Spatial variation in tree root distribution and growth associated with minirhizotrons View Full Text


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Article Info

DATE

1992-06

AUTHORS

Ronald L. Hendrick, Kurt S. Pregitzer

ABSTRACT

Four minirhizotrons were installed in each of three replicate plots in a deciduous forest dominated by Acer saccharum Marsh. The length growth of tree roots along the surface of the minirhizotrons was measured for a period of one year, and the resulting data were analyzed in nested, averaged and pooled arrangements. The analyses of nested data showed that spatial variation in root growth and abundance among minirhizotrons within plots was greater than variation among plots. Averaging data from minirhizotrons within plots prior to analysis reduced variation about plot means, but extensive intraplot variation invalidates this approach on statistical grounds. Both nested and averaged data failed to account for the contribution of individual roots to the mean, and root production rates were consequently overestimated. Pooling the data from the four minirhizotrons reduced variation about the means, and resulted in a more representative estimate of root production rates. The analysis of composited data can be used to incorporate small-scale variation into a single replicate sample in those circumstances where the activity of the root systems of plant communities is the object of study. More... »

PAGES

283-288

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/bf00007884

DOI

http://dx.doi.org/10.1007/bf00007884

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1001602750


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