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生态学杂志 ›› 2010, Vol. 29 ›› Issue (03): 523-528.

• 研究报告 • 上一篇    下一篇

土壤真菌差异影响入侵豚草与本地植物生长及互作

于文清1,2;张利莉1;刘万学2**;万方浩2   

  1. 1塔里木大学生命科学学院,新疆生产建设兵团塔里木盆地生物资源保护利用重点实验室,新疆阿拉尔 843300;2中国农业科学院植物保护研究所植物病虫害生物学国家重点实验室,北京 100094
  • 出版日期:2010-03-10 发布日期:2010-03-10

Soil fungi differentially affect the growth of and interaction between invasive weed Ambrosin artemisiifolia and native plants.

YU Wen-qing1,2;ZHANG Li-li1;LIU Wan-xue2;WAN Fang-hao2   

  1. 1Key Laboratory of Protection &|Utilization of Biological Resource in Tarim Basin of Xinjiang Production and Construction Corps, School of Life Sciences,Tarim University, Alar 843300, Xinjiang, China;2State Key Laboratory forBiology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100094, China
  • Online:2010-03-10 Published:2010-03-10

摘要: 采用温室盆栽实验,研究了本地植物土壤与豚草入侵地土壤中真菌对外来植物豚草和2种本地植物生长及对豚草与本地植物互作的影响。结果表明:在本地植物土壤中,杀真菌剂处理下,豚草单独种植、与本地植物狗尾草混合种植或与紫花苜蓿混合种植时,其生物量分别比未采用杀真菌剂处理高46.7%、39.1%和90.5%,但杀真菌剂对狗尾草及紫花苜蓿的生物量却没有显著影响;在豚草入侵地土壤中,与未采用杀真菌剂的处理相比,杀真菌剂处理使单独种植的豚草的生物量降低了44.3%,同时杀菌剂也降低了本地植物狗尾草和紫花苜蓿的生物量,但杀真菌剂的施用对与狗尾草或紫花苜蓿混合种植的豚草的生物量却没有显著影响;进一步比较了本地植物土壤和豚草入侵土壤中真菌对植物生长的反馈作用,结果显示,在本地植物土壤中,真菌对豚草生长呈现负反馈,但在豚草入侵地土壤中,真菌对单独种植的豚草表现出正反馈,而且与本地植物土壤比较,土壤真菌对与本地植物混合种植的豚草的负反馈作用明显变小了。本研究结果为深入研究豚草入侵的土壤微生物学机制提供了一定的实验证据。

关键词: 土地利用变化, 土壤有机碳, 含量与密度

Abstract: A greenhouse pot experiment was conducted to investigate the effects of soil fungi in native plants-dominated soil (NS) and Ambrosin artemisiifolia
-invaded soil (IS) on the growth of and interaction between invasive weed A. artemisiifolia and native plants. On NS, the biomass of A. artemisiifolia
 from monoculture A. artemisiifolia, mixed culture A. artemisiifolia and native plant S. viridis, and mixed culture A. artemisiifolia and native p
lant M. sativa in fungicide treatment was 46.7%, 39.1%, and 90.5% higher than that in non-fungicide treatment, respectively, but no significant difference was observed in the biomass of S. viridis and M. sativa between fungicide and nonfungicide treatments. On IS, compared with that in nonfungicide
treatment, the biomass of A. artemisiifolia from monoculture A. artemisiifolia in fungicide treatment was decreased by 44.3%. Fungicide application also decreased the biomass of the two native plants in mixed cultures, but the effect was not significant. The feedback of soil fungi in NS and IS on plant growth
and competition was further analyzed. In NS, there was a negative feedback of soil fungi on the growth of A. artemisiifolia, no matter in monoculture or in mixed culture; while in IS, the feedback on the growth of monoculture A. artemisiifolia became positive, and the negative feedback on the growth of mixed culture A. artemisiifolia became less. This study supplied some experimental evidences for the further research on the soil microbial mechanism during A. artemisiifolia invasion.

Key words: Land use change, Soil organic carbon, Concentration and inventory