Soil phosphorus availability modulates root exudation under long-term nitrogen fertilization
文献类型： 外文期刊
作者： Jiang, Zheng 1 ; Wang, Cong 1 ; Sun, Huifeng 1 ; Zhang, Xianxian 1 ; Zhang, Jining 1 ; Hai, Liuming 1 ; Zhou, Sheng 1 ;
作者机构： 1.Shanghai Acad Agr Sci, Ecoenvironm Protect Res Inst, 1000 Jinqi Rd, Shanghai 201403, Peoples R China
2.Shanghai Engn Res Ctr Low carbon Agr SERCLA, Shanghai 201415, Peoples R China
3.Minist Agr & Rural Affairs, Key Lab Low Carbon Green Agr Southeastern China, Shanghai 201403, Peoples R China
4.Shanghai Ocean Univ, Coll Fisheries & Life Sci, Shanghai 201306, Peoples R China
关键词： Root exudation; Root morphological traits; N fertilization; Soil P availability; Rice paddy ecosystems
期刊名称：SOIL & TILLAGE RESEARCH （ 影响因子：6.8； 五年影响因子：7.8 ）
ISSN： 0167-1987
年卷期： 2025 年 254 卷
页码：
收录情况： SCI
摘要： Root carbon (C) investment in exchange for phosphorus (P) is a pivotal nutrient acquisition strategy that profoundly impacts soil biogeochemical processes and maintains the functional stability of rice paddy ecosystems. However, the response patterns of C cost-P benefit strategies to external nitrogen (N) input in rice paddies remain unclear. Therefore, root C exudation rates were repeatedly measured using an in situ collection method under control, low N (100 kg ha-1), and high N (200 kg ha-1) treatments. Additionally, soil properties and root morphology were analyzed to identify the main factors influencing variations in root exudation. The results showed that root C exudation rates under high N application increased by 55.1 % compared to the control. These differences were primarily linked to N-induced changes in soil P availability, root biomass, root length, root surface area, and root volume. Consequently, understanding the interplay between soil nutrient availability and root exudation is crucial for optimizing fertilization strategies and improving nutrient use efficiency in rice cultivation systems.
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