Studies on the Frost Damage on the Tea Bush (Part 5):On the Influence of the Direct Covering on the Air and Leaf Temperature under the Covering
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概要
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1. To know the suitable method to prevent frost damage of the tea bush by thin straw mat covering, the warm keeping effect was compared between two methods, the one was putting the mat on the bush surface (direct covering), the other was holding the mat 60 cm. above apart from the bush (indirect covering).<BR>The former method have been said that it frequently could not prevent severe damage.<BR>2. The leaf temperature under the covering was both kept higher than that of open one, but the temperature of the leaf touched to the covering material was lower than that of the untouched. From these facts it was suggested that the cold mat influenced on the air and leaf temperature owing to its nearer situation, and the touched leaf was cooled by heat conduction to the colder covering.<BR>The air temperature under either covering method was kept warmer than in the open plot, and especially the air temperature under the indirect covering was warmest. The straw mat covering was more effective at a calm night than at a windy one.<BR>The difference of air temperature between direct covering and open plot was small, as the bush under the covering was influenced by the radiate cooling from the cooler covering material.<BR>3. In the test of 1959, the tea leaves of open and two kinds of covering plot were damaged severely, as the test field was exposed to the low air temperature (about -6.0°C.). But the growth of bud after the damage of indirect covering plot was more speedy than that of direct covering or open plot, and the difference of growing speed between the direct covering and the open plot was seen scarcely.
- 日本茶業技術協会の論文
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関連論文
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- 茶樹の花茅分化に関する研究(第1報) : 分化時期および分化習性について
- Studies on the Frost Damage on the Tea Plant (Part 4):On the Re-sprouting and Growth of Tea Bud after the Frost Damage and the Effect of Growth Promoting Treatment to the Re-growing Bud
- Studies on the Frost Damage on the Tea Bush (Part 6):On the Height of Covering for the Warm Keeping
- Studies on Flower Bud Differentiation in the Tea Plant (Part 3):The Influence of Temperature
- Studies on the Frost Damage on the Tea Plant (Part 3):On the Prevention of Frost Damage by the Wind Blast
- The Effect of Vinyl Cover on the Tea Plant
- Investigation on the Decayed Tea Garden Soil (Part 2):On the Soil of the Tea Producing Country along the Upper Stream of the ÔI
- The Soil Erosion on the Tea Garden in Shizuoka Prefecture
- Soil Survey on the Tea Garden of Goka-mura, Haibara-gun, Shizuoka-prefecture
- Studies on the Frost Damage on the Tea Bush (Part 5):On the Influence of the Direct Covering on the Air and Leaf Temperature under the Covering
- Soil Survey on the Tea Garden of Saigô-mura, Ogasa-gun, Shizuoka-prefecture