摘要
以云南建水岩溶与非岩溶地区针叶林云南松、阔叶林桉树的根际土壤为样品,比较不同地质背景条件下不同林分岩溶与非岩溶地区可培养土壤微生物及其分泌的碳酸酐酶对碳酸盐岩溶蚀作用的影响.结果显示,岩溶地区的溶蚀速率均高于非岩溶地区,针叶林的溶蚀速率大于阔叶林,且岩溶地区云南松的溶蚀率最高为5.01%,说明岩溶地区云南松的土壤根际微生物对岩溶地区的溶蚀效应最大;加入碳酸酐酶抑制剂的处理组溶蚀速率较未加入碳酸酐酶的处理低3.6%-16%,表明碳酸酐酶对碳酸盐岩的溶蚀具有促进作用.本研究表明岩溶地区针叶林根际土壤微生物有利于碳酸盐岩的溶蚀,加快成土速率,结果可为深入研究自然生态系统中微生物对碳循环的驱动作用以及微生物对喀斯特地区的风化作用提供理论依据.
To understand the effects of different culturable microbial communities of soils on the dissolution of calcium carbonate rocks under different geological conditions, soil samples were collected from the rhizosphere of coniferous Pinus yunnanensis forests and broadleaf Eucalyptus sp. forests growing in the karst and non-karst areas of Jianshui, Yunnan. The impact of soil microbes in the karst and non-karst areas and the effect of the carbonic anhydrase secreted by them on the process of formation of the karst topography were explored. The results revealed that the rate of dissolution of calcium carbonate in the karst areas was higher than that of the non-karst areas, and the rate of dissolution of calcium carbonate in the coniferous forests was greater than that of the broadleaf forests. The rate of dissolution of calcium carbonate was highest in the P. yunnanensis forest, being nearly 5.01%, indicating that the corrosive effect of the microorganisms growing in the rhizosphere of P. yunnanensis in the karst areas was the highest. The dissolution rate of calcium carbonate in the treatment group, to which carbonic anhydrase inhibitors were added, was 3.6%-16% lower than the group to which carbonic anhydrase was not added, suggesting that carbonic anhydrase accelerated the dissolution of calcium carbonate from the rocks. Thus, the microbes thriving in the rhizosphere of coniferous forests in the karst areas enhanced the dissolution of calcium carbonate rocks and accelerated the formation of soil, which provides a theoretical basis for further research studies exploring the driving function of microorganisms in carbon cycling in natural ecosystems and the weathering of karst areas.
作者
范周周
卢舒瑜
李志茹
庞丹波
周金星
肖桂英
彭霞薇
FAN Zhouzhou;LU Shuyu;LI Zhiru;PANG Danbo;ZHOU Jinxing;XIAO Guiying;PENG Xiawei(College of Biological Sciences and Biotechnology,Beijing Forestry University,Beijing 100083,China;Key Laboratory of Soil and Water Conservation of State Forestry Administration,School of Soil and Water Conservation,Beijing Forestry University,Beijing 100083,China;Forest Technology Extension Institute of Jianshui County,Jianshui 654300,China)
出处
《应用与环境生物学报》
CAS
CSCD
北大核心
2018年第4期751-757,共7页
Chinese Journal of Applied and Environmental Biology
基金
国家重点研发计划项目(2016YFC0502500,2016YFC0502504)
国家自然科学基金项目(31500583)
中央级公益性科研院所基本科研业务费专项基金(CAFYBB2014ZD006,CAFYBB2016QB020)资助~~
关键词
碳酸酐酶
土壤微生物
岩溶
溶蚀
碳循环
carbonic anhydrase
soil microorganism
karst
dissolution
carbon cycle
