Impact of litter incorporation on surface soil moisture in different mixed Robinia pseudoacacia plantations

Deng Hanxiao; Sun Hanyu; Yang Yanfen; Li Qian; Bian He; Cao Zetao

doi:10.13961/j.cnki.stbctb.2025.02.007

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Impact of litter incorporation on surface soil moisture in different mixed Robinia pseudoacacia plantations

- Impact of litter incorporation on surface soil moisture in different mixed Robinia pseudoacacia plantations
- Bulletin of Soiland Water Conservation Vol. 45, Issue 2, Pages: 54-63(2025)
- 作者机构：
  
  1. 西北农林科技大学水土保持科学与工程学院
  2. 水土保持与荒漠化整治全国重点实验室, 陕西杨凌,712100
  3. 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
  4. 中国科学院大学,北京,100049
  5. 水土保持与荒漠化整治全国重点实验室, 陕西杨凌,712100
  6. 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
  7. 中国科学院大学,北京,100049
  8. 西北农林科技大学资源环境学院, 陕西杨凌,712100
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2025.02.007
  CLC： S714
- Online First：16 May 2025，
  
  Published：2025
- 稿件说明：
移动端阅览
Deng Hanxiao, Sun Hanyu, Yang Yanfen, et al. Impact of litter incorporation on surface soil moisture in different mixed Robinia pseudoacacia plantations[J]. Bulletin of Soiland Water Conservation, 2025, 45(2): 54-63.
DOI：

Deng Hanxiao, Sun Hanyu, Yang Yanfen, et al. Impact of litter incorporation on surface soil moisture in different mixed Robinia pseudoacacia plantations[J]. Bulletin of Soiland Water Conservation, 2025, 45(2): 54-63. DOI： 10.13961/j.cnki.stbctb.2025.02.007.

摘要

[目的

]

探究典型刺槐混交人工林中枯落物混入土壤的水文过程，为提高黄土高原丘陵区典型植被水源涵养能力提供重要依据。[方法

]

以陕西省吴起县5种典型混交人工林(刺槐×油松、刺槐×紫穗槐、刺槐×沙棘、刺槐×山桃、刺槐×山杏)以及刺槐纯林中混入土壤的枯落物为研究对象，采用浸泡法测定不同类型与不同量枯落物混入后土壤含水量，并分析其蒸发过程。[结果

]

①典型植被样地枯落物混入量为204～2 087 g/m

，总平均混入量为733.53 g/m

，平均深度为1.3～1.9 cm。②6种混交人工林类型中均为：人为混入枯落物土＞原状混入枯落物土＞裸土，其中刺槐纯林和刺槐×紫穗槐的毛管含水量增加幅度较大。③在6种人工林中混入700 g/m

枯落物混入后土壤水分蒸发特性显示整体趋势基本一致，随着时间的延长，土壤含水量均呈下降趋势，其中混入刺槐×紫穗槐与刺槐×山杏类型的枯落物使得土壤含水量增加较大，混入刺槐×沙棘类型的枯落物土壤含水量增加较小。④同一林地类型下混入不同量的枯落物后土壤含水量均高于未混入土壤，且刺槐纯林、刺槐×油松、刺槐×山杏在混入1 000 g/m

时土壤含水量达到最大，刺槐×沙棘在混入700 g/m

时达到最大。[结论

]

枯落物混入土壤有助于提高土壤含水量，特别是毛管含水量，而人为枯落物混入的效果更为显著且混交林地对土壤表层水分含量也存在影响。在黄土高原地区进行植被恢复时，可以优先考虑种植刺槐×紫穗槐和刺槐×山杏，以提高区域内的水源涵养功能。

Abstract

[Objective] The hydrological process of litter mixed with soil in typical Robinia pseudoacacia mixed plantation was explored

in order to provide an important basis for improving the water conservation capacity of typical vegetation in the hilly area of the Loess Plateau. [Methods] We focused on five types of mixed artificial forests in Wuqi

Shaanxi (R. pseudoacacia×Pinus tabuliformis

R. pseudoacacia×Sophora viciifolia

R. pseudoacacia×Hippophae rhamnoides

R. pseudoacacia×Prunus persica

R. pseudoacacia×Armeniaca sibiric) and on pure Robinia pseudoacacia forests. We used a immersion method to determine the moisture content of soil that was mixed with different types and amounts of litter. We analyzed the evaporation process. [Results] ① The litter mixture in the vegetation plots was 204～2 087 g/m2

the total average amount of litter in the soil was 733.53 g/m2

and the average depth of the litter was 1.3～1.9 cm. ② The soil moisture of the six types of mixed plantations was ranked as follows: artificially mixed with litter soil > undisturbed mixed with litter soil > bare soil. The capillary water content of the pure R. pseudoacacia forest and R. pseudoacacia×S. viciifolia was significantly higher than in the other plots. ③ The overall trends in soil water evaporation when 700 g/m2 litter was mixed with the soil in the six plantations were highly consistant: the soil water content decreased over time. The litter addition to the soil of the R. pseudoacacia×S. viciifolia and R. pseudoacacia×Armeniaca sibiric forests considerably increased the soil water content

whereas the soil water content of the soil mixed with litter in the R. pseudoacacia×H. rhamnoides forest slightly increased compared with the control. ④ The soil moisture content of the same forest type was higher than that of the unmixed soil after different amounts of litter were added. The maximum soil moisture contents of the pure R. pseudoacacia forest as well as R. pseudoacacia×Armeniaca sibiric and R. pseudoacacia×P. armeniaca forests were reached when the litter content was 1 000 g/m2

and the maximum soil moisture content was reached in the R. pseudoacacia×H. rhamnoide forest when the litter content was 700 g/m2. [Conclusion] Incorporating litter into the soil increased the soil moisture content

especially capillary moisture

and the effects of artificially added litter were more pronounced than those of naturally added litter. The type of forest also influenced the surface soil moisture levels. On the Loess Plateau

planting R. pseudoacacia×S. viciifolia and R. pseudoacacia×A. sibiric should be prioritized to increase water conservation in the region.

关键词

Keywords

references

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