The effect of timing of nitrogen topdressing to the grain protein content of wheat

施氮时机对小麦籽粒蛋白质含量的影响

• 批准号: 22780015
• 负责人: SHIMAZAKI Yumi
• 金额: $ 2.5万
• 依托单位: National Agriculture and Food Research Organization
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2010
• 资助国家: 日本
• 起止时间: 2010-04-01 至 2014-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-22780015/
• 关键词: コムギ; 子実タンパク質含有率; 追肥; パン用コムギ; 開花期追肥

The mechanism by which nitrogen topdressing after anthesis increases the grain protein content of wheat is unknown. We hypothesized that the route of translocation of adsorbed nitrogen to the grain changes from via the leaf to direct to the grain in response to an increase in the grain's capacity as a nitrogen sink. We tested this hypothesis by changing the timing of topdressing of nitrogen from the jointing stage to the ripening period. With topdressing after anthesis, grain protein content was significantly greater than with no topdressing, because nitrogen accumulation in the spikes was greater than the dry matter accumulation at this stage. The rate of translocation of absorbed nitrogen to assimilation organs such as the leaves decreased, and the rate of translocation to the spikes increased, as the time of nitrogen topdressing became later. Nevertheless, at least 40% of the nitrogen absorbed by the wheat plants in the mid-ripening period was immediately translocated to the leaves.

小麦花后追肥提高籽粒蛋白质含量的机制尚不清楚。我们假设，由于籽粒作为氮汇的能力增加，吸附氮转运到籽粒的途径从通过叶片转变为直接转运到籽粒。我们通过将拔节期的追肥时间改为成熟期来验证这一假设。开花后追肥籽粒蛋白质含量显著高于不追肥，这是由于此阶段穗部氮素积累量大于干物质积累量。随着追肥时间的延长，氮素向叶片等同化器官转运的速率降低，向穗部转运的速率增加。然而，小麦植株在成熟中期吸收的氮中至少有40%被立即转移到叶片上。

项目成果

Effects of Nitrogen Topdressing Timing on Yield and Grain Protein Content of ‘Yumeshihou’ Wheat

追施氮肥时机对小麦产量和籽粒蛋白质含量的影响

• DOI: 10.1626/jcs.83.25
• 发表时间: 2014
• 期刊: Japanese Journal of Crop Science
• 作者: 島崎由美;渡邊好昭;松山宏美;平沢正
• 通讯作者: 平沢正

窒素追肥の時期がコムギ品種 「ユメシホウ」 の収量および子実タンパク質含有率に及ぼす影響

氮肥施用时机对“梦食猴”小麦产量及籽粒蛋白质含量的影响

• 发表时间: 2014
• 期刊: 日本作物学会紀事
• 作者: 島崎由美;渡邊好昭;松山宏美;平沢正
• 通讯作者: 平沢正

開花期の前と後に追肥した15Nのコムギ体内での分布

花期前后施肥小麦体内15N的分布

• 发表时间: 2013
• 作者: 島崎由美;渡邊好昭;福田文夫・大筋はるか・藤井雄一郎・平野 健・森永邦久・久保田尚浩;福田文夫・米田愛理・木村優子・平野 健・森永邦久・久保田尚浩;島崎由美
• 通讯作者: 島崎由美

Grain Protein Concentration of Wheat (T. aestivum L.)-Can cultivation techniques control the grain protein concentration of wheat?

小麦 (T. aestivum L.) 的籽粒蛋白浓度 - 栽培技术能否控制小麦的籽粒蛋白浓度？

• DOI: 10.1626/jcs.79.407
• 发表时间: 2010
• 期刊: Japanese Journal of Crop Science
• 作者: 島崎由美;渡邊好昭
• 通讯作者: 渡邊好昭

開花期追肥がコムギ品種ユメシホウの子実タンパク質含有率に及ぼす影響

开花期追肥对小麦品种籽粒蛋白质含量的影响

• 发表时间: 2010
• 作者: Fumio Fukuda;Ken Hirano;Kunihisa Morinaga;and Naohiro Kubota;福田文夫・山田正隼・久保田尚浩;島崎由美
• 通讯作者: 島崎由美