数字农科院2.0

Arbuscular mycorrhiza changes plant facilitation patterns and increases resource use efficiency in intercropped annual plants

文献类型： 外文期刊

作者： Shuang Guo Zhu;Hai Xia Duan;Hong Yan Tao;Li Zhu;Rui Zhou;Yu Miao Yang;Xiao Lin Zhang;Wen Ying Wang;Hao Zhu;Wei Zhang;Ren Qing Wang;Xiu Ping Tao;You Cai Xiong

作者机构：

关键词： AMF;Intercropping;Phosphorus;Plant–plant interaction;Soil moisture

期刊名称： Applied Soil Ecology

ISSN： 0929-1393

年卷期： 2023 年 191 卷

页码：

收录情况： SCIE（2023版）

摘要： Arbuscular mycorrhizal fungi (AMF) play a vital role in mediating rhizosphere interactions and plant growth, especially in resource-constrained soils. However, few studies have documented the effects of AMF on plant–plant interaction patterns and resource use efficiency along stress gradients. In this study, a growth environment-controlled experiment was carried out to evaluate the effects of AMF inoculation on maize-grass pea intercropping along three phosphorus (P) and two water gradients. The data indicated that soil water and P availability determined the plant interspecific interaction pattern, and that interaction was strongly mediated by AMF inoculation. Grass pea and maize were mutually facilitated under low P and water conditions and transitioned to a new pattern, i.e., that maize was facilitated but grass pea was neutral role or facilitator with increasing resource availability. The facilitative effect was particularly significant under P- and water-deficient conditions. Moreover, the transition of the plant–plant interaction pattern was mechanically driven by improving rhizospheric phosphatase activities by 5.08–20.02 %, rhizospheric acidification and enhanced microbial activities under resource deficit conditions. Critically, AMF inoculation was observed to significantly improve rhizospheric soil P availability and microbial biomass (p < 0.05); however, it enhanced the complementary utilization of P and water and weakened interspecific competition under high-resource conditions. Therefore, AMF inoculation positively transformed the plant–plant interaction pattern along resource gradients for higher P, nitrogen and water use efficiency. This study validates the context-dependent interspecific interaction and the role of AMF in optimizing resource use in a nutrient-impoverished intercropping system.

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