学会誌「自然災害科学」

自然災害科学49 Vol.18,No.1, 1999, p71f

【論文】[Regular Paper]

桜島南岳からの降灰による作物生育被害に関する研究
(2) 桜島からの現地情報に基づく考察

Studies on Crop Growth Damage due to Ash Fall from Mt. Minamidake of Sakurajima
(2) Some Considerations Based on Statistic and Crop Scientific Informations from Sakurajima Island

角 明夫*・鈴木 義則**

Akio SUMI* and Yoshinori SUZUKI**

Abstract

It was found from time trend of crop yields at Sakurajima-Town and geographical distribution of increased percentage of crop yield in Kagoshima Prefecture that the crop production in and around Sakurajima has been severely affected by the ash fall.
Between the stomatal conductance and the distance from a volcanic crater, a clear relationship could not be found. But, when the volcanic ash accumulated on leaf surface, a considerable rise in leaf temperature was observed, and then numerous fruit drops happened in mandarin orange. Some advantages of the simplified soil admixing, in which normal soil is arranged concentrically around the main root of a crop, were reconfirmed in on-the-spot examination. From these statistic and crop scientific informations from Sakurajima Island, the occurrence mechanisms of crop growth damage due to ash fall and some cultural countermeasures were discussed.

キーワード:

簡易型土壌改良，光合成，降灰被害，遮光，無限伸育型作物，葉温上昇，落果

Key words:

simple soil dressing, photosynthesis, damage due to ash fall, shading, indeterminate crop, rise in leaf temperature, fruit drop
*
鹿児島大学農学部生物生産学科
Department of Agricultural Science, Faculty of Agriculture, Kagoshima University
**
九州大学農学部農業工学科
Department of Agricultural Engineering, Faculty of Agriculture, Kyushu University