Effect of the Ash Fall on Leaves and Soil by Sakurajima Volcano on Cultivating Crops Growth

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  • 葉や土壌に付着した桜島の降灰が栽培作物の生育に及ぼす影響
  • ハ ヤ ドジョウ ニ フチャク シタ サクラジマ ノ コウカイ ガ サイバイ サクモツ ノ セイイク ニ オヨボス エイキョウ

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Abstract

Sakurajima is the volcano in the gulf of Kagoshima, and is increase erupting times and ash falls, recently. Ash falls affects agricultural production of Sakurajima farmers. Therefore we tried to make clear the mechanisms of fallen ash to typical 5 vegetables in Sakurajima, soy (Glycin max Merr.cv.Fukunomame), maize (Zea mays L. cv. luncher 82), egg plant (Solanum melngena L.cv. Kokuyou), bell pepper (Capsicum annuum L.cv. Kyousuzu), and tomato (Solanum lycopersicum L. cv. Red ole). We cultivated them in the glass house at Kagoshima University Experimental Farm. As ash treatments, we dredged plant + soil(PS) or soil(S) with ash. As a result, there were no differences of plant lengths or main stem length between control and treatments after treatment started. In PS treatment, leaves surface were observed by a microscope. Some stellate hairs of egg plant and tricomes of tomato were observed and they prevented ash on the surface of leaves from being blown away by wind. It was estimated that some stellate hairs and tricomes would keep ash on the surface of leaves, and ash might inhibit the evaporation of stomata, then photosynthetic rate would decrease and plant growth and production might decrease.

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