Elucidation of mechanism of mast seeding: assessment of nitrogen cycle in soil-plant systems in mature Fagus crenata forest

肥大播种机制的阐明：成熟水青冈林土壤-植物系统氮循环的评估

• 批准号: 21380103
• 负责人: HAN Qingmin
• 金额: $ 9.82万
• 依托单位: Forestry and Forest Products Research Institute
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2009
• 资助国家: 日本
• 起止时间: 2009 至 2012
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-21380103/
• 关键词: 至近要因; 窒素; 非構造性炭水化物; 貯蔵資源量; 年収支; マスティング; 生態・生物多様性; 豊凶作; 窒素動態; 貯蔵機能; リタ-分解; リター分解

In order to elucidate the mechanism of mast seeding, contribution of internal resource storage and current-year gained resource to seed production were assessed in mature Fagus forests. The main findings are (1) seeds are produced from current-year photoassimilates, but independent on internal stored non-structural carbohydrate (NSC), (2) nitrogen (N) in leaves and branchlets served as storage organ for seed production, (3) current-year uptake of N from soil contributed greatly to seed production, (4) although internal storage of both N and NSC decreased after a full mast event, the storage pool was always two-fold higher than its respective values measured from reproductive litters. These results suggest that the level of annual internal resource store may not be the trigger of flowering in mast seeding species.

为了阐明肥大播种的机制，在成熟的水青冈林中评估了内部资源储存和当年获得的资源对种子生产的贡献。主要发现是（1）种子是由当年的光同化物产生的，但独立于内部储存的非结构碳水化合物（NSC），（2）叶子和小枝中的氮（N）作为种子生产的储存器官，（3 ）当年从土壤中吸收的氮对种子生产有很大贡献，（4）尽管氮和 NSC 的内部储存在肥大事件后减少，但储存库始终比从繁殖窝中测量的相应值高两倍。这些结果表明，年度内部资源储存水平可能不是肥大播种物种开花的触发因素。

项目成果

Masting affected intra- and inter- annual variations in stored nitrogen reserves in Fagus crenata trees?

桅杆对水青冈树储存氮储量的年内和年际变化有何影响？

• 发表时间: 2012
• 作者: Han Q; Kabeya D; Iio A;Kakubari Y
• 通讯作者: Kakubari Y

Effects of long term CO_2 enrichment on the competition between reproduction and vegetative growth in mature Fagus sylvatica trees

长期CO_2富集对成熟水青冈树繁殖与营养生长竞争的影响

• 发表时间: 2010
• 作者: Q Han; D Kabeya;G Hoch
• 通讯作者: G Hoch

ブナの堅果形成に伴う炭素・窒素収支

与山毛榉坚果形成相关的碳和氮平衡

• 发表时间: 2012
• 作者: 古川翔子・水永博己・楢本正明・五島文子・藤島みずき

Is reproductive event in Fagus crenata associated with the amount of individual level carbohydrate storage?

水青冈的繁殖事件与个体水平碳水化合物储存量相关吗？

• 发表时间: 2012
• 作者: Kabeya D; Inagaki Y; Chiba Y; Naramoto M;Han Q
• 通讯作者: Han Q

窒素および炭水化物の貯蔵機能の評価に基づくブナ林堅果豊凶作のメカニズムの解明

基于氮和碳水化合物储存功能评价阐明山毛榉林坚果产量和作物歉收的机制

• 发表时间: 2009
• 作者: 韓 慶民