畦面被覆の微気象に関する研究 : III 被覆の資材・方法の相違が作物の生育に及ぼす影響 (その2)

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Continuing the previous work, the sweet potatoes were cultivated from July to November, 1972, at the experiment farm, Kagawa University, Japan. The sweet potato cultivations were made in following four plots, namely, the no mulch plot, the aluminum foil mulched plot, the black mulched plot and the day and the night mulched plot with the styrofoam plates. The observations were performed especially with the relation between the underground temperature and the sweet potato growth. The following results were obtained. The top weight of the sweet potato plants was maximum and the length of the sweet potato plants was longest at the black vinyl film mulched plot and these values decreased in the following order, the no mulch plot, the aluminum foil mulched plot and the day and the night mulched plot. This tendency is proportional to the maximum diurnal underground temperature. The tuberous root weight of the sweet potatoes was most heavy at the black vinyl film mulched plot and was most light at the day and the night mulched plot, namely, in comparison with the tuberous root weight of the no mulch plot, that of the aluminum foil mulched plot was about 1.5 times, the black vinyl film mulched plot was about 3.7 times and the day and the night mulched plot was about 0.6 times. These results suggest that the cultivation method of the sweet potatoes by the covering of the row with the black vinyl film is much useful.前報に引続き, 香川大学農学部附属農場において, 1972年7月から11月にかけて甘薯を栽培した. 即ち, 裸地畦区, アルミ箔被覆区, 黒色ビニールフィルム被覆区および断熱材を用いた全被覆区について行ない, とくに地温と甘薯の生育との関係について考察した. 得られたおもな結果は, 甘薯の地上部重・総茎長については, 黒色ビニールフィルム被覆区が最も大で, 次いで裸地畦区, アルミ箔被覆区, 全被覆区の順で日最高地温に比例していた. 塊根重は, 黒色ビニールフィルム被覆区に最も多く, 全被覆区が最も少なかった. これらを裸地畦区に比べると, アルミ箔被覆区は1.5倍, 黒色ビニールフィルム被覆区は3.7倍, 全被覆区では0.6倍であった. これらの結果は, 雑草の防除をも兼ねた黒色ビニールフィルム被覆の甘薯栽培に対する利用価値の高いことを実証したものである.
香川大学の論文
1977-03-30

畦面被覆の微気象に関する研究 : III 被覆の資材・方法の相違が作物の生育に及ぼす影響 (その2)

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