙棘)；粗根主要分布在0—40 cm土层。水平方向粗根主要分布在距根基0—20 cm的范围内，细根主要分布在20—100 cm范围内，且距根基越远细根含量越少，根系整体呈浅层化分布。②沙棘林下土壤崩解速度变化趋势基本一致。以0—20 cm表层土平均崩解速度最低。随着深度增加逐步增大，水平方向距根基部越远土壤平均崩解速度越大。土壤崩解速度表现为：中国沙棘(3.18 g/s)＞太阳沙棘(1.27 g/s)＞乌兰沙林沙棘(1.21 g/s)。③土壤崩解速度与沙棘根系分布有显著相关关系。垂直方向上受到粗根和细根的共同影响，水平方向主要受到细根的影响，细根对固持水土的作用更大。[结论] 太阳沙棘的根系含量高于乌兰沙林沙棘，且根系分布特征和林下土壤崩解速度变化规律联系更密切，更适用于砒砂岩区的水土流失防治工作。

Abstract

[Objective] The root distribution characteristics of Hippophae rhamnoides ssp. sinensis

Hippophae rhamnoides ssp. taiyang

and H. rhamnoides ssp. mongolica “Wulanshalin” in a feldspathic area

and the characteristics of soil erosion resistance under the forests were analyzed in order to provide new tree species options for improving the local ecological environment. [Methods] The soil profiles were excavated in the field to obtain the root-soil complexes

and the root scanning and disintegration test were performed indoors. [Results] ① The vertical distribution patterns of roots for the three seabuckthorn species were similar. Root length and root volume gradually decreased with increasing soil depth

and roots were mainly located in the 0—60 cm soil layer

accounting for 90.96% of the total root amount for H. rhamnoides ssp. sinensis

83.38% for H. rhamnoides ssp. taiyang

and 74.93% for H. rhamnoides ssp. mongolica “Wulanshalin”. Thick roots were mainly located in the 0—40 cm soil layer. The thick roots in the horizontal direction were mainly located in the range of 0—20 cm from the base of the plant

and the fine roots were mainly located in the range of 20—100 cm. The farther away from the base

the fewer the fine roots. The overall root system was distributed in a shallow layer. ② The change trend of soil disintegration rate under the H. rhamnoides forest was basically the same. The average disintegration rate of the surface soil at 0—20 cm was the lowest

and the rate gradually increased with increasing depth. In the horizontal direction

the farther away from the base of the plant

the greater the average disintegration rate of the soil. The soil disintegration rate followed the order of: H. rhamnoides ssp. sinensis (3.18 g/s)> H. rhamnoides ssp. taiyang (1.27 g/s)> H. rhamnoides ssp. mongolica “Wulanshalin” (1.21 g/s). ③ There was a significant correlation between soil disintegration rate and root distribution of seabuckthorn. In the vertical direction

it was affected by both coarse and fine roots

while in the horizontal direction

it was mainly affected by fine roots

which have a greater effect on soil and water retention. [Conclusion] The root content of H rhamnoides ssp. taiyang was higher than that of H rhamnoides ssp. mongolica “Wulanshalin”

and the root distribution characteristics were more closely related to the change law of soil disintegration rate under the forest

which is more suitable for soil erosion prevention and control in the soft sandstone area.

关键词

Keywords

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