Acta Agrestia Sinica ›› 2025, Vol. 33 ›› Issue (1): 70-78.DOI: 10.11733/j.issn.1007-0435.2025.01.009

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The Effects of Invasion Plant Parthenium hysterophorus on Soil Enzyme Activity and Microbial Nutrient Limitation

WANG Han-zhi1, MA Xiao-ming1, FANG Xue-mei1, YIN Rui1, WANG Wen-long1, DENG Xin-xin2, ZHANG Lin3, DONG Xian-yong2, Lamu Nima1,4, LIU Lin1   

  1. 1. Grassland Science and Technology College, Sichuan Agricultural University, Chengdu, Sichuan Province 611130, China;
    2. China Three Gorges Construction Engineering Corporation, Beijing 101100, China;
    3. Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization & Ecological Restoration and Biodiversity Conservation Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, Sichuan Province 610041, China;
    4. Gêrzê County Bureau of Agriculture and Rural, Affairs of Agriculture and Animal Husbandry Technology Extension Station, Ali, Xizang 859200, China
  • Received:2024-04-23 Revised:2024-06-05 Published:2025-01-22

入侵植物银胶菊对土壤酶活性及微生物养分限制的影响

王汉之1, 马小明1, 方雪梅1, 殷瑞1, 王文龙1, 邓鑫欣2, 张林3, 董先勇2, 尼玛拉姆1,4, 刘琳1   

  1. 1. 四川农业大学草业科技学院, 四川 成都 611130;
    2. 中国三峡建工(集团)有限公司, 北京 101100;
    3. 中国科学院山地生态恢复与生物资源利用重点实验室/生态恢复与生物多样性保育四川省重点实验室/中国科学院成都生物研究所, 四川 成都 610041;
    4. 西藏阿里地区改则县农业农村局农牧业技术推广站, 西藏 阿里 859200
  • 通讯作者: 刘琳,E-mail:liulinsky@126.com
  • 作者简介:王汉之(1999-),男,汉族,甘肃兰州人,硕士研究生,主要从事入侵生态学研究,E-mail:2197065545@qq.com
  • 基金资助:
    中国三峡(建工)集团有限公司科研项目(JG-EP-030222001,JG-EP-030222002)资助

Abstract: To explore the effects and mechanisms of plant invasion on soil enzyme activity and microbial nutrient limitations,this study focused on the invasive plant Parthenium hysterophorus in the Wu Dongde Reservoir area along the Jinsha River,using the native plant Cynodon dactylon as a control. The study analyzed the differences in soil physicochemical properties,extracellular enzyme activities,and microbial nutrient limitations in the rhizosphere and non-rhizosphere soils of both plants. The results showed that the rhizosphere soil of P. hysterophorus exhibited significantly higher alkaline phosphatase and β-1,4-glucosidase activities,as well as higher available phosphorus content compared to C. dactylon,while β-1,4-N-acetylglucosaminidase activity showed the opposite trend. Additionally,the vector angle and length in both the rhizosphere and non-rhizosphere soils of P. hysterophorus were significantly higher than those of C. dactylon,indicating that soil microbes in P. hysterophorus were more severely limited by both carbon and phosphorus. In summary,the invasion of P. hysterophorus significantly enhanced the hydrolytic enzyme activities related to carbon and phosphorus in the rhizosphere soil and exacerbated the carbon and phosphorus limitations of soil microbes in both the rhizosphere and non-rhizosphere soils.

Key words: Invasion plant, Enzyme stoichiometric ratio, Rhizosphere, Nutrient cycle, Jinsha River

摘要: 为探究植物入侵对土壤酶活性及微生物营养限制的影响及其机制,本研究以金沙江乌东德电站库区入侵植物银胶菊(Parthenium hysterophorus)为研究对象,乡土植物狗牙根(Cynodon dactylon)为对照,分析它们根围(根际和非根际)土壤理化性质、胞外酶活性和微生物养分限制的差异。结果显示:银胶菊根际土碱性磷酸酶(Alkaline phosphatase,AP)和β-1,4-葡萄糖苷酶(β-Glucosidase,BG)活性及速效磷养分含量显著高于狗牙根,而β-1,4-N-乙酰氨基葡萄糖苷酶(N-Acetylglucosidase,NAG)则相反(P<0.05);银胶菊根际和非根际矢量角度(>45°)和长度均显著高于狗牙根(P<0.05),表明银胶菊土壤微生物受碳和磷的共同限制,且限制程度均高于狗牙根。综上,银胶菊入侵使根际土壤碳磷水解酶活性明显提升,且显著加剧了根际非根际土壤微生物碳、磷限制。

关键词: 入侵植物, 酶化学计量学, 根际, 养分循环, 金沙江

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