@article{oai:ir.kagoshima-u.ac.jp:00000822,
 author = {籾井, 和朗 and 坂口, 朋軌 and 下田代, 智英 and 肥山, 浩樹 and 竹内, 真一},
 journal = {鹿兒島大學農學部學術報告=Bulletin of the Faculty of Agriculture, Kagoshima University},
 month = {2016-10-27},
 note = {茎熱収支法によるダイズの茎内流量測定に関して, 茎表面の温度差に基づく従来法は, 低い流量では秤量法に近い値を示すが, 日中の100gh^{-1}以上の蒸散量では過大評価する傾向がみられた｡茎内部の温度差に基づく補正法による茎内流量は, 茎内流による対流熱量が, 放射方向への損失熱量より卓越する場合には, 秤量法による蒸散量の時間変化と良く一致した｡時間単位の蒸散量に関しては, 従来法と補正法を組み合わせた方法と秤量法との残差の標準偏差は7gh^{-1}, および両者の量の相関係数は0.992であった｡日蒸散量に関しては, 茎表面温度差を用いた従来の茎熱収支法では日蒸散量を約20％過大評価するが, 組み合わせ法と秤量法との差はわずかに3％であり両者には良い一致がみられた｡, The conventional stem heat balance (SHB) method based on the stem-surface temperature measurements correctly estimated the transpiration rate of soybean crops in a plastic pot measured using an electronic balance in cases of a sap flow rate less than 100gh-1. However the transpiration rate over 100gh-1 was overestimated using the conventional SHB method. The corrected SHB method by the stem-inside temperatures instead of the stem-surface temperatures was applied when the convective heat, Qf, by sap flow is greater than the conductive heat loss, Qr, in the radial direction. The estimated sap flow rate using the corrected SHB method agrees well with the transpiration rate over 100gh-1 obtained from the gravimetric measurements using the electronic balance. Thus, in this study, the combined SHB method, in which the conventional SHB method for Qf＜Qr and the corrected SHB method for Qf≧Qr are applied, was examined to measure the sap flow rate of the soybean crops. The root mean square difference between the hourly transpiration rate using the combined SHB method and the gravimetric method was 7gh-1 and the correlation coefficient was 0.992. In the experiment investigating the daily transpiration
rate of the soybean crop, the difference between the combined SHB method and the gravimetric method was within 3%, while the conventional SHB method overestimated by 20%.},
 pages = {51--57},
 title = {茎熱収支法による茎内流量測定に関する研究 : ダイズへの適用},
 volume = {62},
 year = {}
}