氮磷添加对常绿阔叶林土壤团聚体

贺凌云; 陈伏生; 郑志宇; 刘俏; 王晟楠; 王方超

doi:10.13870/j.cnki.stbcxb.2024.02.023

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氮磷添加对常绿阔叶林土壤团聚体

更新时间：2025-03-12

- 氮磷添加对常绿阔叶林土壤团聚体
- Effects of Nitrogen and Phosphorus Additions on Aggregate-associated Soil Carbon and Interactions with Phosphorus Fractions in Evergreen Broad-leaved Forest
- 水土保持学报 2024年38卷第2期页码：377-386
- 作者机构：
  
  1. 江西农业大学国家林业和草原局鄱阳湖流域森林生态系统保护与修复实验室,南昌,330045
  2. 江西省林业资源监测中心,南昌,330046
- 作者简介：
- 基金信息：
  
  国家自然科学基金项目(31930070,32171759,32201533)
- DOI：10.13870/j.cnki.stbcxb.2024.02.023
  中图分类号： S153.6
- 纸质出版：2024
- 稿件说明：
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贺凌云, 陈伏生, 郑志宇, 等. 氮磷添加对常绿阔叶林土壤团聚体[J]. 水土保持学报, 2024,38(2):377-386.

HE Lingyun, CHEN Fusheng, ZHENG Zhiyu, et al. Effects of Nitrogen and Phosphorus Additions on Aggregate-associated Soil Carbon and Interactions with Phosphorus Fractions in Evergreen Broad-leaved Forest[J]. 2024, 38(2): 377-386.
贺凌云, 陈伏生, 郑志宇, 等. 氮磷添加对常绿阔叶林土壤团聚体[J]. 水土保持学报, 2024,38(2):377-386. DOI： 10.13870/j.cnki.stbcxb.2024.02.023.

HE Lingyun, CHEN Fusheng, ZHENG Zhiyu, et al. Effects of Nitrogen and Phosphorus Additions on Aggregate-associated Soil Carbon and Interactions with Phosphorus Fractions in Evergreen Broad-leaved Forest[J]. 2024, 38(2): 377-386. DOI： 10.13870/j.cnki.stbcxb.2024.02.023.

摘要

[目的] 为探究磷输入如何调节大气氮沉降对土壤团聚体有机碳含量及碳与磷关系的影响。[方法] 在常绿阔叶林土壤建立长达6年(2015—2021年)的养分添加长期监测试验平台

包括4个处理:对照[P0+N0

P0 kg/(hm2·a)+N0 kg/(hm2·a)]、氮添加[P0+N100

P0 kg/(hm2·a)+N100 kg/(hm2·a)]、磷输入[P50+N0

P50 kg/(hm2·a)+N0 kg/(hm2·a)]以及氮磷同时输入[P50+N100

P50 kg/(hm2·a)+N100 kg/(hm2·a)]

各处理设3次重复

共计12个样地。于2021年8月采集样地0—10 cm土层土壤样品

测定基础理化性质、土壤粒径分布规律、不同粒径土壤团聚体磷组分及有机碳(SOC)含量。[结果] (1) P0处理下

氮添加显著增加大团聚体占比

减少黏粒和粉粒含量

提高各团聚体粒径中SOC含量;氮添加分别显著降低和增加团聚体黏粒、粉粒中易分解态磷组分(LP)和难分解态磷组分(RP)含量。(2) P50处理下

氮添加显著提高土壤团聚体平均几何直径(GMD)

对各粒径团聚体中磷组分和SOC含量均无显著影响。(3) P0处理下

土壤团聚体SOC与难分解态磷呈正相关关系;P50处理下

土壤团聚体SOC与各功能磷组分无显著相关。由此推断

P0处理下

氮添加通过提高常绿阔叶林土壤团聚体黏粒、粉粒径中难分解态磷而增加土壤有机碳的固持;P50处理下

氮添加对各粒径中有机碳的影响可能受到生物因素的调节

与磷的有效性无关。[结论] 氮沉降对常绿阔叶林土壤团聚体中碳磷内在关系的影响受到磷的调控

研究结果为森林土壤碳循环应对全球气候变化提供数据支撑。

Abstract

[Objective] To explore how phosphorus input regulates the effects of atmospheric nitrogen deposition on soil aggregate organic carbon content and the relationship between carbon and phosphorus. [Methods] A long-term monitoring test platform for nutrient addition was established in evergreen broad-leaved forest soil for 6 years (2015—2021)

including 4 treatments: Control [P0+N0

P 0 kg/(hm2·a)+N 0 kg/(hm2·a)]

nitrogen addition [P0+N100

P 0 kg/(hm2·a)+N 100 kg/(hm2·a)]

phosphorus input [P50+N0

P 50 kg/(hm2·a)+N 0 kg/(hm2·a)] and nitrogen and phosphorus were simultaneously input (P50+N100

P 50 kg/(hm2·a)+N 100 kg/(hm2·a)\]

and each treatment was repeated 3 times

and a total of 12 plots were obtained. 0—10 cm soil samples were collected from the sample site in August 2021 to determine the basic physical and chemical properties

soil particle size distribution

phosphorus components of soil aggregates of different particle sizes

and organic carbon (SOC) content. [Results] (1) Under P0 treatment

nitrogen addition significantly increased the proportion of large aggregates

decreased the clay and powder contents

and increased the SOC content in each aggregate particle size. Nitrogen addition significantly decreased and increased the content of labile phosphorus (LP) and residual phosphorus (RP) in aggregate clay and powder

respectively. (2) Under P50 treatment

nitrogen addition significantly increased the geometric mean diameter (GMD) of soil aggregates

but had no significant effects on phosphorus components and SOC contents in aggregates of different particle sizes. (3) Under P0 treatment

soil aggregate SOC was positively correlated with refractory phosphorus. There was no significant correlation between SOC of soil aggregates and functional phosphorus components under P50 treatment. It was concluded that under P0 treatment

nitrogen addition could increase soil organic carbon retention by increasing the refractory phosphorus in soil aggregate clay and powder particle size of evergreen broad-leaved forest. Under P50 treatment

the effect of nitrogen addition on organic carbon in each particle size may be regulated by biological factors and has nothing to do with the availability of phosphorus. [Conclusion] The effect of nitrogen deposition on the internal relationship of carbon and phosphorus in soil aggregates in evergreen broad-leaved forests was regulated by phosphorus. The results of this study provide data supported for forest soil carbon cycling in response to global climate change.

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