Study on the Effects of Litter and Soil Hydrology of Different Density

LIN Liwen; DENG Yusong; LI Peiqi; YANG Gairen; JIANG Daihua; HUANG Zhigang; LEI Zhen

doi:10.13870/j.cnki.stbcxb.2020.05.028

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Study on the Effects of Litter and Soil Hydrology of Different Density

更新时间：2025-03-12

- Study on the Effects of Litter and Soil Hydrology of Different Density
- Vol. 34, Issue 5, Pages: 200-207(2020)
- 作者机构：
  
  1. 广西大学林学院,南宁,530004
  2. 广西大学农学院,南宁,530004
  3. 中国农业科学院农业环境与可持续发展研究所,北京,100081
  4. 广西融水县国营贝江河林场, 广西融水,545300
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2020.05.028
  CLC： S715
- Published：2020
- 稿件说明：
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LIN Liwen, DENG Yusong, LI Peiqi, et al. Study on the Effects of Litter and Soil Hydrology of Different Density[J]. 2020, 34(5): 200-207.
DOI：

LIN Liwen, DENG Yusong, LI Peiqi, et al. Study on the Effects of Litter and Soil Hydrology of Different Density[J]. 2020, 34(5): 200-207. DOI： 10.13870/j.cnki.stbcxb.2020.05.028.

摘要

以桂北融水县贝江河林场杉木人工林为对象，采用野外实地观测与室内浸水法，研究了6种不同密度杉木林枯落物层和土壤层的水文效应。结果表明：（1）6种密度杉木林枯落物的厚度介于3.9~5.7 cm，蓄积量介于4.3~6.4 t/hm2，枯落物厚度与蓄积量变化一致，从大到小依次为1 755，1 440，2 025，2 700，2 325，975 plants/hm2；（2）枯落物最大持水量为2.40~14.23 t/hm2，最大拦蓄量为5.23~11.51 t/hm2，有效拦蓄量为2.45~9.49 t/hm2，且均以1 755 t/hm2最大；（3）在0—100 cm土层内，不同密度杉木林土壤容重介于1.19~1.28 g/cm3，当林分密度为1 755 plants/hm2时容重最小；（4）6种不同密度杉木林土壤的最大持水量和有效持水量均以1 755 plants/hm2最大，且最大持水量远大于有效持水量；（5）枯落物及其各分解层的持水量与浸水时间呈明显对数关系（R2>0.96），吸水速率与浸泡时间呈幂函数关系（R2>0.92）。综上得出，林分密度在1 755 plants/hm2左右时，杉木林能更好地发挥水源涵养功能。

Abstract

Based on field observation and indoor immersion methods

we examined hydrological effects of litter layer and soil layer of six different densities of Cunninghamia lanceolata plantation in Rongshui Beijianghe Forest Farm of Northern Guangxi. The results showed that: (1) The litter thickness and the stock volume of six densities of Cunninghamia lanceolata plantation ranged from 3.9 to 5.7 cm and from 4.3 to 6.4 t/hm2

the thickness of litter was consistent with the change of accumulation

and the order from large to small was 1 755

1 440

2 025

2 700

2 325

975 plants/hm2; (2)The maximum water holding capacity of litter is 2.40~14.23 t/hm2

and the maximum storage capacity was 5.23~11.51 t/hm2. The effective storage capacity was 2.45~9.49 t/hm2

of which 1 755 plants/hm2 was the largest; (3) In the 0—100 cm soil layer

the soil bulk density of different densities of Cunninghamia lanceolata was between 1.19~1.28 g/cm3

and the minimum density is 1 755 plants/hm2; (4) The maximum and effective water holding capacity of six different densities of Cunninghamia lanceolat were 1 755 plants/hm2

and the maximum water holding capacity was far greater than the effective water holding capacity; (5) The water holding capacity of litter and its decomposition layers had a logarithmic relationship with soaking time (R2>0.96)

and the water absorption rate had a power function relationship with soaking time (R2>0.92). In conclusion

the forest with density about 1 755 plants/hm2

Cunninghamia lanceolata forest showed better water conservation ability.

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