Effects of nitrogen nutrition on photosynthesis and fruit production in Japanese pear, apple and grape trees.

氮营养对日本梨、苹果和葡萄树光合作用和果实产量的影响。

• 批准号: 60480037
• 负责人: HIRATA Naomi
• 金额: $ 3.78万
• 依托单位: Chiba University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1985
• 资助国家: 日本
• 起止时间: 1985 至 1986
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-60480037/
• 关键词: Nitrogen nutrition; Photosynthesis; Nitrogen metabolism; Productivity; 果樹の生産性; 果実の品質

The effects of nitrogen nutrition during the growth season on net photosynthesis, photosynthate accumulation, nitrogen absorption, yield and fruit quality in Japanese pear, apple and grapes were investigated. In this studies, <^(15)N> and <^(13)C> were used as tracer elements.Photosynthetic activities in the shoot growth period were higher at high N levels than that both medium N levels and none N levels. While, in the fruit growth period, it were highest at medium N levels.Most of the nitrogen which had been applied on early April, were absorbed and translocated into fine roots and buds. The nitrogen applied on mid June were mainly translocated into leves and shoots. On the other hand, the nitrogen absorbed on early September were mainly transelocated into older shoots and roots.In the fruit growth and mature periods, the amount of <^(13)C> translocated into fruit increased at both medium N levels and none N levels, and decreased at high N levels.The <^(13)C> incorporated into fruit increased mainly in the sugar fruction at medium N levels and none N levels, but did not increased in both organic acid and amino acid fructions. In high N levels, more <^(13)C> was found in the organic acid and amino acid fructions than in the sugar fruction.

研究了生长季氮素营养对梨、苹果和葡萄净光合作用、光合产物积累、氮素吸收、产量和果实品质的影响。本研究以<^(15)N>和<^(13)C>为示踪元素。高氮水平下地上部生长期的光合活性均高于中氮水平和无氮水平。而在果实生长期，中氮水平最高。4月初施的氮大部分被吸收并转移到细根和芽中。 6月中旬施用的氮肥主要转移到地上部和地上部。另一方面，9月初吸收的氮主要转移到老梢和根部。在果实生长和成熟期，中氮和无氮水平下<^(13)C>转运到果实中的量均增加，高氮水平下则减少。中氮和无氮水平下果实吸收的<^(13)C>主要是糖分含量增加，而有机酸和氨基酸含量均不增加。 摩擦。在高氮水平下，在有机酸和氨基酸产物中发现了比在糖产物中更多的<^(13)C>。

项目成果

Naomi Hirata: "Studies on Photosynthesis and matter production in Japanese pear trees." The Technical Bulletin of Faculty of Horticulture Chiba University. 40. 1-10 (1987)

Naomi Hirata：“日本梨树光合作用和物质生产的研究。”

平田尚美: 千葉大学園芸学部学術報告. 40. 1-10 (1987)

平田直美：千叶大学园艺学部学术报告。40. 1-10 (1987)。