氮磷添加对呼伦贝尔草甸草原药用植物群落学特征的影响  

Effects of Nitrogen and Phosphorus Addition on Medicinal Plant Community Characteristics in the Hulunbuir Meadow Steppe

作　　者：潘昱臻 陈力 陈金宇 赵丹 叶得力 王智慧[1,3] 王洪义 PAN Yuzhen;CHEN Li;CHEN Jinyu;ZHAO Dan;YE Deli;WANG Zhihui;WANG Hongyi(College of Horticulture and Landscape,Heilongjiang Bayi Agricultural University,Daqing 163319,China;Qinghai Yellow Hydropower Development Co.,Ltd,Xining 810001,China;Key Laboratory of Low-Carbon Green Agriculture in Northeastern China,Ministry of Agriculture and Rural Affairs,Daqing 163319,China)

机构地区：[1]黑龙江八一农垦大学园艺园林学院,黑龙江大庆163319 [2]青海黄河上游水电开发有限责任公司,青海西宁810001 [3]农业农村部东北平原农业绿色低碳重点实验室,黑龙江大庆163319

出　　处：《中国草地学报》2024年第6期117-125,共9页Chinese Journal of Grassland

基　　金：国家自然科学基金面上项目(32271650);中国博士后科学基金(2022M721734);青海省重大科技专项(2021-SF-A7-2)资助。

摘　　要：草甸草原是我国药用植物重要的资源库,但药用植物多样性易受人为活动和全球变化影响。本文基于呼伦贝尔草甸草原氮磷添加控制试验,研究了连续氮磷添加对药用植物群落学特征的影响。结果表明:(1)氮添加显著降低而磷添加显著增加豆科药用植物的盖度和重要值;(2)氮添加显著降低了豆科和其他科药用植物的多样性,磷添加显著提高豆科药用植物的多样性,氮、磷添加与年份对各类群药用植物的物种多样性没有显著的交互作用;(3)3年的养分添加对菊科药用植物类群多样性无显著影响;(4)氮磷共同添加显著降低其他科药用植物的重要值和多样性。综上,不同药用植物类群的群落学特征对氮、磷添加的响应具有相对独立性,施加磷肥有利于保护草甸草原豆科药用植物,氮磷同施会降低其他科药用植物多样性。Meadow steppes are a vital resource for medicinal plants in China,but their diversity faces threats from anthropogenic activities and global change.This study investigated the effects of continuous,controlled nitrogen(N)and phosphorus(P)additions on community characteristics of medicinal plants in the Hulunbuir meadow steppe.The results showed that:(1)N addition significantly decreased,while P addition significantly increased,the coverage and importance value of leguminous medicinal plants.(2)N addition significantly reduced the diversity of both leguminous and other medicinal plants.Conversely,P addition significantly increased the diversity of leguminous medicinal plants.Notably,there was no significant interaction effects of N and P addition and year on the species diversity of either medicinal plant group.(3)Three years of nutrient addition did not significantly affect the diversity of medicinal plant of Compositae family.(4)Co-addition of N and P significantly reduced the importance value and diversity of other medicinal plant group.In conclusion,the responses of different medicinal plant groups to N and P addition were relatively independent.P fertilization appears beneficial for the conservation of leguminous medicinal plants in meadow steppes,while co-addition of N and P fertilizer may decrease the diversity of other medicinal plants.

关 键 词：氮添加 磷添加 药用植物 多样性 

分 类 号：S812[农业科学—草业科学]