Performance of Artificially Transplanted Biocrusted Soil-surfaces in Rainwater Harvesting and Their Capability to Resist Erosion in the Hilly Region of Chinese Loess Plateau

CHEN Junru; JIANG Zihao; XIAO Bo; DOU Weiqiang

doi:10.13870/j.cnki.stbcxb.2024.03.038

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Performance of Artificially Transplanted Biocrusted Soil-surfaces in Rainwater Harvesting and Their Capability to Resist Erosion in the Hilly Region of Chinese Loess Plateau

更新时间：2025-03-12

- Performance of Artificially Transplanted Biocrusted Soil-surfaces in Rainwater Harvesting and Their Capability to Resist Erosion in the Hilly Region of Chinese Loess Plateau
- Vol. 38, Issue 3, Pages: 29-36(2024)
- 作者机构：
  
  1. 中国农业大学土地科学与技术学院, 农业农村部华北耕地保育重点实验室,北京,100193
  2. 中国科学院水利部水土保持研究所, 陕西杨凌,712100
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2024.03.038
  CLC： S157.1
- Published：2024
- 稿件说明：
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CHEN Junru, JIANG Zihao, XIAO Bo, et al. Performance of Artificially Transplanted Biocrusted Soil-surfaces in Rainwater Harvesting and Their Capability to Resist Erosion in the Hilly Region of Chinese Loess Plateau[J]. 2024, 38(3): 29-36.
DOI：

CHEN Junru, JIANG Zihao, XIAO Bo, et al. Performance of Artificially Transplanted Biocrusted Soil-surfaces in Rainwater Harvesting and Their Capability to Resist Erosion in the Hilly Region of Chinese Loess Plateau[J]. 2024, 38(3): 29-36. DOI： 10.13870/j.cnki.stbcxb.2024.03.038.

摘要

[目的] 为探讨黄土丘陵区不同类型人工生物结皮集雨面的集雨效果及抗侵蚀破损能力。[方法] 以人工移植培养的藻类和藓类生物结皮为研究对象

以裸土为对照

分别对其进行野外模拟降雨和抗侵蚀试验(坡面冲刷、土壤静水崩解和单雨滴溅蚀试验)

分析不同类型集雨面的集雨效率与土壤抗冲系数、土壤崩解速率和溅蚀量等抗侵蚀能力指标的差异。[结果] (1)生物结皮集雨面显著提高集雨效率。当雨强为100 mm/h时

相较于裸土

生物结皮集雨面的集雨效率显著提高33.3%(F=300.12

p<0.001)。(2)生物结皮显著降低产沙量并提高抗冲系数。与裸土相比

藻结皮和藓结皮的产沙量分别减少178.8%和364.6%

藓结皮和藻结皮的最大抗冲系数分别是裸土的4.6

2.8倍。(3)生物结皮显著降低土壤崩解速率和最大崩解率

且不同生物结皮类型差异显著。与裸土(6.46 g/min)相比

藻结皮和藓结皮的土壤崩解速率分别降低35.0%和60.2%;生物结皮平均最大崩解率较裸土降低23.8%。(4)生物结皮显著提高临界击穿雨滴动能并降低土壤溅蚀量。藓结皮和藻结皮的临界击穿雨滴动能分别是裸土(0.5 J)的3.9

21.9倍。同时

生物结皮较裸土(0.156 g)的单雨滴溅蚀量平均减少75.3%。[结论] 人工移植培养的生物结皮集雨面显著提高集雨效率和表层土壤的抗侵蚀能力

对旱区集雨措施的可持续利用和水土保持方面具有重要意义。

Abstract

[Objective] The purpose of the study was to explore the rainwater harvesting effect and erosion damage resistance of different types of artificial biocrusted soil surfaces in the hilly region of Chinese Loess Plateau. [Methods] The biocrusted soil surfaces were taken as the research object

and the bare soil surfaces as the control. The study conducted field simulated rainfall and erosion resistance experiments (slope scouring

soil disintegration

and single raindrop splash erosion experiments) on them

respectively. Differences in the erosion resistance among different types of soil surfaces were analyzed. [Results] (1) Biocrusted soil surfaces significantly improved rainwater harvesting efficiency. At a rainfall intensity of 100 mm/h

the rainwater harvesting efficiency of the biocrusted soil surfaces was significantly increased by 33.3% compared to bare soil (F = 300.12

p < 0.001). (2) Biocrusted soil surfaces significantly reduced the sand production and increased the coefficient of erosion resistance. Compared with bare soil

the sand production of cyano and moss biocrusted soil surfaces was reduced by 178.8% and 364.6%

respectively. Compared to bare soil

moss and cyano biocrusts had 4.6 and 2.8 times

respectively

the maximum coefficients of resistance to washout. (3) Biocrusts significantly reduced the soil disintegration rate and maximum disintegration rate

and the differences were significant. Compared with bare soil (6.46 g/min)

the disintegration rates of cyano and moss biocrusts were reduced by 35.0% and 60.2%

respectively and the maximum disintegration rate of biocrusts was reduced by 23.8%. (4) Biocrusts significantly increased the raindrop kinetic energy and reduced soil spallation. The critical kinetic energy of moss and cyano biocrusts was 3.9 and 21.9 times higher than that of bare soil (0.5 J)

respectively. Meanwhile

the soil splash erosion of the biocrusts was reduced by 75.3% on average compared to bare soil (0.156 g). [Conclusion] Biocrusted soil surfaces significantly improved the erosion resistance and rainwater harvesting effect

which is of great significance in terms of sustainable utilization and soil and water conservation in dry areas.

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