毛竹林套种草珊瑚后土壤有机碳组分特征变化

徐向阳; 陈则栋; 张小平; 高贵宾; 黄志远; 吴志庄

doi:10.12356/j.2096-8884.2024-0020

毛竹林套种草珊瑚后土壤有机碳组分特征变化

doi: 10.12356/j.2096-8884.2024-0020

徐向阳^{1, 2,},
陈则栋¹,
张小平¹,
高贵宾¹,
黄志远¹,
吴志庄^1, ,

1.
国家林业和草原局竹子研究开发中心竹林生态与资源利用国家林业和草原局重点实验室，杭州310012
2.
南京林业大学风景园林学院，南京 210037

基金项目: 浙江省林业科技项目（2023B04）；中央级公益性科研院所基本科研业务费专项资金（CAFYBB2022XE002）

详细信息

作者简介:
徐向阳：E-mail：xuxiangyang202210@163.com

通讯作者:
E-mail：wzzcaf@126.com

中图分类号: S795.9
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出版历程
- 收稿日期: 2024-03-02
- 录用日期: 2024-04-23

Characterization of Changes in Soil Organic Carbon Fractions of Phyllostachys edulis Interplanted with Sarcandra glabra

1.
China National Bamboo Research Center, Key Laboratory of State Forestry and Grassland Administration on Bamboo Forest Ecology and Resource Utilization, Hangzhou 310012
2.
Nanjing Forestry University, the College of Landscape Architecture, Nanjing 210037

摘要

摘要: 目的研究毛竹林下套种草珊瑚对土壤有机碳组分和碳库管理指数的影响，以期明确复合经营对毛竹林土壤有机碳稳定性的扰动程度，为制定可持续性、高综合效益的毛竹林经营策略提供科学依据。方法以毛竹林下套种草珊瑚的表层土（0～20cm）为研究对象（SG），以毗邻的毛竹纯林为对照（CK），分析了土壤有机碳（SOC）、易氧化有机碳（EOC）、微生物量碳（MBC）、可溶性有机碳（DOC）、铁铝结合态有机碳（Fe(Al)-SOC））和钙结合态有机碳（Ca-SOC）含量，并量化了碳库管理指数。结果与毛竹纯林相比，套种草珊瑚后土壤有机碳含量提升了51.3%，土壤活性有机碳组分（EOC、MBC、DOC）的含量及其占土壤有机碳的比例显著上升，土壤稳定态有机碳组分（Fe(Al)-SOC、Ca-SOC）的含量显著提升，但其占土壤有机碳的比例显著下降。此外，与毛竹纯林相比，套种草珊瑚土壤碳库活度（L）与碳库管理指数（CPMI）显著增加，氧化稳定系数（K_os）显著下降。冗余分析结果显示土壤容重（BD）是影响土壤有机碳及其组分的关键环境因子。相关分析结果显示，容重与土壤有机碳及其组分呈显著负相关，速效氮（AN）、速效磷（AP）与土壤有机碳及其组分呈显著正相关结论毛竹林下套种草珊瑚提高了土壤有机碳及其组分的含量，提高了活性有机碳组分的相对含量，降低了稳定有机碳组分的相对含量，提高了土壤碳库管理指数，利于土壤碳库的更新与循环。
- 有机碳组分 /
- 碳库管理指数 /
- 林下套种 /
- 毛竹林 /
- 草珊瑚
Abstract: Objective The changes of soil organic carbon content and carbon pool management index caused by intercropping Sarcandra glabra under Phyllostachys edulis forest were investigated to clarify the disturbance degree of organic carbon stability of bamboo ecosystem by composite management, and provide scientific basis for formulating sustainable management strategy with high comprehensive benefits. Method The surface soil (0-20cm) of intercropping Sarcandra glabra under Phyllostachys edulis was taken as the study object (SG), and the surface soil of adjacent pure Phyllostachys edulis was set as the control (CK). Soil organic carbon (SOC), easily oxidizable carbon (EOC), microbial biomass carbon (MBC), dissolved organic carbon (DOC), Fe-Al-bound organic carbon (Fe(Al)-SOC) and Ca-bound organic carbon (Ca-SOC) contents were analyzed, the carbon pool management index was quantified. Result Compared with pure Phyllostachys edulis forest, intercropping Sarcandra glabra soil organic carbon content increased by 51.3%, and the contents of soil active organic carbon components (EOC, MBC, DOC) and their proportion to soil organic carbon increased significantly, the contents of soil stable organic carbon fractions (Fe(Al)-SOC and Ca-SOC) significantly increased, while their proportions to soil organic carbon significantly decreased. In addition, compared with pure Phyllostachys edulis forest, intercropping Sarcandra glabrasoil carbon pool activity (L) and carbon pool management index (CPMI) significantly increased, while coefficient of oxidative stability (K_os) significantly decreased. RDA analysis showed that soil bulk density (BD) was a key environmental factor affecting soil organic carbon and its components. The results of correlation analysis showed that bulk density was significantly negatively correlated with soil organic carbon and its components, and available nitrogen (AN) and available phosphorus (AP) were significantly positively correlated with soil organic carbon and its components Conclusion Intercropping Sarcandra glabrasoil under Phyllostachys edulis forest increased the content of soil organic carbon and its components, increased the relative content of active organic carbon components, and decreased the relative content of stable organic carbon components, which was conducive to the regeneration and cycling of soil carbon pool.
- organic carbon component /
- carbon pool management index /
- interplanting under forests /
- Phyllostachys edulis forests /
- Sarcandra glabra

