日本の圃場条件下における葉気温較差を用いた陸稲のかんばつ回避性の評価

日本作物学会紀事

福岡 峰彦¹  実山 豊¹  岩間 和人¹ 

[1] 北海道大学大学院農学研究科

关键词: Canopy surface temperature;    群落表面温度;    Deep-rooted;    深根性;    Drought avoidance;    乾燥回避性;    Drought resistance;    耐乾性;    Infrared thermometry;    赤外放射測温;    Thermal image;    熱画像;    Thermography;    サーモグラフィー;   

DOI  :  10.1626/jcs.75.57

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

The difference (ΔT) between canopy temperature (Tc) and air temperature (Ta) was examined for its validity as a criterion for drought avoidance in upland rice under field conditions in Japan, where vapor pressure deficit is low. The varieties which were assumed to differ greatly in drought avoidance mainly because of the difference in root depth, were grown in fully irrigated field plots (FIFP) and non-irrigated field plots (NIFP) in 2001, and in NIFP in 2002, under a rain shelter. On six dates during one month until heading in each year, Tc, Ta and stomatal conductance (gs) were measured nearly simultaneously using infrared thermography, thermometer and porometer, respectively. Root depth was measured at the harvest in 2002. In 2001, the rank order of ΔT averaged for all the dates (the cooler the higher) corresponded to that of gs (the higher the higher) among varieties within the same irrigation scheme. However, the rank order of ΔT and gs in FIFP did not correspond to that in NIFP which represents the degree of drought avoidance. In 2002, ΔT on each of the dates and the average for all the dates differed significantly among varieties. The deeper the roots, the higher the gs and the lower the ΔT. These results indicate that ΔT in NIFP can be utilized as a criterion for drought avoidance in upland rice under field conditions in Japan.

【 授权许可】

Unknown