Effect of Air Oscillation on Evapotranspiration from a Tomato Seedling in the Closed Box

概要

論文の詳細を見る
Air with oscillation may move through a plant canopy easily. In order to study this air movement and its effect on evapotranspiration, the air movement in a closed box and its effect on evapotranspiration from a tomato seedling was investigated, as a first step. Air oscillations of 0, 5, 15, and 24Hz were examined. The air velocity and the resulting evapotranspiration from the tomato seedlings inside the box were highest at 15Hz oscillations. The evapotranspiration rate was correlated to the resulting air velocity, but not to the oscillation frequency. At oscillation frequencies of 5, 15, and 24Hz, the transpiration resistance (water vapor diffusion resistance from a tomato seedling to the air) was proportional to the inverse of the square root of the air velocity. Evaporation resistances from the rooting medium exposed to air oscillations were 1.5-2 times greater compared to the resistances from the same rooting medium exposed to fan-generated air movement at the same velocity. The transpiration resistance from the tomato seedlings was the same whether the seedlings were exposed to air oscillations or fan-generated air movement at the same velocity.
農業施設学会の論文