Acta Agrestia Sinica ›› 2022, Vol. 30 ›› Issue (3): 594-602.DOI: 10.11733/j.issn.1007-0435.2022.03.011

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Effects of Applying Organic Fertilizer on Rhizosphere Microorganisms and Soil Physical and Chemical Properties of Elymus nutans

MA Kun1, LU Guang-xin1, DENG Ye2, YAN Hui-lin1, WANG Ying-cheng1, ZHAO Yang-an1, ZHANG Hai-juan1, ZHOU Xue-li3, DOU Sheng-yun3   

  1. 1. College of Agriculture and Animal Husbandry, Qinghai University, Xining, Qinghai Province 810016, China;
    2. Research Center for Ecological Environment, Chinese Academy of Sciences, Beijing 100080, China;
    3. Qinghai Province Grassland Improvement Experimental Station, Gonghe, Qinghai Province 813000, China
  • Received:2021-07-21 Revised:2021-08-29 Published:2022-03-30

有机肥对垂穗披碱草根际微生物及土壤理化性质的影响

马坤1, 芦光新1, 邓晔2, 颜珲璘1, 王英成1, 赵阳安1, 张海娟1, 周学丽3, 窦声云3   

  1. 1. 青海大学农牧学院, 青海 西宁 810016;
    2. 中国科学院生态环境研究中心, 北京 100080;
    3. 青海省草原改良试验站, 青海 共和 813000
  • 通讯作者: 芦光新,E-mail:lugx74@qq.com;邓晔,E-mail:yedeng@rcees.ac.cn
  • 作者简介:马坤(1997-),男,甘肃定西人,硕士研究生,主要从事高寒草地微生物多样性及功能利用研究,E-mail:2314428497@qq.com
  • 基金资助:
    青海省科技厅基础研究面上计划项目(2021-ZJ-915);2021年度青海省“昆仑英才·高端创新创业人才”计划项目资助

Abstract: To investigate the effects of organic fertilizer application rate on soil microbial community structure and physical and chemical properties of artificial grassland after planting,Elymus nutans ‘Aba’ was used as experimental material,and three treatments,no fertilizer (CK),50% organic fertilizer and 75% organic fertilizer,were set. The results showed that compared with CK,the total nitrogen and organic matter contents in the rhizosphere soil were increased and the pH value of the soil was decreased when organic fertilizer was applied. The composition of the soil rhizosphere microbial community was changed with the addition of organic fertilizer,and the relative abundance of dominant bacteria actinomycetes and basidiomycetes was increased with the addition of organic fertilizer at 50%. The relative abundance of Gibberellum and endophytic fungi were increased when organic fertilizer was 75%. The results of Beta diversity analysis showed that the bacterial and fungal community structures were significantly different between the control and each treatment. The results showed that increased application of organic fertilizer could improve soil rhizosphere microbial community structure,further improve soil health,and provide suitable soil microbial conditions for herbage growth in the alpine region.

Key words: Elymus nutans, Organic fertilizer, Soil physical and chemical properties, Rhizosphere microorganisms

摘要: 为了探究有机肥施肥量对人工草地建植后土壤微生物群落结构及理化性质的影响,以‘阿坝’垂穗披碱草(Elymus nutans ‘Aba’)为试验材料,设置不施肥(CK),50%,75%有机肥三个处理,测定土壤理化性质及土壤微生物结构,结果表明:与CK相比,有机肥施用当年,提高牧草根际土壤总氮和有机质含量(P<0.05),降低了土壤pH值(P<0.05);有机肥的添加引起了土壤根际微生物群落组成的变化,有机肥施用量为50%时增加了优势菌放线菌门、担子菌门的相对丰度;有机肥施用量为75%时明显增加了赤霉菌属、内生真菌属的相对丰度;Beta多样性分析结果表明,对照和各处理细菌和真菌群落结构明显不同。本研究结果表明,增施有机肥能够改善土壤根际微生物群落结构,进一步改善土壤健康状况,为高寒地区牧草生长提供适宜的土壤微生物条件。

关键词: 垂穗披碱草, 有机肥, 土壤理化性质, 根际微生物

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