Effects of Temperature Conditions in a Green House on the Growth of ‘Muscat of Alexandria’ Grapes

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  • ブドウ‘マスカット•オブ•アレキサンドリア’の生育に及ぼすガラス室内温度条件の影響
  • ブドウ"マスカット・オブ・アレキサンドリア"の生育に及ぼすガラス室内温度条件の影響
  • ブドウ マスカット オブ アレキサンドリア ノ セイイク ニ オヨボス ガラス
  • Effects of Temperature Conditions in a Green House on the Growth of ^|^lsquo;Muscat of Alexandria^|^rsquo; Grapes

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Abstract

The purpose of this study to clarify the effect of night temperature on growth of bearing shoots and berries, and the number of days from budbreak to bloom of ‘Muscat of Alexandria’ (Vitis vinifera L.) grown in green houses and to find out the most suitable night temperature in order to save fuel oil.<br>1. Growth of bearing shoot was more closely related to mean temperature than to the temperature during a specific period of time. Growth of bearing shoot was closely correlated with heat summation above 2.9°C (the sum of the temperature subtracted 2.9°C from mean daily temperature).<br>2. The number of days from budbreak to full bloom was closely related to mean daily temperature. When heat summation above 2.7°C reached 661°C, flowers of cluster came into full bloom.<br>3. During growth period I, berry growth was promoted by higher night and mean daily temperatures. High temperature, however, did not affect the rate of berry growth during growth period II.<br>4. High temperatures did not always shorten the number of days from full bloom to veraison.<br>5. The percentage berry set showed a tendency to increase when the temperature from 0a.m. to 6a.m., or the mean temperature during blooming was low. There seemed to be no relationship between seed number per berry and temperature.<br>6. Althogh blooming under Low-Low treatment (low temperature treatments from 6p.m. to 12p.m. and from 0a.m. to 6a.m.) occured a few days later than that under Medium-Medium treatment, the amount of fuel oil consumed in Low-Low treatment was much less, and the retardation in blooming and berry growth was countered by proper vine management after blooming.

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