Distribution Characteristics and Influencing Factors of Soil Carbon, Nitrogen and Phosphorus Storage in Karst Forest in the Lijiang River Basin

ZHONG Jianjun; LI Lin; WEI Shiguang; SHEN Kaihui; ZHOU Jinggang; WEN Zhifeng; ZHAO Yi; YANG Xintian

doi:10.13870/j.cnki.stbcxb.2023.06.023

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Distribution Characteristics and Influencing Factors of Soil Carbon, Nitrogen and Phosphorus Storage in Karst Forest in the Lijiang River Basin

更新时间：2025-03-12

- Distribution Characteristics and Influencing Factors of Soil Carbon, Nitrogen and Phosphorus Storage in Karst Forest in the Lijiang River Basin
- Vol. 37, Issue 6, Pages: 180-186(2023)
- 作者机构：
  
  1. 广西师范大学珍稀濒危动植物生态与环境保护教育部重点实验室,广西,桂林,541000
  2. 广西漓江流域景观资源保育与可持续利用重点实验室,广西,桂林,541000
  3. 桂林电子科技大学生命与环境科学学院,广西,桂林,541000
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2023.06.023
  CLC：
- Published：2023
- 稿件说明：
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ZHONG Jianjun, LI Lin, WEI Shiguang, et al. Distribution Characteristics and Influencing Factors of Soil Carbon, Nitrogen and Phosphorus Storage in Karst Forest in the Lijiang River Basin[J]. 2023, 37(6): 180-186.
DOI：

ZHONG Jianjun, LI Lin, WEI Shiguang, et al. Distribution Characteristics and Influencing Factors of Soil Carbon, Nitrogen and Phosphorus Storage in Karst Forest in the Lijiang River Basin[J]. 2023, 37(6): 180-186. DOI： 10.13870/j.cnki.stbcxb.2023.06.023.

摘要

以探明漓江流域喀斯特森林土壤的碳氮磷储量分布为目的

为保护漓江流域脆弱的喀斯特生态系统提供理论依据。在漓江上中下游各流域段的典型喀斯特森林共设置20 m×20 m的15块天然林样方

对森林植被进行每木检尺调查

采用五点采集法采集0-20

20-40 cm土层土壤

分析土壤碳氮磷储量空间分布情况及驱动因子作用途径

量化各类生物和非生物因子对区域喀斯特森林土壤养分储量分布格局形成的作用贡献。结果表明:(1)漓江流域喀斯特森林土壤碳氮磷储量平均分布表现为上游＞下游＞中游

在漓江流域喀斯特森林土壤中碳、氮、磷储量分别为55.8~192.0

3.1~14.8

6.0~12.0 kg/m2。在同一流域土壤中

0-20 cm土层碳氮含量均显著高于同流域20-40 cm土层

磷元素在漓江流域不同深度土层中未表现出显著差异。(2)碳储量与C/P、N/P、森林物种多样性Shannon-Wiener指数和Simpson指数均呈现出显著正相关关系;氮储量与C/P、N/P、Shannon-Wiener指数和Simpson指数均呈现显著正相关关系

与C/N呈现显著负相关关系;磷储量与C/N呈现显著负相关关系

与森林物种多样性不存在显著相关关系。(3)漓江流域喀斯特森林土壤化学计量特征是驱动土壤碳氮磷储量分布的直接驱动因子

且深层土壤化学计量特征是最重要的直接驱动因子

其次森林物种多样性对于土壤养分的固定和输入起到重要作用

直接影响并驱动土壤碳氮储量分布格局

磷储量不受森林植被状况的影响。漓江流域喀斯特森林土壤中

化学计量特征与森林植物多样性对土壤碳氮磷储量起到重要影响

提倡通过提升漓江流域森林物种多样性

改善流域森林土壤蓄水保肥功能

以此保护漓江流域脆弱的喀斯特森林生态系统。

Abstract

In order to explore the distribution of soil carbon

nitrogen and phosphorus storage in Karst forest in the Lijiang River Basin

and to provide a theoretical basis for protecting the fragile Karst ecosystem in the Lijiang River Basin

a total of 15 natural forest quadrats of 20 m × 20 m were set up in the typical Karst forests in the upper

middle and lower reaches of the Lijiang River

and the forest vegetation was surveyed for each tree. The 0-20

20-40 cm soil layers were collected by five-point collection method to analyze the spatial distribution of soil carbon

nitrogen and phosphorus storage and driving factors

and to quantify the contribution of various biological and abiotic factors to the formation of soil nutrient storage pattern in karst forest. The results showed that: (1) The average distribution of soil carbon

nitrogen and phosphorus storage in the Karst forest in the Lijiang River Basin was upstream > downstream > midstream. In the Karst forest soil of the Lijiang River Basin

the storage of carbon

nitrogen and phosphorus was 55.8~192.0

3.1~14.8

and 6.0~12.0 kg/m2

respectively. The storage of carbon and nitrogen in 20 cm soil layer in the same watershed was significantly higher than that in 20-40 cm soil layer

while phosphorus storage did not show significant difference in the soil layers of different depth in the Lijiang River Basin. (2) Carbon storage showed a significant positive correlation with C/P

N/P

Shannon-Wiener index and Simpson index of forest species diversity; nitrogen storage had a significant positive correlation with C/P

N/P

Shannon Wiener index and Simpson index

while a significant negative correlation with C/N; the phosphorus storage had a significant negative correlation with C/N

and there was no significant correlation with forest species diversity. (3) The stoichiometric characteristics of Karst forest soil chemistry in the Lijiang River Basin were the direct driving factors driving the distribution of soil carbon

nitrogen and phosphorus storages

and the stoichiometric characteristics of deep soil were the most important direct driving factors. Secondly

forest species diversity played an important role in the immobilization and input of soil nutrients

directly affecting and driving the formation of soil carbon and nitrogen storage distribution pattern. The formation of phosphorus storage was not driven by the impact of forest vegetation conditions. In the Karst forest soil in the Lijiang River basin

the stoichiometric characteristics and the diversity of forest plants had played an important role in the formation and decomposition of soil carbon

nitrogen and phosphorus reserves. It is advocated to improve the water and fertilizer storage functions of forest soil in the Lijiang River Basin by improving the species diversity of forest vegetation in the Lijiang River Basin

while protecting the fragile karst forest ecosystem in the Lijiang River Basin.

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