Relationship Between Soil Aggregate Stability and Different Forms of Fe and Al Oxides in Different Forest Types

ZHAO Youpeng; MENG Miaojing; ZHANG Jinchi; MA Jieyi; LIU Shenglong

doi:10.13961/j.cnki.stbctb.2018.04.012

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Relationship Between Soil Aggregate Stability and Different Forms of Fe and Al Oxides in Different Forest Types

- Relationship Between Soil Aggregate Stability and Different Forms of Fe and Al Oxides in Different Forest Types
- Bulletin of Soiland Water Conservation Vol. 38, Issue 4, Pages: 75-81(2018)
- 作者机构：
  
  1. 南方现代林业协同创新中心江苏省水土保持与生态修复重点实验室南京林业大学林学院,江苏,南京,210037
  2. 浙江省凤阳山-百山祖国家级自然保护区凤阳山管理处, 浙江龙泉,323700
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2018.04.012
  CLC：
- Published：2018
- 稿件说明：
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ZHAO Youpeng, MENG Miaojing, ZHANG Jinchi, et al. Relationship Between Soil Aggregate Stability and Different Forms of Fe and Al Oxides in Different Forest Types[J]. Bulletin of Soiland Water Conservation, 2018, 38(4): 75-81.
DOI：

ZHAO Youpeng, MENG Miaojing, ZHANG Jinchi, et al. Relationship Between Soil Aggregate Stability and Different Forms of Fe and Al Oxides in Different Forest Types[J]. Bulletin of Soiland Water Conservation, 2018, 38(4): 75-81. DOI： 10.13961/j.cnki.stbctb.2018.04.012.

摘要

[目的

]

探究浙江省凤阳山保护区内土壤铁铝氧化物对土壤团聚体稳定性的影响机理，为该区恢复与保护土壤资源提供理论依据。[方法

]

以浙江省凤阳山保护区内黄棕壤地带4种林分类型（阔叶混交林、针阔混交林、杉木林、竹林）为对象，测定不同土层（0—10 cm，10—20 cm，20—30 cm）水稳定性团聚体粒径分布以及不同形态的铁铝氧化物含量，分析各形态铁铝氧化物含量对土壤团聚体稳定性的影响。[结果

]

①4种林分类型土壤团聚体水稳性大团聚体（>0.25 mm）含量均在90%以上，水稳定性大团聚体含量和平均质量直径（MWD）均表现为：杉木林 > 针阔混交林 > 阔叶混交林 > 竹林。②不同形态铁铝氧化物含量大小整体上表现为：游离态氧化铁Fe

>> 游离态氧化铝Al

> 无定形氧化铁Fe

> 无定形氧化铝Al

> 络合态氧化铁Fe

> 络合态氧化铝Al

，各形态的氧化铁含量随土层加深均增加。③增强回归树BRT分析结果显示，对土壤团聚体MWD影响最大的是Al

，贡献率为43.6%；其次是Al

（23.5%）和Fe

（19.5%）；Fe

（6.9%），Al

（4%）及Fe

（2.4%）的影响程度较小。[结论

]

，Al

和Fe

能促进土壤团聚体稳定，络合态氧化铝Al

对土壤团聚体稳定性的促进作用大于游离态铁铝氧化物Al

和Fe

。

Abstract

[Objective] In order to provide a theoretical basis for the restoration and protection of soil resources

we explore the composition and stability of different forest soil aggregrates in Fengyang Mountain Nature Reserve.[Methods] This study determinated soil aggregates particle size distribution and the content of different forms of Fe and Al oxides in different soil layers(0-10 cm

10-20 cm

20-30 cm)

and analyzed the effects of various forms of Fe and Al oxides on the stability of soil aggregates in four main forest types(broad-leaved mixed forest

coniferous and broad-leaved mixed forest

Chinese fir forest

bamboo forest)during 1 300~1 400 m of Fengyang Mountain Nature Reserve

Zhejiang Province.[Results] ① The content of soil water-stable macroaggregates(WSA)(>0.25 mm) in four forest types were above 90%

and the order of the content of water-stable aggregates and mean weight diameter(MWD) of soil aggregate were fir forest > coniferous and broad-leaved mixed forest > broad-leaved mixed forest > bamboo forest. ② The order of Fe and Al oxides contents in different forms is Free Fe(Fed) > Free Al(Ald) > Amorphous Fe(Feo) > Amorphous Al(Alo) > Complexing Fe(Fep) > Complexing Al(Alp) ③ The result of boosted regression tree(BRT) analysis showed that soil aggregate MWD was mainly influenced by Alp in various forms of Fe and Al oxides

which produced a 43.6% contribution rate

followed by Ald(23.5%) and the Fed(19.5%); Feo(6.9%)

Alo(4%) and Fep(2.4%) had less effect.[Conclusion] Alp

Ald and Fed can promote the stability of soil aggregates. The effect of complexed alumina Alp on the stability of soil aggregates is greater than that of free Fe and Al oxides Ald and Fed.

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