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An Experimental Study of a Simple Sampling Method for Determining the Optimal Timing for Gibberellin Application to Field-Grown ‘Delaware’ Grape from the Number of Leaves
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- Kamimori Masahiro
- Research Institute of Environment, Agriculture and Fisheries, Osaka Prefecture
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- Miwa Yuka
- Research Institute of Environment, Agriculture and Fisheries, Osaka Prefecture
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- Isobe Takeshi
- Research Institute of Environment, Agriculture and Fisheries, Osaka Prefecture
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- Hosomi Akihiro
- Research Institute of Environment, Agriculture and Fisheries, Osaka Prefecture Toyo Institute of Food Technology
Bibliographic Information
- Other Title
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- 露地栽培ブドウ‘デラウェア’における展葉数を指標とした ジベレリン処理適期把握のための簡便なサンプリング法の検討
Description
To develop a simple method to determine the optimal timing for the application of gibberellin （GA3） to fruit clusters of ‘Delaware’ grape in the field from the number of leaves using the shoot in the different positions （numbered from the tip of the bearing mother shoot）. Using ‘Delaware’ grape leafing data from 1987 to 2018, we analyzed the relationship between the shoot position on the bearing mother shoot and the average number of leaves per shoot on the day when the average number of leaves per shoot in all shoots reached 9.5, which is used as an indicator for the timing of GA3 application in Osaka Prefecture, Japan. The average number of leaves on the day based on the average number of total shoot leaves was the largest on the first shoot as counted from the tip of the bearing mother shoot and decreased gradually toward its base. In view of practical considerations, we analyzed the relationship between the numbers of samples of the first shoot and second shoot（ second shoot from the tip of the bearing mother shoot） and the error of estimation of the number of leaves. The results suggested that under the weather conditions in Osaka Prefecture, the optimal timing for GA3 application could be determined from sampling 8 first shoots as the day on which the average number of leaves exceeded 10.5, or from 8 second shoots as the day on which it exceeded 10.0.
Journal
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- New Kinki Chugoku Shikoku Agricultural Research
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New Kinki Chugoku Shikoku Agricultural Research 3 (0), 36-45, 2020
Western Region Agricultural Research Center, National Agricultural and Food Research Organization
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Details 詳細情報について
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- CRID
- 1390565134838351616
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- NII Article ID
- 130007814237
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- ISSN
- 2433796X
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- Text Lang
- ja
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- Data Source
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- JaLC
- CiNii Articles
- Crossref
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- Abstract License Flag
- Disallowed