Spatiotemporal dynamics of the clone of white clover in a grazed sward

放牧草地中白三叶草克隆的时空动态

• 批准号: 08660329
• 负责人: SAWADA Hitoshi
• 金额: $ 1.47万
• 依托单位: Shizuoka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1996
• 资助国家: 日本
• 起止时间: 1996 至 1997
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08660329/
• 关键词: White clover; Grazed sward; Spatiotemporal dynamics; Clonal plant; Clonal growth; Clonal reproductive ecology; Defoliation stress; Clone identification

Spatiotemporal dynamics of a single clone of white clover was examined in a grazed sward. Firstly, new techniques were developrd to measure and describe the clonal growth of white clover. Using the techiques, clonal growth of the target clone was monitored for two years in a perennial ryegrass-white clover sward. Following results were obtained : (1) The clone spreaded widely in summer to late-autumn but decreased its size in winter to early-summer. This depression was due to the thawing-frosting cycle. (2) Fragmentation of the clone occurred in winter to early-spring. Modules with roots and branches were likely to be sites for the separation. (3) Crush phenomenon was observed. (4) Branching strategy was found out. (5) The extent and pattern of defoliation by cattle were assessed. Number of healthy leaves which were not eaten was small. They placed near around the apex of stolons. (6) In an intensively grazed sward, defoliation stress to white clover clones was uniformly severe.(7) Defoliation stress gives them heavy damage and promotes the changes in size, resulting in high mortality risk.

在放牧的草皮中检查了一个白色三叶草的单个克隆的时空动力学。首先，开发了新技术，以测量和描述白三叶草的克隆生长。使用Techiques，在多年生的黑麦草 - 白三叶草草间中监测目标克隆的克隆生长两年。获得了以下结果：（1）克隆在夏季至后期广泛传播，但在冬季降低到早夏。这种抑郁症是由于解冻的周期。 （2）克隆的破碎发生在冬季到早期。具有根和分支的模块可能是分离的位置。 （3）观察到挤压现象。 （4）发现分支策略。 （5）评估了牛脱叶的程度和模式。未食用的健康叶子数量很小。他们将其放在斯多隆的尖头附近。 （6）在严格放牧的草皮中，白色三叶草克隆的脱叶应力均匀严重。（7）脱叶应力使它们造成了沉重的损害并促进了大小的变化，从而导致高死亡率风险。

项目成果

SAWADA,Hitoshi: "Variation in architectural and clonal growth traits within the seed population of white clover (Trifolium repens L.) in a Trifolium repens-Zoysia japonica sward." Grassland Science. 42 (3). 202-210 (1996)

SAWADA,Hitoshi：“白三叶草 - 结缕草草丛中白三叶草 (Trifolium repens L.) 种子群体结构和克隆生长性状的变化。”

ISHIKAWA,Mariko: "Benefits from physiollgical integration in white clover : the assessment in grazed sward." Grassland Science. 43 (Sup.). 52-53 (1997)

石川真理子：“白三叶草生理整合的益处：放牧草地的评估。”

荻ノ迫 善六: "日本国内のシロクローバ自生集団におけるシアン生成の緯度的及び高度的クライン" Grassland Science. 42(3). 242-246 (1996)

Zenroku Oginosako：“日本野生白三叶草种群氰产生的纬度和海拔梯度”《草原科学》42（3）242-246（1996）。

Sawada,H.: "Variation in architectural and clonal growth traits within the seed population of white clover (Trifolium repens L.) in a Trifolium repens-Zoysia japonica sward." Grassland Science. 42(3). 202-210 (1996)

Sawada, H.：“白三叶草 - 结缕草草丛中白三叶草 (Trifolium repens L.) 种子群体结构和克隆生长性状的变化。”

OGINOSAKO,Zenroku: "Latitudinal and altitudinal clines for cyanogenesis in naturalized populations of white clover (Trifolium repens L.) in Japan." Grassland Science. 42 (3). 242-246 (1996)

OGINOSAKO，Zenroku：“日本白三叶草（Trifolium repens L.）归化种群中氰化的纬度和海拔梯度。”