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Jpn.J.For.Environment42i1jC29-35@2000

 

 

Methodological studies of Cryptomeria japonica D. Don root sampling and

measurement techniques for simultaneous analysis of root and arbuscular

mycorrhiza dynamics

 

Takeo Mizoguchi–

Forestry and Forest Products Research Institute, Inashiki, Ibaraki 305, Japan.–

 

 @In order to modify of regular root sampling and sorting techniques for simultaneous analysis of root and arbuscular mycorrhiza dynamics, three kinds of root sampling were conducted in several Japanese cedar (Cryptomeria japonica D. Don) stands from 1988 to l992. The results of root mass analysis indicated that, compared to other tree species, great sampling variation in Japanese cedar posed the most serious problem to detecting subtle fluctuations in active root tips that are capable of forming mycorrhiza. In place of direct root mass comparison, several indices calculated from root parameters (e.g., number of living root tips per gram of living fine roots) can be applied to reduce the influence of sample variation.


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