Water-holding characteristics of soil-litter at forest gap of low-efficiency Chinese fir forest

Xiao Bin; Yao Jiabao; Xu Keqin; Yuan Yuan; Ding Ying; Cai Zongming

doi:10.13961/j.cnki.stbctb.2025.02.006

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Water-holding characteristics of soil-litter at forest gap of low-efficiency Chinese fir forest

- Water-holding characteristics of soil-litter at forest gap of low-efficiency Chinese fir forest
- Bulletin of Soiland Water Conservation Vol. 45, Issue 2, Pages: 45-53(2025)
- 作者机构：
  
  1. 中国林业科学研究院亚热带林业实验中心, 江西分宜,336600
  2. 生物多样性保护与资源利用江西省重点实验室, 江西分宜,336600
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2025.02.006
  CLC： S714.7
- Online First：16 May 2025，
  
  Published：2025
- 稿件说明：
移动端阅览
Xiao Bin, Yao Jiabao, Xu Keqin, et al. Water-holding characteristics of soil-litter at forest gap of low-efficiency Chinese fir forest[J]. Bulletin of Soiland Water Conservation, 2025, 45(2): 45-53.
DOI：

Xiao Bin, Yao Jiabao, Xu Keqin, et al. Water-holding characteristics of soil-litter at forest gap of low-efficiency Chinese fir forest[J]. Bulletin of Soiland Water Conservation, 2025, 45(2): 45-53. DOI： 10.13961/j.cnki.stbctb.2025.02.006.

摘要

[目的

]

研究不同杉木林窗大小与年龄对土壤及凋落物的持水特性，为杉木低效林质量提升提供理论依据。[方法

]

采用时空替代法选取4，15，30，50 a林窗，并以顶级群落作为对照，每个林窗年龄设置小林窗(≤50 m

)、中林窗(50～100 m

)、大林窗(≥100 m

)及非林窗对照4个处理，通过环刀法、铝盒烘干法、凋落物浸泡法分别测定土壤及凋落物持水特性。[结果

]

①仅杉木林窗年龄对土壤及凋落物持水特性具有显著性影响，而林窗大小、林窗年龄与大小的交互作用影响不显著。②4 a中林窗土壤持水性最佳，15 a中林窗半分解凋落物的现存量、最大持水量、最大持水率、自然持水量和有效拦蓄量表现最优。③各林窗年龄凋落物持水率随浸泡时间变化，中林窗和大林窗表现较好，半分解层持水能力强于未分解层。④凋落物半分解自然持水量与土壤毛管孔隙度、田间持水量和毛管持水量呈显著正相关。[结论

]

4 a和15 a中林窗土壤及凋落物持水性良好，人工开设中等大小林窗可作为杉木低效林质量提升的重要技术手段。

Abstract

[Objective] The water holding characteristics of soil and litter in low-efficiency of Chinese fir trees with different gap sizes and ages were investigated to provide a theoretical basis for improving the tree quality in low-efficiency Chinese fir forests. [Methods] Gap ages of 4

and 50 years were selected based on the results of the space-time substitution method

and the climax community was used as the control. Four treatments were set for each gap age: small (≤50 m2)

medium (50—100 m2)

and large (≥100 m2) gaps

as well as a non-gap control. The water holding characteristics of soil and litter were determined using the cutting-ring method

oven drying method

and litter soaking methods

respectively. [Results] ① Only the gap age had a significant effect on the water-holding characteristics of soil and litter

whereas the gap size and the interaction between gap age and size had no significant effect. ② The best soil water holding capacity was observed in the 4-year-forest gap

and the best standing crop

maximum water-holding capacity

maximum water-holding rate

natural water holding capacity

and effective storage capacity of semi-decomposed litter was observed in the 15-year-forest gap. ③ The water holding rate of litter in different gap ages changed with soaking time; the middle and large gaps performed the best

and the water-holding capacity of the semi-decomposed layer was stronger than that of the undecomposed layer. ④ The natural water-holding capacity of semi-decomposed litter was significantly positively correlated with soil capillary porosity

field water-holding capacity

and capillary water-holding capacity. [Conclusion] The water-holding capacity of soil and litter was good in the 4 and 15-year-forest gaps. Based on our results

the artificial opening of a medium-sized forest gap could be used as an important technical means to improve the quality of low-efficiency Chinese fir forest.

关键词

Keywords

references

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