Effect of Soil Matrix Improvement Measure on Erosion Resistance of Purple Soil During Vegetation Restoration in Southern Hunan Province, China

FAN Shicai; FANG Xi; WANG Zhenpeng; CHEN Jinlei

doi:10.13870/j.cnki.stbcxb.2021.06.004

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Effect of Soil Matrix Improvement Measure on Erosion Resistance of Purple Soil During Vegetation Restoration in Southern Hunan Province, China

更新时间：2025-03-12

- Effect of Soil Matrix Improvement Measure on Erosion Resistance of Purple Soil During Vegetation Restoration in Southern Hunan Province, China
- Vol. 35, Issue 6, Pages: 22-30(2021)
- 作者机构：
  
  1. 中南林业科技大学生命科学与技术学院,长沙,410004
  2. 湖南会同杉木林生态系统国家野外科学观测研究站, 湖南会同,438107
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2021.06.004
  CLC： S157.9
- Published：2021
- 稿件说明：
移动端阅览
FAN Shicai, FANG Xi, WANG Zhenpeng, et al. Effect of Soil Matrix Improvement Measure on Erosion Resistance of Purple Soil During Vegetation Restoration in Southern Hunan Province, China[J]. 2021, 35(6): 22-30.
DOI：

FAN Shicai, FANG Xi, WANG Zhenpeng, et al. Effect of Soil Matrix Improvement Measure on Erosion Resistance of Purple Soil During Vegetation Restoration in Southern Hunan Province, China[J]. 2021, 35(6): 22-30. DOI： 10.13870/j.cnki.stbcxb.2021.06.004.

摘要

为评价植被恢复过程土壤基质改良对紫色土抗蚀性的影响，在湖南南部耒阳山地紫色土进行土壤基质改良试验，测定土壤基质未经处理（对照地）、表层与底层土置换（土层置换地）、表层与底层土置换并添加有机物改良剂（基质改良地）的紫色土0—10，10—20 cm土层13个抗蚀性评价指标，运用相关性分析和主成分分析方法筛选影响紫色土抗蚀性的主要指标，建立综合评价模型评价紫色土不同土壤基质处理后的抗蚀性。结果表明：（1）与对照地相比，基质改良地0—10，10—20 cm土层有机碳含量、抗蚀指数、> 0.25 mm湿筛团聚体、> 0.5 mm湿筛团聚体、<0.002 mm黏粒含量、湿筛团聚体平均重量直径、湿筛团聚体几何平均直径、结构性颗粒指数、团聚状况分别增加69.19%~99.81%，9.72%~46.86%，41.69%~50.80%，47.26%~58.98%，73.82%~194.35%，47.96%~57.01%，49.06%~68.97%，74.23%~183.25%，14.62%~20.16%，土壤容重、湿筛团聚体分形维数、结构破坏率分别降低10.53%~16.26%，4.64%~7.58%，39.22%~54.64%；（2）土壤容重、有机碳含量、湿筛团聚体含量及其稳定性是影响紫色土抗蚀性的主要因子；（3）与对照地相比，基质改良地0—10，10—20 cm土层抗蚀性综合指数分别提高524.14%，146.99%，土层置换地分别提高93.10%，42.17%，表明植被恢复过程中土壤基质改良不仅提高土壤有机碳含量，也显著提高土壤抗蚀性，可作为治理湖南南部紫色土水土流失的有效措施。

Abstract

In order to evaluate the effect of soil matrix improvement on soil erosion resistance during vegetation restoration of purple soil

relevant experiments were carried out in the purple soil area of Leiyang in south Hunan Province

China. Three soil matrix types were chosen in our study

including the untreated purple soil matrix (control land)

the purple soil of interchanging topsoil with subsoil (soil replacement land)

and the one added organic improver based on the soil replacement land (soil matrix improved land). Thirteen erosion resistance evaluation indexes were determined

the important indexes were screened out and an evaluation model was established to study the change of erosion resistance of purple soil substrate after soil matrix improvement

using the correlation analysis and the principal component analysis. The results showed that: (1) Compared with the control land

the organic carbon content

erosion resistant index

> 0.25 mm wet sieve aggregate content

> 0.5 mm wet sieve aggregate content

<0.002 mm clay percentage content

mean weight diameter of wet sieve aggregate

geometric mean diameter of wet sieve aggregate

structural granular index and aggregation condition in 0—10 and 10—20 cm soil layer increased by 69.19%~99.81%

9.72%~46.86%

41.69%~50.80%

47.26%~58.98%

73.82%~194.35%

47.96%~57.01%

49.06%~68.97%

74.23%~183.25%

and 14.62%~20.16% in the soil matrix improved land

respectively. On the contrary

soil bulk density

fractal dimension of wet sieve aggregate and structural failure rate decreased by 10.53%~16.26%

4.64%~7.58%

and 39.22%~54.64%

respectively. (2) Soil bulk density

organic carbon content and wet sieve aggregate content and stability were the main factors affecting the erosion resistance of purple soil. (3) Compared with the control land

the composite index of soil erosion resistance in 0—10 and 10—20 cm soil layer in the soil matrix improved land was significantly increased by 524.14% and 146.99%

respectively

and the one in the soil replacement land was increased by 93.10% and 42.17%

respectively. The results showed that the soil matrix improvement during vegetation restoration not only increased the organic carbon content of purple soil

but also significantly improved the soil erosion resistance

and this method can be used as an effective measure to control soil erosion in purple soil.

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