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中国农学通报 ›› 2021, Vol. 37 ›› Issue (3): 90-97.doi: 10.11924/j.issn.1000-6850.2020-00015

所属专题: 生物技术 农业气象

• 资源·环境·生态·土壤·气象 • 上一篇    下一篇

大气CO2浓度倍增对宁夏枸杞根区土壤微生物与酶活性的影响

谢云(), 郭芳芸, 曹兵()   

  1. 宁夏大学农学院,银川 750021
  • 收稿日期:2020-04-07 修回日期:2020-06-08 出版日期:2021-01-25 发布日期:2021-01-26
  • 通讯作者: 曹兵
  • 作者简介:谢云,女,1996年出生,甘肃白银人,硕士研究生,主要从事果树学方面的研究。通信地址:750021 宁夏银川西夏区贺兰山西路489号 宁夏大学农学院,Tel:19995280476,Email: 877522958@qq.com
  • 基金资助:
    国家自然科学基金“大气CO2浓度升高对宁夏枸杞糖代谢的影响机制”(31660199)

Elevated CO2 Concentrations: Effects on Soil Microbial Quantity and Enzyme Activity in Root Zone of Lycium barbarum

Xie Yun(), Guo Fangyun, Cao Bing()   

  1. College of Agriculture, Ningxia University, Yinchuan 750021
  • Received:2020-04-07 Revised:2020-06-08 Online:2021-01-25 Published:2021-01-26
  • Contact: Cao Bing

摘要:

为探究大气CO2浓度倍增对宁夏枸杞根区土壤微环境的影响,以宁夏枸杞为试验材料,用开顶气室模拟控制CO2浓度测得在大气CO2浓度倍增处理下根区土壤微生物数量与土壤酶活性的变化。大气CO2浓度倍增处理降低真菌数量,增加细菌、放线菌数量。0.5倍增CO2浓度处理下宁夏枸杞根区土壤过氧化氢酶和转化酶的活性较对照分别提高24.74%和23.71%,脲酶活性和多酚氧化酶活性降低0.45%和15.29%;1倍增处理下土壤3种酶的活性较对照分别提高55.74%,23.07%,44.60%,而多酚氧化酶降低24.94%。通径分析表明,真菌数量对脲酶活性影响力最大,而细菌数量对过氧化氢酶活性影响力最强。大气CO2浓度倍增宁夏枸杞根区土壤微生物数量与酶活性的相关性增强,其中真菌数量和细菌数量与脲酶呈显著负相关,放线菌数量在0.5倍增处理下与脲酶呈显著负相关。大气CO2浓度倍增处理使宁夏枸杞根区土壤细菌、放线菌数量增加且可提高土壤过氧化氢酶、脲酶和转化酶的活性。

关键词: 大气CO2浓度, 宁夏枸杞, 土壤微生物, 土壤酶活性

Abstract:

To investigate the effect of atmospheric CO2 concentration on the soil microenvironment of wolfberry root area in Ningxia, Lycium barbarum L. was used as the test material, and the open-top air chamber was used to simulate the control of CO2 concentration to measure the changes in the number of soil microorganisms and soil enzyme activity in the root zone under the double treatment of atmospheric CO2 concentration. Elevated CO2 concentration reduced the number of fungi and increased the number of bacteria and actinomycetes. Under 0.5-fold increase CO2 concentration treatment, the activities of catalase and invertase in wolfberry root area were increased by 24.74% and 23.71%, the urease activity and polyphenol oxidase activity were decreased by 0.45% and 15.29% compared with those of the control. Under double CO2 concentration treatment, the activities of the three enzymes were increased by 55.74%, 23.07%, and 44.60%, while the polyphenol oxidase decreased by 24.94%. Path analysis showed that the number of fungi had the greatest influence on urease activity, while the number of bacteria had the strongest influence on catalase activity. Atmospheric CO2 concentration enhanced the correlation between the number of soil microorganisms and enzyme activity in the root zone, in which the number of fungi and bacteria was significantly and negatively correlated with urease, and the number of actinomycetes was significantly and negatively correlated with urease under 0.5-fold treatment. The elevated CO2 concentration could increase the number of soil bacteria and actinomycetes in the root zone of wolfberry and the activities of soil catalase, urease and invertase.

Key words: CO2 concentration, Lycium barbarum, soil microorganisms, soil enzyme

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