Evaluation on Soil Quality Changes due to Land from Hill Cutting in Beishan Mountain in Lanzhou City

Ren Xiuzi; Wang Long; Xu Xuexuan; Zhang Lianke

doi:10.13961/j.cnki.stbctb.2023.04.008

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Evaluation on Soil Quality Changes due to Land from Hill Cutting in Beishan Mountain in Lanzhou City

- Evaluation on Soil Quality Changes due to Land from Hill Cutting in Beishan Mountain in Lanzhou City
- Bulletin of Soiland Water Conservation Vol. 43, Issue 4, Pages: 61-67(2023)
- 作者机构：
  
  1. 西北农林科技大学草业与草原学院, 陕西杨凌,712100
  2. 北京良乡蓝鑫水利工程设计有限公司,北京,102488
  3. 中国科学院水利部水土保持研究所, 陕西杨凌,712100
  4. 甘肃省科学院地质自然灾害防治研究所,甘肃,兰州,730000
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2023.04.008
  CLC： S157.2
- Published：2023
- 稿件说明：
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Ren Xiuzi, Wang Long, Xu Xuexuan, et al. Evaluation on Soil Quality Changes due to Land from Hill Cutting in Beishan Mountain in Lanzhou City[J]. Bulletin of Soiland Water Conservation, 2023, 43(4): 61-67.
DOI：

Ren Xiuzi, Wang Long, Xu Xuexuan, et al. Evaluation on Soil Quality Changes due to Land from Hill Cutting in Beishan Mountain in Lanzhou City[J]. Bulletin of Soiland Water Conservation, 2023, 43(4): 61-67. DOI： 10.13961/j.cnki.stbctb.2023.04.008.

摘要

[目的] 评价兰州市北山削山造地引起的土壤质量变化，旨在为该区削山造地工程和生态效益评价提供科学依据和建议。[方法] 选择兰州市城关区北山原有耕地、林地、草地、削山产生的新造地4种土地利用方式，采集土壤物理性质、化学性质和根系生物量样品，基于主成分分析法(principal component analysis， PCA)筛选出最小数据集(minimum data set， MDS)，通过土壤质量指数对兰州市北山土壤质量进行评价。[结果] ①基于包括12项理化指标的土壤质量全数据集(total data set， TDS)的主成分分析，构建了由容重、速效磷、速效钾、全氮、pH值组成的最小数据集。②兰州市北山4种土地利用方式下土壤质量指数排序为：耕地＞林地＞新造地＞草地，削山造地显著影响了土壤的水分保持、有机质积累、全氮、速效钾含量等。③最小数据集和全数据集之间相关性系数为0.66，最小数据集能够较好地进行土壤质量评价(p＜0.01)。[结论] 兰州市北山的耕地和林地具有更好的土壤质量，新造地土壤的持水与积累养分能力低于原有耕地和林地，是未来植被恢复和重建的重点区域。削山造地时应尽量安排在草地上进行，注意对原有耕地和林地的保护。

Abstract

[Objective] The soil quality changes caused by land from hill citting in Beishan Mountain in Lanzhou City were assessed in order to provide a scientific basis and suggestions for land-cutting and land-reclamation projects and ecological benefit evaluation in this area. [Methods] We selected four land use types for evaluation: original cultivated land

forest land

grassland

and newly reclaimed land created by mountain cutting in Beishan Mountain of Chengguan District

Lanzhou City. We collected soil physical properties

chemical properties

and root biomass samples. We screened the minimum data set based on principal component analysis (PCA)

and evaluated the soil quality of Beishan Mountain through the soil quality index. [Results] ① Based on the principal component analysis of the full data set of soil quality (including 12 physical and chemical indicators)

a minimum data set consisting of bulk density

available phosphorus

available potassium

total nitrogen

and pH value was constructed. ② Soil quality index for the four land use types followed the order of cultivated land＞forest land＞newly reclaimed land＞grassland. Hill cutting significantly affected soil water conservation

organic matter accumulation

total nitrogen

available potassium

etc. ③ The correlation coefficient between the minimum data set and the full data set was 0.66

and the minimum data set better evaluated soil quality (p＜0.01). [Conclusion] Cultivated land and forest land in Beishan Mountain had better soil quality than grassland and newly reclaimed land. Water holding capacity and nutrient accumulation capacity of newly reclaimed land was lower than that of cultivated land and forest land

which is a key area for future vegetation restoration and reconstruction. Land cutting on mountains should take place on grasslands as far as possible

and attentions should be given to the protection of original cultivated land and forest land.

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