Effects of the Environmental Factors upon the Differentiation and Development of Fruit Buds of the Peach Trees

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概要

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• 1. The development of peach fruit buds collected simultaneously from twenty different regions in Japan was classified into three groups according to the climatic conditions, in spite of the differences of tree age and methods of cultivation. It was related with the mean temperature in June, July, and August in 1957. It was also known that about 900 degrees C of heat summations above 10 degrees C from the time of sprouting in April to the time of fruit bud differentiation in the peach in various regions was required. 2. As the results of temperature treatments, high day and night temperatures markedly prevented the fruit bud formation, and also high night temperature reduced the number of fruit buds. 3. The time of differentiation of fruit bud in the peach does not definitely respond to light duration, but, under short photoperiods the number of fruit buds was considerably reduced. The shading of the peach trees greatly reduced the fruit bud formation, and with the severe shading the peach tree finally died. It indicated that in the interior of dense, unpruned trees, the flower formation may be greatly prevented by the low intensity of light. 4. The differentiation and development of fruit buds were stimulated under dry conditions of the soil at the early stage of growth, and they were greatly reduced, if the soil conditions were either extremely dry or wet throughout the growing season. 5. The excessive application of inorganic nitrogen fertilizer to young peach trees definitely delayed the differentiation and formation of fruit bud, while the application of phosphorus fertilizer considerably increased fruit bud formation. 6. The complete defoliation at the early stages of growing season entirely prevented the formation of fruit bud. Some buds were destroyed, and others were stimulated to sprout the secondary shoot. The similar effects, though less severe, were found also in plots where three-fourths leaves were removed.

• 大阪府立大学の論文
• 1961-03-31

著者

• Hirata Naomi

  Laboratory Of Pomology College Of Agriculture

• HIRAI Juzo

  Laboratory of Pomology, College of Agriculture

• NAKAGAWA Shoichi

  Laboratory of Pomology, College of Agriculture

• NANJO Yoshimasa

  Laboratory of Pomology, College of Agriculture

• Hirai Juzo

  Laboratory Of Pomology College Of Agriculture

• Nanjo Yoshimasa

  Laboratory Of Pomology College Of Agriculture

• Nakagawa Shoichi

  Laboratory Of Pomology College Of Agriculture

• Hirai J.

  Laboratory of Pomology, College of Agriculture

関連論文

• Effects of the Environmental Factors upon the Differentiation and Development of Fruit Buds of the Peach Trees

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