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草业学报 ›› 2025, Vol. 34 ›› Issue (8): 165-178.DOI: 10.11686/cyxb2024362

• 研究论文 • 上一篇    

磷添加和丛枝菌根真菌对羊草根系构型以及植株养分吸收利用的影响

郭亮1(), 胡雨彤1,2,3(), 廖雨1, 龚成毓1, 杨晓燕1, 管上淇1, 鞠成琦1   

  1. 1.新疆农业大学资源与环境学院,新疆 乌鲁木齐 830052
    2.新疆土壤与植物生态过程重点实验室,新疆 乌鲁木齐 830052
    3.新疆种植业绿色生产工程技术研究中心,新疆 乌鲁木齐 830052
  • 收稿日期:2024-09-24 修回日期:2024-11-11 出版日期:2025-08-20 发布日期:2025-06-16
  • 通讯作者: 胡雨彤
  • 作者简介:E-mail: hyt_533@163.com
    郭亮(1998-),男,新疆和田人,在读硕士。E-mail: 18197778366@163.com
  • 基金资助:
    新疆维吾尔自治区自然科学基金(2022D01A187)

The impact of phosphorus addition and arbuscular mycorrhizal fungi on root architecture and nutrient utilization in Leymus chinensis

Liang GUO1(), Yu-tong HU1,2,3(), Yu LIAO1, Cheng-yu GONG1, Xiao-yan YANG1, Shang-qi GUAN1, Cheng-qi JU1   

  1. 1.College of Resources and Environment,Xinjiang Agricultural University,Urumqi 830052,China
    2.Key Laboratory of Soil and Plant Ecological Processes,Urumqi 830052,China
    3.Xinjiang Green Production Engineering Research Center of Crop Industry,Urumqi 830052,China
  • Received:2024-09-24 Revised:2024-11-11 Online:2025-08-20 Published:2025-06-16
  • Contact: Yu-tong HU

摘要:

本研究探讨了磷添加和丛枝菌根真菌(AMF)侵染对羊草根系构型及养分吸收利用的影响。试验采用根袋盆栽方法,设置4个磷水平处理(P0: 0 mg·kg-1, P1: 11.32 mg·kg-1, P2: 22.63 mg·kg-1, P3: 33.95 mg·kg-1)和两种AMF处理(接种与未接种)交互作用共8个处理,每个处理重复5次。结果表明,磷和AMF处理显著影响羊草的根系生物量,接种AMF显著提高P1和P2处理下的根系生物量。AMF处理提高了总根长和总生物量,但对根平均直径、总根体积和分枝数有降低趋势。土壤理化性质分析表明,AMF处理提高了碱性磷酸酶活性和速效磷含量。养分分析表明AMF接种和磷处理显著影响植株P含量,降低了氮磷比,且AMF在高磷处理下提高了磷利用效率。此外,磷和AMF的交互作用对分形维数、分形丰度、根袋内pH、土壤速效磷和羊草地上部分磷含量均表现出显著影响。总体而言,P1施磷和AMF接种显著改善了羊草的根系生物量和构型,提高了养分吸收与利用效率。

关键词: 羊草, 丛枝菌根真菌, 根系构型, 养分吸收, 养分利用

Abstract:

This study investigated the effects of phosphorus addition and arbuscular mycorrhizal fungus (AMF) inoculation on the root architecture and nutrient absorption of Leymus chinensis. A pot experiment was conducted with four phosphorus levels (P0: 0 mg·kg-1; P1: 11.32 mg·kg-1; P2: 22.63 mg·kg-1; P3: 33.95 mg·kg-1) and two AMF treatments (inoculated and uninoculated), resulting in a total of eight treatments, each with five replicates. It was found that phosphorus and AMF treatments significantly affected root biomass of L. chinensis. Root biomass was significantly increased under P1 and P2 treatments, while AMF treatment increased total root length and total biomass but tended to decrease root average diameter, root volume, and number of branches. Soil physicochemical analysis indicated that AMF treatment enhanced alkaline phosphatase activity and soil available phosphorus content. Nutrient analysis revealed that AMF inoculation and phosphorus treatment significantly increased plant phosphorus content, reduced the nitrogen to phosphorus ratio, and increased phosphorus utilization efficiency (PUE) under high phosphorus conditions. Moreover, a significant interaction was observed between phosphorus and AMF, characterized by significant change in fractal dimension, fractal abundance, pH inside root bags, soil available phosphorus, and phosphorus content in the aboveground parts of L. chinensis. In summary, appropriate phosphorus application and P1 AMF inoculation significantly improved root biomass and architecture of L. chinensis, enhancing nutrient absorption and utilization efficiency.

Key words: Leymus chinensis, arbuscular mycorrhizal fungi, root architecture, nutrient absorption, nutrient utilization