草地学报 ›› 2026, Vol. 34 ›› Issue (4): 1205-1214.DOI: 10.11733/j.issn.1007-0435.2026.04.007

• 研究论文 • 上一篇    

大狼毒主要化感物质对山地草甸土壤磷转化的影响

肖伟, 麻来香, 段蕊, 罗钦, 肖雪, 牛琼梅, 次旺, 单贵莲, 初晓辉   

  1. 云南农业大学动物科学技术学院, 云南 昆明 650201
  • 收稿日期:2025-06-21 修回日期:2025-10-10 发布日期:2026-04-15
  • 通讯作者: 单贵莲,E-mail:shanguilian8203@126.com;初晓辉,E-mail:478491637@qq.com
  • 作者简介:肖伟(2000-),男,藏族,云南香格里拉人,硕士研究生,主要从事草地资源利用与可持续管理研究,E-mail:1850834932@qq.com;麻来香(2001-),女,傈僳族,云南芒市人,硕士研究生,主要从事草地生态恢复学研究,E-mail:368696695@qq.com;
  • 基金资助:
    国家自然科学基金项目(32560924);云南省农业联合专项(202501BD07001-001);云南省万人计划青年拔尖人才专项(YNWR-QNBJ-2018-031);云南省水利科技重大专项(2023BG204001)资助

Effects of Major Allelopathic Substances from Euphorbia jolkinii Boiss on Phosphorus Transformation in Mountain Meadow Soil

XIAO Wei, MA Lai-xiang, DUAN Rui, LUO Qin, XIAO Xue, NIU Qiong-mei, CI Wang, SHAN Gui-lian, CHU Xiao-hui   

  1. College of Animal Science and Technology, Yunnan Agricultural University, Kunming, Yunnan Province 650201, China
  • Received:2025-06-21 Revised:2025-10-10 Published:2026-04-15

摘要: 为探究滇西北山地草甸的退化指示物种大狼毒(Euphorbia jolkinii Boiss)的化感作用机制,本研究通过在土壤中添加不同浓度的4-硝基苯酚(4-Nitrophenol,4-NP)和2-苯乙胺(2-Phenethylamine,2-PEA),分析其对土壤磷转化及相关指标的影响。结果显示,两种化感物质均显著提高了土壤微生物量磷、铝结合磷、钙结合磷和中等活性有机磷含量,降低了pH值及铁结合态磷、闭蓄态磷、中等稳定性与高稳定性有机磷含量(P<0.05),并促进细菌和放线菌繁殖。4-NP显著增强植酸酶活性而降低酸性磷酸酶活性;2-PEA则显著提高酸性磷酸酶、植酸酶和磷酸二酯酶活性,降低碱性磷酸酶活性(P<0.05)。综上,4-NP和2-PEA的添加会直接影响土壤的理化性质,改变有机磷及无机磷各组分含量,间接实现土壤养分在其根际环境中的积累,促进其自身进一步扩张。

关键词: 大狼毒, 化感物质, 山地草甸, 土壤磷转化

Abstract: To explore the allelopathic mechanism of Euphorbia jolkinii Boiss, a degradation indicator species of mountain meadows in northwest Yunnan, in this study we analyzed its effects on soil phosphorus transformation and related indicators by adding different concentrations of 4-Nitrophenol (4-NP) and 2-Phenethylamine (2-PEA) to the soil. The results showed that both allelochemicals significantly increased soil microbial biomass phosphorus, aluminum-bound phosphorus, calcium-bound phosphorus, and moderately reactive organic phosphorus content, decreased pH and iron-bound phosphorus, occluded phosphorus, moderately stable and highly stable organic phosphorus content (P<0.05), and promoted the proliferation of bacteria and actinomycetes. 4-NP significantly enhanced phytase activity and reduced acid phosphatase activity. 2-PEA significantly increased acid phosphatase, phytase, and phosphodiesterase activities, while reduced alkaline phosphatase activity (P<0.05). In summary, the addition of 4-NP and 2-PEA directly affects soil physicochemical properties, changes the content of organic and inorganic phosphorus components, indirectly achieves the accumulation of soil nutrients in its rhizosphere environment, and promotes its further expansion.

Key words: Euphorbia jolkinii Boiss, Allelochemicals, Mountain meadows, Soil phosphorus transformation

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