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Journal of Zhejiang University (Agriculture and Life Sciences)  2024, Vol. 50 Issue (2): 172-189    DOI: 10.3785/j.issn.1008-9209.2023.07.311
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Rhizosphere priming effect of crops: a critical factor for regulating carbon dynamics in farming land and promoting carbon neutrality
Weiwei ZHENG(),Chao HE,Jingping YANG()
College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, Zhejiang, China
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Abstract  

Soil carbon is an important component of the terrestrial carbon pool, and carbon dynamic balance of input and output, mineralization and immobilization are critical factors in achieving carbon neutrality. Rhizosphere priming effect (RPE) refers to the fact that the presence of living plants significantly affects the carbon dynamics in the plant-soil system, with minor changes affecting soil-atmosphere carbon dynamics. Therefore, the RPE of crops is a vital factor in regulating carbon dynamics and carbon neutrality in farming land. Through a literature review, this paper first summarized the current research status of the effects of various biotic and abiotic factors on the RPE of crops during agricultural practices. Second, this paper summarized the hotspots and challenges in the current studies on the RPE of crops and analyzed their significance to the regulation of soil carbon emissions, elucidating that the existing studies were generally case-specific and lack of universal patterns. Finally, potential strategies for soil carbon regulation and management in agroecosystems were proposed based on the existing studies. This study pointed out the direction for the purposeful regulation of the RPE of crops in agricultural practices and the possible schemes in the field, planting mode and regional scale. This paper can provide theoretical references for eco-agricultural practices to help achieve carbon neutrality as a win-win solution while guaranteeing food security.



Key wordscrop-soil system      rhizosphere priming effect      soil organic carbon      food security      carbon neutrality     
Received: 31 July 2023      Published: 25 April 2024
CLC:  S154.4  
Corresponding Authors: Jingping YANG     E-mail: 22014047@zju.edu.cn;jpyang@zju.edu.cn
Cite this article:

Weiwei ZHENG,Chao HE,Jingping YANG. Rhizosphere priming effect of crops: a critical factor for regulating carbon dynamics in farming land and promoting carbon neutrality. Journal of Zhejiang University (Agriculture and Life Sciences), 2024, 50(2): 172-189.

URL:

https://www.zjujournals.com/agr/10.3785/j.issn.1008-9209.2023.07.311     OR     https://www.zjujournals.com/agr/Y2024/V50/I2/172


作物根际激发效应:调控农田土壤碳动态及助力碳中和的关键因素

土壤碳是陆地碳库的重要组成部分,碳输入及输出、矿化与固定的动态平衡是实现碳中和的关键因素。根际激发效应(rhizosphere priming effect, RPE)是指活体植物的存在会显著影响植物-土壤系统碳动态,其微小变化都会影响宏观尺度上的土壤-大气碳动态。因此,作物RPE是调控农田土壤碳动态和碳中和的主导因子。本文通过文献回顾,首先阐述了农业实践过程中各种生物因素和非生物因素对作物RPE影响的研究现状;其次,归纳总结了当前作物RPE研究中的热点、难点,并分析其对土壤碳排放调控的意义,阐明了当前研究普遍存在案例特异性且缺乏普遍规律;最后,基于已有的研究提出农田生态系统中土壤碳调控和管理优化的潜在策略,为农业实践中有目的地调控作物RPE,在田间、种植模式及区域尺度上提出可能的方案指明了方向。本文可为生态农业实践中保障粮食安全的同时助力碳中和这一双赢方案提供理论参考。


关键词: 作物-土壤系统,  根际激发效应,  土壤有机碳,  粮食安全,  碳中和 
Fig. 1 Global greenhouse gas emissions by sectors from 1990 to 2015 (sources: website of the United States Environ-mental Protection Agency)Greenhouse gas emissions are expressed in CO2 equivalent.
Fig. 2 Annual change trend of number of Chinese literatures related to RPE (A) and the proportion of literatures in each research field (B)
Fig. 3 Distribution of publishing affiliations of Chinese literatures related to RPE (A) and networks of keywords (B)In Fig. B, the node represents a keyword, and the node size represents the number of occurrences of keywords. The threshold value of keyword parameter is set to 2, that is, keywords appear at least twice. Different colors represent different clusters.
Fig. 4 Change trend in the number of English literatures related to RPE over the recent decade

排名

Ranking

研究领域

Research field

国家

Country

机构

Affiliation

作者

Author

1

农业

Agriculture (163)

中国

China (128)

中国科学院

Chinese Academy of Sciences (125)

CHENG Weixin (44)
2

植物科学

Plant sciences (70)

美国

USA (88)

加州大学系统

University of California system (93)

Feike A DIJKSTRA (29)
3

环境科学-生态学

Environmental

sciences-ecology (62)

澳大利亚

Australia (44)

中国科学院大学

University of Chinese

Academy of Sciences (26)

ZHU Biao (22)
4

地质学

Geology (14)

德国

Germany (31)

悉尼大学

The University of Sydney (25)

Yakov KUZYAKOV (13)
5

微生物学

Microbiology (13)

法国

France (18)

北京大学

Peking University (20)

YIN Liming (13)
6

生物多样性保护

Biodiversity conservation (6)

瑞典

Sweden (16)

印第安纳大学系统

Indiana University system (16)

YIN Huajun (11)
7

林学

Forestry (6)

英国

UK (12)

法国国家农业食品与环境研究院

INRAE (13)

LU Jiayu (9)
8

水资源

Water resources (5)

苏格兰

Scotland (12)

法国国家科学研究中心

CNRS (11)

Richard P PHILLIPS (9)
9

科学技术及其他主题

Science technology and other

topics (3)

巴西

Brazil (8)

浙江大学

Zhejiang University (11)

Sebastien FONTAINE (8)
10

生物化学-分子生物学

Biochemistry-molecular

biology (2)

加拿大

Canada (8)

美国能源部

United States Department of Energy (10)

YANG Jingping (7)
Table 1 Top ten rankings of research fields, countries, affiliations, and authors for the numbers of English literatures related to RPE
Fig. 5 Networks of keywords in English literatures related to RPEThe node represents a keyword, and the node size represents the number of occurrences of keywords. The threshold value of keyword parameters is set to 5, that is, keywords appear at least five times. Different colors represent different clusters.
Fig. 6 Hypotheses of regulatory mechanisms of the RPE and concepts of its contribution to carbon neutrality
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