Skip to Main Content
Arbuscular mycorrhizal inoculation has similar benefits to fertilization for Thuja occidentalis L. seedling nutrition and growth on peat soil over a range of pH: implications for restorationAuthor(s): Guswarni Anwar; Erik A. Lilleskov; Rodney A. Chimner
Source: New Forests
Publication Series: Scientific Journal (JRNL)
Station: Northern Research Station
Download Publication (789.0 KB)
DescriptionArbuscular mycorrhizal (AM) fungi are hypothesized to assist growth of northern whitecedar in acid peatlands, yet there is little direct evidence that they can provide sufficient resources, especially nitrogen (N), from unfertilized peat soils. Our objective was to determine mycorrhizal efficacy to support cedar growth and nutrient supply as part of a low-impact approach for ecological restoration of cedar in peatlands. We tested the effectiveness of AM inoculation in a greenhouse experiment in factorial combination with fertilization and liming. We also determined AM colonization rate in the different treatment combinations. We found that AM inoculation in the absence of fertilization significantly increased all growth parameters, phosphorus (P) concentrations, and N, P, and copper (Cu) content of the seedlings, and decreased N:P ratios. Fertilizer alone had a similar impact on plant growth and nutrient acquisition when compared to un-fertilized AM inoculation treatments. Liming alone was ineffective at increasing cedar growth and nutrient uptake. There were many interactions of AM inoculation with liming and fertilization. Specifically, the positive effect of AM inoculation on many growth and nutrition metrics was strongly reduced in the presence of fertilization, whereas the P benefit of mycorrhizas appeared to increase under liming. We conclude that addition of AM inoculation alone improved cedar growth and P acquisition, reducing the need for fertilizer and lime in peatlands. However, seedling N limitation might be a problem in strongly N-deficient peat soils.
- Check the Northern Research Station web site to request a printed copy of this publication.
- Our on-line publications are scanned and captured using Adobe Acrobat.
- During the capture process some typographical errors may occur.
- Please contact Sharon Hobrla, email@example.com if you notice any errors which make this publication unusable.
CitationAnwar, Guswarni; Lilleskov, Erik A.; Chimner, Rodney A. 2019. Arbuscular mycorrhizal inoculation has similar benefits to fertilization for Thuja occidentalis L. seedling nutrition and growth on peat soil over a range of pH: implications for restoration. New Forests. 51: 297-311. https://doi.org/10.1007/s11056-019-09732-x.
KeywordsNorthern white-cedar, Growth rate, Mycorrhizal effect on nitrogen:phosphorus ratio, Stoichiometry, Liming
- Silvicultural guide for northern white-cedar (eastern white cedar)
- Natural disturbance and stand structure of old-growth northern white-cedar (Thuja occidentalis) forests, northern Maine, USA
- The Northern White-Cedar Recruitment Bottleneck: Understanding the Effects of Substrate, Competition, and Deer Browsing
XML: View XML