Evaluation of belowground seasonal dynamics of Typha angustifolia after cutting treatment

概要

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Typha angustifolia, an emergent macrophyte, shows different growth characteristics under the influence of external forces. In this study, the growth characteristics of T, angustifolia were investigated after cutting the shoots (treatment area: 3m×4m). The treatment is considered as an external force. Two stands, one in a sterile zone and the other in a fertile zone, were cut at the end of June 2001 and the subsequent re-growth characteristics were observed. The difference of response, after cutting their shoots in the fertile zone and sterile zone was prominent. Shoot re-growth model was developed to evaluate the belowground dynamics by calibrating the choot height and aboveground parameters. The belowground biomass of cut area after one year was simulated to be about 80% of that of uncut area. The results were verified using the belowground biomass observed in April 2002. The buds in the cut area are shorter than those of the uncut area. Morever, the cut area in the ferile zone generated thinner buds than that of the sterile zone. The belowground biomass and re-growth strategy after cutting were supposed to cause the differences of their buds the year after.
信州大学の論文
2004-02-28