Potの土壌温度調節に関する研究 : II Wagner potを用いた冬期における実験観測例

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Micrometeorological study was carried out for Wagner pots of four different conditions, i. e., the outer surface of the pot was coated with a black lacquer, covered with aluminum evaporated film, covered with soil by buryng the pot in the ground and remained uncovered. In this paper the results obtained on a clear day (Dec. 27, 1974) are discussed. The daily variation of the theoretical direct solar radiation was varied every direction of the pot wall. Especially, the variation in daily amounts of the theoretical direct solar radiation at each direction was remarkable as compared with that in early autumn. The amount at the S-wall of the pots was 2.08 times as much as that on flat land. The feature of the distribution of soil temperature in each pot was substantially similar to that obtained in the previous experiments (observations) which were done in early autumn. In the present study, however, the soil in the three pots placed on the ground was partially frozen up in the early morning, mainly by low air temperature and no window. In the forenoon, the soil near the S-wall melted out more rapidly, compared with that near the E-wall. The range of daily quantity of the soil was greatest in the black lacqured pot and the range value was was 2.97 times as much as that in the uncovered control pot.Wagner pot(1/2000 a) 壁面のAlbedoを調節し, またPotを埋設処理し, 無処理のPotを対照区として, Pot壁面での日射量の分布, Pot内土壌温度分布特性等について1975年12月27日に比較実験を行ない, 冬季におけるPot栽培の地下環境について調べた. その結果次のことが得られた. Pot壁面での直達理論日射量の各方位における日変化は, それぞれの方位に特有なものであった. 特に日総量では, Pot壁面各方位間の差は冬季には大きく, 南面は平地の2.08倍であった. 各Pot内土壌温度分布特性は, 初秋の場合とほぼ同じ傾向であったが, 地上設置Pot内土壌の昇温は, 午前中土壌凍結のため, 南面側が東面側に比して著しかった. Pot内中央部での地中熱交換量の日較差は, 黒塗区が最高となり, 無処理区の2.97倍であった.
香川大学の論文
1978-09-30

Potの土壌温度調節に関する研究 : II Wagner potを用いた冬期における実験観測例

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