[1]何晓丽,何俊波,吴艳宏*.滑坡体成土作用早期影响生物有效磷(Bio-P)含量的主要因素[J].山地学报,2024,(6):781-790.[doi:10.16089/j.cnki.1008-2786.000861]
　HE Xiaoli,HE Junbo,WU Yanhong*.Major Factors Regulating Bioavailable Phosphorus(Bio-P) Content at Early Stages of Pedogenesis in Landslide Deposits[J].Mountain Research,2024,(6):781-790.[doi:10.16089/j.cnki.1008-2786.000861]
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滑坡体成土作用早期影响生物有效磷(Bio-P)含量的主要因素
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《山地学报》[ISSN:1008-2186/CN:51-1516]

卷:
期数:
2024年第6期
页码:
781-790
栏目:
山地环境
出版日期:
2024-12-20

文章信息/Info

Title:
Major Factors Regulating Bioavailable Phosphorus(Bio-P) Content at Early Stages of Pedogenesis in Landslide Deposits
文章编号:
1008-2786-(2024)6-781-10
作者:
何晓丽1; 何俊波2; 3; 吴艳宏2*
(1.湖北文理学院 资源环境与旅游学院,湖北 襄阳 441053; 2.中国科学院、水利部成都山地灾害与环境研究所,成都 610213; 3.中国科学院大学,北京 100049)
Author(s):
HE Xiaoli1;  HE Junbo2; 3;  WU Yanhong2*
(1.College of Resource Environment and Tourism, Hubei University of Arts and Science, Xiangyang 441053, Hubei, China; 2. Institute of Mountain Hazards and Environment,Chinese Academy of Sciences & Ministry of Water Resources,Chengdu 610213, China; 3.University of Chinese Academy of Sciences, Beijing 100049, China)
关键词:
滑坡堆积体;  成土早期;  岷江上游;  大渡河泸定段;  生物有效磷
Keywords:
landslide deposit;  early pedogenesis;  the upper Minjiang River;  the Luding section of the Daduhe River;  bioavailable phosphorus
分类号:
P951
DOI:
10.16089/j.cnki.1008-2786.000861
文献标志码:
A
摘要:
生物有效磷(Bio-P)是植物生长的关键营养元素,关系到植物的生长态势和生产力水平,在土壤发育和生态系统功能调控中发挥核心作用。其释放、吸收及固定过程受到母岩类型、气候条件(特别是温度和降水状况)、土壤微生物活性及其酶促作用等多重因素的共同制约。然而,这些影响因素的交互作用及其对成土早期Bio-P循环的影响尚未得到充分阐释。本研究选取了川西地区14个年龄为5～30 a的滑坡堆积体,通过研究土壤微生物群落、母质特性及气候条件对Bio-P含量的影响,旨在探究成土早期影响Bio-P浓度的机制。研究结果显示,(1)滑坡堆积体土体Bio-P的含量呈现显著的空间异质性。大渡河泸定段与岷江上游地区的Bio-P浓度存在统计学上的显著差异(U=48, p=0.0012),前者质量浓度区间为41.18～60.02 mg?kg-1,显著高于后者的27.88～44.19 mg?kg-1。(2)在影响Bio-P含量变异的诸多因素中,气候、母质及微生物的贡献各不相同,其中气候条件在土壤磷循环调控中占据主导地位,其解释度达到57%。温度是决定Bio-P浓度的关键因素,其重要性权重为0.24。温度不仅直接通过调控土壤中磷的化学过程(涵盖溶解、吸附与沉淀等)影响Bio-P含量,还间接通过增强土壤微生物活性发挥作用,且其直接效应值0.49明显高于间接效应值0.30。(3)在生态系统管理与恢复实践中,应将温度调控作为成土早期调控土壤Bio-P浓度的基本策略。本研究成果可为土壤恢复和制定生态保护策略提供科学依据。
Abstract:
Bioavailable phosphorus(Bio-P)is a decisive nutrient element in soil, governing plant growth and productivity levels, and plays a central role in soil evolution and regulation of ecosystem functions. Its release, absorption, and fixation processes are regulated by a combination of factors such as parent rock type, climatic conditions(especially temperature and precipitation), soil microbial activity and its enzymatic role. Unfortunately, the interactions among these influencing factors and their effects on Bio-P cycling during early pedogenesis had not been fully elucidated.
In this study, soils at 14 landslide deposits with ages ranging from 5 to 30 years in western Sichuan, China were collected for testing, and the effects of soil microbial community, parent rock properties and climatic conditions on Bio-P content were studied, so as to explore the mechanism of influencing Bio-P concentration in the early stage of soil formation.
(1)The content of Bio-P in the soils of landslide deposits exhibited significant spatial heterogeneity. There was a statistically significant difference in Bio-P concentrations between the soils sampled at the Luding section of the Daduhe River and the upper reaches of the Minjiang River(U=48, p=0.0012). The concentration range of the former was 41.18-60.02 mg·kg-1, which was significantly higher than that of the latter, 27.88-44.19 mg·kg-1.
(2)Among the many factors influencing the variability of Bio-P content, the contributions of climate, parent rock and microorganisms varied, with climatic conditions dominating the regulation of soil phosphorus cycle, with a 57% degree of explanation. Temperature was a key factor determining Bio-P concentration with a relative importance weight of 0.24. Temperature not only affected Bio-P content directly by regulating the chemical processes of phosphorus in soils(covering dissolution, adsorption and precipitation, etc.), but also indirectly by enhancing soil microbial activity, and its direct effect(0.49)was significantly higher than the indirect effect(0.30).
(3)Temperature regulation should be used as a basic strategy for regulating soil Bio-P concentration during the early stages of soil formation in ecosystem management and restoration practices.
The results of this research can provide a scientific basis for soil restoration and the development of ecological conservation strategies.

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备注/Memo

备注/Memo:
收稿日期(Received date): 2024- 06-12; 改回日期(Accepted date):2024-12- 07
基金项目(Foundation item): 湖北省自然科学基金(2022CFB783)。 [Natural Science Foundation of Hubei Province(2022CFB783)]
作者简介(Biography): 何晓丽(1990-),女,湖北宜城人,博士,副教授,主要研究方向:土壤养分元素的生物地球化学循环。[HE Xiaoli(1990-), female, born in Yicheng, Hubei Province, Ph.D., associate professor, research on the biogeochemical cycling of soil nutrient elements] E-mail: xlhe@hbuas.edu.cn
*通讯作者(Corresponding author): 吴艳宏(1969-),男,博士,研究员,主要研究方向:自然地理学。[WU Yanhong(1969-), male, Ph.D., professor, specialized in physical geography] E-mail: yhwu@imde.ac.cn
更新日期/Last Update: 2024-11-30