Studies on the regulation of the underground temperature in the pot. I. Results of the Wagner pot experiment and its observation in early autumn

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  • Potの土壌温度調節に関する研究 Ⅰ. Wagner potを用いた初秋における実験観測例
  • Potの土壌温度調節に関する研究-1-Wagner potを用いた初秋における実験観測例
  • Pot ノ ドジョウ オンド チョウセツ ニカンスルケンキュウ 1 Wagne

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Abstract

Wagner pot has been used in the cultivation experiments of crops, vegetables and other plants. In these experiments, however, the environment condition of the root especially the underground temperature is different from one in the arable land. Three plots were made, namely the no treatment pot, the black lacquir coated pot and the aluminum evaporated film coverd pot. One set of the pots of these experimental plots was put on the ground and the other was buried in the ground remaing about 2 cm from the top. In this work, the distribution of solar radiation at the outer surface of the pot was calculated and the determination of the distribution of the underground temperature in each pot; its daily variation and daily amounts were characteristic in each direction. The characteristic tendency of the distribution of the underground temperature in the each pot was mainly obtained in the daily variation, the horizontal and the vertical distribution of the underground temperature, also the characteristic differences of the effects by the treatment of the outer surface of the pot were obtained in each direction of the underground in each pot. The characteristic tendency of the distribution of the underground temperature in aluminum evaporated film coverd pot was the most approximate to that of the arable land in the pots which were set on the ground, and then the effects of aluminum evaporated film covering were gained. The amplitude of daily heat quantity variation of the underground in the pot of each plot was the greatest in the black lacquir coated pot.

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