磷添加对毛竹鞭根磷获取策略的影响

doi:10.13287/j.1001-9332.202510.004

应用生态学报 ›› 2025, Vol. 36 ›› Issue (10): 3061-3068.doi: 10.13287/j.1001-9332.202510.004

磷添加对毛竹鞭根磷获取策略的影响

王晨^1,2,3, 彭逸龙^1,2, 刘欣雨^1,2, 曹婷婷^1,2, 施曼^1,2, 王志康^1,2, 李全^1,2*, 宋新章^1,2

¹浙江农林大学森林食物资源挖掘与利用全国重点实验室, 杭州 311300;
²浙江农林大学竹业科学与技术教育部重点实验室, 杭州 311300;
³中国科学院华南植物园, 广州 510650

收稿日期:2025-06-11 修回日期:2025-08-07 出版日期:2025-11-04 发布日期:2026-05-04
通讯作者: *E-mail: quanli@zafu.edu.cn
作者简介:王晨, 男, 2003年生, 硕士研究生。主要从事毛竹林生态系统磷循环研究。E-mail: 3021160772@qq.com
基金资助:
浙江省自然科学基金项目(LQ23C160006)、国家自然科学基金项目(32125027,32401344)和浙江省大学生科技创新活动计划暨新苗人才计划项目(2024R412A004)

Effects of phosphorus addition on phosphorus acquisition strategies in Phyllostachys edulis rhizome roots

WANG Chen^1,2,3, PENG Yilong^1,2, LIU Xinyu^1,2, CAO Tingting^1,2, SHI Man^1,2, WANG Zhikang^1,2, LI Quan^1,2*, SONG Xinzhang^1,2

¹National Key Laboratory for Development and Utilization of Forest Food Resources, Zhejiang A&F University, Hangzhou 311300, China;
²Key Laboratory of Bamboo Science and Technology of Ministry of Education, Zhejiang A&F University, Hangzhou 311300, China;
³South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China

Received:2025-06-11 Revised:2025-08-07 Online:2025-11-04 Published:2026-05-04

摘要/Abstract

摘要： 为揭示毛竹林在低磷胁迫下维持高生产力的根系磷获取策略,本研究通过原位磷添加试验(对照0 kg P·hm^-2·a^-1、低磷50 kg P·hm^-2·a^-1和高磷100 kg P·hm^-2·a^-1),分析磷添加对毛竹鞭根形态和生理特征、根系分泌物和菌根性状的调控机制。结果表明:与对照相比,磷添加显著增加了比表面积(低磷:19.1%;高磷:23.4%)、根系氮(低磷:42.6%;高磷:37.7%)和磷含量(低磷:83.8%;高磷:115.3%),但显著抑制了磷酸酶活性(低磷:22.2%;高磷:30.4%)和丛枝菌根真菌(AMF)侵染率(低磷:24.1%;高磷:25.3%);低磷与高磷处理间无显著差异。磷添加处理显著提升根际土壤pH值、柠檬酸磷、酶解磷、盐酸磷及微生物生物量碳、氮、磷。其中,高磷处理柠檬酸磷、酶解磷和盐酸磷含量显著高于低磷处理。根际土壤磷组分与根系比表面积、磷酸酶活性及AMF侵染率呈显著相关,表明根际土壤磷组分是驱动鞭根磷获取途径转变的重要因子。磷添加处理下毛竹鞭根由“分泌物-菌根共生”资源保守型途径向“高表面积”的资源获取型途径转变。

关键词: 毛竹, 根系形态性状, 丛枝菌根真菌, 根系分泌物, 磷组分

Abstract: To elucidate the root phosphorus (P) acquisition strategies of Phyllostachys edulis to maintain high productivity under P deficiency, we conducted an in situ P addition experiment (0, 50, 100 kg P·hm^-2·a^-1 defined as CK, low-P (LP), and high-P (HP) addition). We investigated the regulatory effects of P addition on morphological and physiological traits of rhizome root, root exudates, and mycorrhizal symbiosis characteristics. The results showed that P addition significantly increased specific root surface area (LP:19.1%; HP:23.4%), root nitrogen (LP:42.6%; HP:37.7%) and P contents (LP:83.8%; HP:115.3%), but significantly decreased phosphatase activity (LP:22.2%; HP:30.4%) and arbuscular mycorrhizal fungi (AMF) infection rate (LP:24.1%; HP:25.3%). There were no significant differences between low-P and high-P treatments for these impacts. P addition significantly increased rhizosphere soil pH, citrate-P, enzyme-P, HCl-P and microbial biomass carbon, nitrogen and P in the rhizosphere soil. Notably, citrate-P, enzyme-P, and HCl-P contents in HP treatment were significantly higher than those in LP treatment. There were significant correlations between rhizosphere soil P fractions and specific root surface area, phosphatase activity, as well as AMF infection rate, indicating that rhizosphere soil P fractions were important drivers of P acquisition pathways in rhizome roots. Under P addition, rhizome roots shifted from a conservative pathway relying on “root exudation and mycorrhizal symbiosis” to an acquisitive pathway characte-rized by “high surface area”.

Key words: Moso bamboo, root morphological trait, arbuscular mycorrhizal fungi, root exudate, phosphorus fraction

王晨, 彭逸龙, 刘欣雨, 曹婷婷, 施曼, 王志康, 李全, 宋新章. 磷添加对毛竹鞭根磷获取策略的影响[J]. 应用生态学报, 2025, 36(10): 3061-3068.

WANG Chen, PENG Yilong, LIU Xinyu, CAO Tingting, SHI Man, WANG Zhikang, LI Quan, SONG Xinzhang. Effects of phosphorus addition on phosphorus acquisition strategies in Phyllostachys edulis rhizome roots[J]. Chinese Journal of Applied Ecology, 2025, 36(10): 3061-3068.

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磷添加对毛竹鞭根磷获取策略的影响

Effects of phosphorus addition on phosphorus acquisition strategies in Phyllostachys edulis rhizome roots

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