We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
凋落物和根系去除对滨海沙地土壤微生物 群落组成和功能的影响.
- Authors
桑昌鹏; 万晓华; 余再鹏; 王民煌; 林宇; 黄志群
- Abstract
: We conducted detritus input and removal treatment (DIRT) to examine the effects of shifting above- and belowground carbon (C) inputs on soil microbial biomass ' community composition and function in subtropical P'reus elUottU ' £uca/yptus uropAy//a X £uca/yptus graredis ' Acad'a au/acocarpa and Casuarina equisetifolia coastal sandy plain forests ' and the treatments included : root trenching, litter removal and control. Up to September 2015, one year after the experiment began , we collected the 0 - 1 0 cm soil samples from each plot. Phospholipid fatty acid (PLFA) analysis was used to characterize the microbial community composition ' and micro-hole enzymatic detection technology was utilized to determine the activity of six kinds of soil enzymes. Results showed that changes in microbial biomass induced by the C input manipulations differed among tree species ' and mainly affected by litter and root qualily. In uropAylla X grandis stands ' root trenching significantly decreased the contents ol total PLFAs, Gram-positive bacteria, Gram - negative bacteria, lungi and actinomycetes by 31%, 30%, 32%, 36% and 26%, respectively. Litter removal reduced the contents ol Gram-positive bacteria, lungi and actinomycetes by 24%, 27% and 24%, respectively. However, C input manipulations had no significant effect on soil microbial biomass under other three plantations. According to the effect ol C input manipulations on soil microbial community structure, litter and root exclusion decreased lungi abundance and increased actinomycetes abundance. Dillerent treatments under dillerent plantations resulted in various soil enzyme activities. Litter removal signilicantly decreased the activities ol cellobiohydrolase, (3-glucosidase, acid phosphatase and N-acetyl-β-d-glucosaminidase ol P. elliottii, A. aulacocarpa and C. equisetifo-Ha, root exclusion only decreased and increased the activities ol (3-glucosidase in P. elliottii and A. aulacocarpa lorest soils, respectively. Litter removal also decreased the activities ol polyphenol oxidase (PPO) and peroxidase (PER) in P. elliottii and C. equisetifolia lorest soils, while root trenching had no significant ellect on the activities ol PPO and PER under all plantations. The properties ol litter and root were the important lactors in determining the soil microbial community and enzyme activity, and the change ol soil microenvironment, such as temperature and moisture, caused by C input manipulations was also the important driver lor the change ol soil microbial property.
- Publication
Yingyong Shengtai Xuebao, 2017, Vol 28, Issue 4, p1184
- ISSN
1001-9332
- Publication type
Article
- DOI
10.13287/j.1001-9332.201704.011