Zyoohatumen no Atumari ni taisuru Kaze no Hataraki

1. In order to analyse the influence of wind on transpiration of plant community, some series of model experiments were carried out, using cylindrical filter papers for Soxhlet extraction apparatus as evaporating surfaces. 2. Evaporation from combined evaporating surface (Curve B in Fig. 2), or model community, was far less than the multiple of evaporation from an isolated one (line A in Fig. 2). But when they were exposed to artificial wind, the evaporation from the former (Curve C in Fig. 2) got near to that of the latter. 3. Evaporation from model community was much more increased by wind as compared with that from isolated ones (Table 1). 4. As for evaporation from an unit evaporating surface in the model community, evaporation from the evaporating surface set inside of the community was far less than evaporation from those set outside, but these tendency was disturbed by exposure to artificial wind and new tendency was observed, i. e., evaporation from evaporating surface set on windward was much more as compared with those set on leeward. 5. It is generally accepted that the increase of transpiration of plant by wind is chiefly due to the fact that mass of moist air on the leaf surface is removed by wind, and it is also accepted that the rate of increase of transpiration by wind is to some degrees affected by wind velocity. It may be possible that relations shown in the model communities are in some cases applicable to the case of natural communities. These relations must be considered when we apply to the cases of community the results of the experiments on the influence of wind on transpiration of isolated seedlings or cut shoots