冻融循环条件下生境基材中三种功能微生物数量变化规律研究

doi:10.7522/j.issn.1000-0240.2017.0124

冰川冻土 ›› 2017, Vol. 39 ›› Issue (5): 1122-1129.doi: 10.7522/j.issn.1000-0240.2017.0124

冻融循环条件下生境基材中三种功能微生物数量变化规律研究

张琳瑶^1,2,3, 刘大翔^1,2, 许文年^1,2,3, 童标^2,3

1. 三峡大学防灾减灾湖北省重点实验室, 湖北宜昌 443002;
2. 三峡大学三峡库区生态环境教育部工程研究中心, 湖北宜昌 443002;
3. 三峡大学三峡地区地质灾害与生态环境湖北省协同创新中心, 湖北宜昌 443002

收稿日期:2017-05-25 修回日期:2017-09-28 出版日期:2017-10-25 发布日期:2018-01-27
通讯作者: 刘大翔,E-mail:liudaxiang004@163.com;许文年,E-mail:xwn@ctgu.edu.cn E-mail:liudaxiang004@163.com;xwn@ctgu.edu.cn
作者简介:张琳瑶(1992-),女,2015年在三峡大学获学士学位,现为三峡大学在读硕士研究生,从事边坡防护与生态恢复方面的研究.E-mail:250798607@qq.com
基金资助:
国家重点研发计划项目（2017YFC0504902-02）；国家自然科学基金项目（51708333；51678348）；防灾减灾湖北省重点实验室开放基金项目（2016KJZ13）；湖北省自然科学基金重点实验室项目（2016CFA085）；三峡库区生态环境教育部工程研究中心开放基金（KF2016-05）资助

A study on the change of three functional microorganism quantities in habitat substrate under freezing-thawing cycles

ZHANG Linyao^1,2,3, LIU Daxiang^1,2, XU Wennian^1,2,3, TONG Biao^2,3

1. Key Laboratory of Disaster Prevention and Mitigation, China Three Gorges University, Yichang 443002, Hubei, China;
2. Engineering Research Center of Eco-Environment in Three Gorges Reservoir, Three Gorges University, Yichang 443002, Hubei, China;
3. Collaborative Innovation Center for Geo-Hazards and Eco-Environment in Three Gorges, China Three Gorges University, Yichang 443002, Hubei, China

Received:2017-05-25 Revised:2017-09-28 Online:2017-10-25 Published:2018-01-27

摘要/Abstract

摘要： 为揭示高寒地区典型生境基材中功能微生物数量变化的规律，以黄棕壤土为试验土样，在两种初始含水率条件下，分别制备客土、植被混凝土以及加菌植被混凝土三种不同类型的生境基材进行冻融循环模拟试验，探讨生境基材类型、初始含水率和冻融循环次数对基材中功能微生物数量的影响。试验结果显示：三种基材中功能微生物数量均受冻融循环影响显著，且随冻融循环次数增加总体呈"下降~上升~下降"趋势；冻融循环过程中，三种基材中功能微生物总量存在显著性差异，排序为：加菌植被混凝土 > 植被混凝土 > 客土，且固氮、解钾微生物数量显著低于解磷微生物；含水率为22%的基材中功能微生物总量普遍高于含水率为18%的基材。研究结果表明，加菌植被混凝土的肥力、抗冻性相比客土和植被混凝土有一定程度提升，但仍需对现有功能菌剂配方加以改进，以适应高寒地区冻融环境。

关键词: 生境基材, 冻融循环, 初始含水率, 功能微生物数量

Abstract: To reveal the quantitative change of functional microbes in typical habitat substrate in the alpine regions, the freezing-thawing cycle test was conducted. Using yellow-brown loam as soil specimen, three habitat substrates including carrying soil, vegetation concrete and vegetation concrete adding microorganism were prepared with two kinds of initial moisture content. According to the test, the effects of habitat substrate type, initial moisture content and frequency of freezing-thawing cycle on the functional microbe quantities in substrate were explored. The results were as follows:(1) The functional microbe quantities in the three kinds of substrates were significantly affected by the frequency of freezing-thawing cycle, with a change trend of descending, rising and then decreasing again with the increase of cycle times. (2) During the freezing-thawing cycles, there were significant differences in the total quantity of functional microbes among three substrates; the sequence of significant variance was:vegetation concrete adding microorganism > vegetation concrete > carrying soil; the quantity of nitrogen fixation and potassium solubilizing of microorganisms were significantly lower than the quantity of phosphate-solubilizing. (3) The total quantity of functional microbes in the substrate with an initial moisture content of 22% was higher than that with an initial moisture content of 18%. According to the above results, the frost resistance of vegetation concrete adding microorganism is higher than that of carrying soil and vegetation concrete, while the functional microorganisms agent still needs to be improved to adapt to the freezing-thawing environment in the alpine regions.

Key words: habitat substrate, freezing-thawing cycle, initial moisture content, functional microbe quantity

中图分类号:

Q938

张琳瑶, 刘大翔, 许文年, 童标. 冻融循环条件下生境基材中三种功能微生物数量变化规律研究[J]. 冰川冻土, 2017, 39(5): 1122-1129.

ZHANG Linyao, LIU Daxiang, XU Wennian, TONG Biao. A study on the change of three functional microorganism quantities in habitat substrate under freezing-thawing cycles[J]. JOURNAL OF GLACIOLOGY AND GEOCRYOLOGY, 2017, 39(5): 1122-1129.

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冻融循环条件下生境基材中三种功能微生物数量变化规律研究

A study on the change of three functional microorganism quantities in habitat substrate under freezing-thawing cycles

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