Relationship Between Herbaceous Plant Diversity and Soil Factors at a Gully Head After Revegetation in Baicao Tableland

Chen Zhuoxin; Guo Mingming; Wang Wenlong; Feng Lanqian; Lou Yibao; Zhu Yanan; Yang Hao

doi:10.13961/j.cnki.stbctb.2023.04.007

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Relationship Between Herbaceous Plant Diversity and Soil Factors at a Gully Head After Revegetation in Baicao Tableland

- Relationship Between Herbaceous Plant Diversity and Soil Factors at a Gully Head After Revegetation in Baicao Tableland
- Bulletin of Soiland Water Conservation Vol. 43, Issue 4, Pages: 53-60(2023)
- 作者机构：
  
  1. 中国科学院教育部水土保持与生态环境研究中心, 陕西杨凌,712100
  2. 中国科学院水利部水土保持研究所, 陕西杨凌,712100
  3. 中国科学院大学,北京,100049
  4. 中国科学院东北地理与农业生态研究所黑土区农业生态院重点实验室,黑龙江,哈尔滨,150081
  5. 西北农林科技大学水土保持研究所, 陕西杨凌,712100
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2023.04.007
  CLC： S153.16
- Published：2023
- 稿件说明：
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Chen Zhuoxin, Guo Mingming, Wang Wenlong, et al. Relationship Between Herbaceous Plant Diversity and Soil Factors at a Gully Head After Revegetation in Baicao Tableland[J]. Bulletin of Soiland Water Conservation, 2023, 43(4): 53-60.
DOI：

Chen Zhuoxin, Guo Mingming, Wang Wenlong, et al. Relationship Between Herbaceous Plant Diversity and Soil Factors at a Gully Head After Revegetation in Baicao Tableland[J]. Bulletin of Soiland Water Conservation, 2023, 43(4): 53-60. DOI： 10.13961/j.cnki.stbctb.2023.04.007.

摘要

[目的] 探究黄土塬沟头在植被恢复后的草本植物多样性变化与土壤因子间的关系，为该区沟头水土保持效益评估提供科学依据。[方法] 以农地沟头为对照，选择不同植被恢复年限(5，13，18，22 a)的白草塬草地沟头，调查和测定了各植被恢复年限沟头的草本植物多样性和表层土壤(0—10 cm和10—25 cm)的土壤性质因子。[结果] 随植被恢复年限的增长，Patrick丰富度指数呈现先增大后稳定的变化趋势；Shannon-Wiener指数呈现持续上升的趋势，植被恢复18 a和22 a时的Shannon-Wiener指数高于恢复13 a，但没有显著性差异；Pielou均匀度指数呈现增加—降低—再增加的波动趋势，且在恢复22 a时达到最大值(0.89)。白草塬沟头0—10 cm和10—25 cm的土壤容重均在恢复22 a时达到最小值，较农地分别显著降低13.1%和17.8%(p＜0.05)；0—10 cm和10—25 cm的土壤有机质含量、水稳性团聚体含量、团聚体平均重量直径和饱和导水率均随植被恢复年限的增加而显著增加，两土层的土壤因子在各植被恢复年限上呈现出显著性差异。相关性分析显示草本植物多样性指标与容重间呈负相关关系，与土壤有机质、水稳性团聚体、团聚体平均重量直径以及饱和导水率呈显著正相关(p＜0.05)。冗余分析表明土壤团聚体含量与草本植物多样性变化密切相关。[结论] 植被恢复显著提高了沟头草本植物多样性，可改善表层土壤性质，在稳固沟头过程发挥重要作用。

Abstract

[Objective] The changes in herbaceous plant diversity and the factors influencing those changes after revegetation at a gully head were studied in order to provide a relevant foundation for the assessment of the benefits of soil and water conservation in the loess tableland. [Methods] Herbaceous plant diversity at a gully head was measured and soil property indexes related to the topsoil (0—10 cm and 10—25 cm) were determined by selecting grassland gully heads with vegetation restoration periods of 5

and 22 years in the Baicao Tableland. Farmland was used as the control. [Results] The Patrick richness index initially increased with increasing number of vegetation restoration years

and then stabilized. The Shannon-Wiener index showed a continuously increasing trend

and the Shannon-Wiener index values in 18 and 22 years of vegetation restoration were greater than at 13 years of restoration. However

the differences were not significantly different. The Pielou evenness index exhibited a fluctuating trend of increasing

and then decreasing

then increasing again

reaching a maximum value (0.89) in 22 years of recovery. The soil bulk density in both the 0—10 cm and 10—25 cm layers reached a minimum value in 22 years of recovery

with significant decreases of 13.1% and 17.8%

respectively

compared with values observed for farmland (p＜0.05). The soil organic matter content

water-stable aggregate content

mean weight diameter of aggregates

and saturated hydraulic conductivity in the 0—10 cm and 10—25 cm layers significantly increased with increasing number of vegetation restoration years

and soil factors between the two soil layers demonstrated significant differences at each restoration year. Correlation analysis indicated a negative correlation between herbaceous plant diversity indicators and soil bulk density

and a significant positive correlation (p＜0.05) with soil organic matter content

water-stable aggregate content

mean weight diameter of aggregates

and saturated hydraulic conductivity. Redundancy analysis revealed that soil aggregate content was an important factor in explaining herbaceous plant diversity variation. [Conclusion] Vegetation restoration could significantly increase herbaceous plant diversity

and could play an important role in improving soil properties at a gully head in the loess tableland.

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references

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