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图 1 毛竹林套种草珊瑚对土壤有机碳及其组分含量的影响

注：* 表示P＜0.05；**表示P＜0.01；***表示P＜0.001，下同。* meant P＜0.05; **meant P＜0.01; ***meant P＜0.001. The same below.

Figure 1. Effects of Phyllostachys edulis interplanted with Sarcandra glabra on soil organic carbon and its components

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图 2 毛竹林套种草珊瑚对土壤有机碳组分相对含量的影响

Figure 2. Relative content of soil organic carbon components under Phyllostachys edulis single forest and interplanting with Sarcandra glabra

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图 3 2种模式下土壤有机碳组分与环境因子分析

Figure 3. Redundancy analysis (RDA) of soil organic carbon and environmental factors under two models

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图 4 层次分割分析（RDA）中各因子的解释率

Figure 4. Interpretation rate of each factor in soil environmental factors redundancy analysis （RDA）

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图 5 土壤有机碳及其组分与解释变量的相关分析

Figure 5. Correlation analysis of soil organic carbon and its components with explanatory variables

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表 1 土壤基本理化性质

Table 1. Basic physical and chemical properties of soil

处理 Treatments	pH值 pH-value	容重 Bulk density/(g·cm⁻³)	有机碳 Soil organic carbon/(g·kg⁻¹)	速效氮 Available nitrogen/(mg·kg⁻¹)	速效磷 Available phosphorus/(mg·kg⁻¹)
纯林 CK	4.42±0.01a	1.18±0.01a	24.05±0.22a	66.92±2.10a	0.67±0.05a
套种 SG	4.60±0.01b	1.09±0.01b	36.38±0.28b	92.40±1.71b	1.23±0.07b
注：同列不同字母表示差异显著（P＜0.05），下同。Different letters in the same column meant significant difference at 0.05 level. The same below.

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表 2 毛竹林套种草珊瑚对土壤碳库管理指数的影响

Table 2. Effects of Phyllostachys edulis interplanted with Sarcandra glabra on soil carbon pool management index

处理 Treatment	碳库活度 Carbon lability (L)	碳库活度指数 Carbon lability index (LI)	碳库指数 Carbon index (CPI)	碳库管理指数 Carbon pool management index (CPMI)/%	氧化稳定系数 Oxidation stability index (K_os)
纯林 CK	0.25±0.01a	1±0.00a	1±0.00a	100±0.00a	3.94±0.01a
套种 SG	0.27±0.01b	1.08±0.01b	1.51±0.01b	162.68±1.86b	3.66±0.02b

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