Comparative studies on crop root response to rheological traits in soil.

作物根系对土壤流变性状响应的比较研究。

• 批准号: 09660011
• 负责人: INOUE Naoto
• 金额: $ 1.28万
• 依托单位: Shinshu University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1997
• 资助国家: 日本
• 起止时间: 1997 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09660011/
• 关键词: root; rice; soil; direct seeding; establishment; rheology; viscocity; circumnutation; 回旋運動; 生長; 苗立ち; 回旋性; ソバ; フラクタル

Field experiments were carried Out to clarify the differences and key factors in the rate of seedling establishment among rice varieties sown on the soil surface in flooded paddy fields. There is a significant difference among varieties. The main causes for lower seedling establishment rate existed in floating and seedling mortality in the younger stage. These two causes were independent of each other. No clear correlation were found between the percentage of floating seedling and the plant length, the seminal root length or the apparent weight of seedling in water, which has been reported to be the cause of floating seedlings resulting in poor seedling establishment. Root tip rotation was analyzed for indoor-grown seedlings using spectrum analysis: the maximum entropy method (MEM) was used. MEM spectrum analysis clarified that maximum power density detected in the frequency range above 0.1 cycles mmィイD1-1ィエD1 was highly and positively correlated to seedling establishment percentage in the field experiment. From the result, root tip rotation with a larger spiral angle was suggested to play an important role in the establishment of rice seedlings on flooded and very soft soil. The percentage of the seedlings with a spiral root growth with a larger angle was examined on a medium with low viscosity (10-20cp) by using 76 varieties obtained from IRRI Core Collection. The percentage is a convenient and useful method for screening rice varieties with high seedling establishment rate. The higher the viscosity of seedbed is, the higher the frequency of spiral per unit root length in the case of varieties which have a higher ability for establishment.

通过田间试验，明确了淹水稻田土壤表播水稻品种间成苗率的差异及关键因素。造成成苗率较低的主要原因是浮水。浮苗率与幼苗期幼苗死亡率之间没有明显的相关性，据报道。成为漂浮的原因使用频谱分析对室内生长的幼苗进行根尖旋转分析：使用最大熵法 (MEM) 阐明在高于 0.1 个周期 mm D1- 的频率范围内检测到最大功率密度。田间试验结果显示，1与成苗率呈高度正相关，表明较大螺旋角的根尖旋转对于水淹和成苗的水稻成苗起着重要作用。使用从 IRRI 核心收集中获得的 76 个品种，在低粘度（10-20cp）的介质上检查具有较大角度的螺旋根生长的幼苗的百分比。筛选成苗率高的水稻品种，苗床粘度越高，成苗能力越高的品种，单位根长度的螺旋频率越高。

项目成果

中道秀人、井上直人、萩原素之: "ネパール産ダッタンソバにおける根系の形態的変異"日本作物学会紀事. 68(別1). 182-183 (1999)

Hideto Nakamichi、Naoto Inoue、Motoyuki Hagiwara：“尼泊尔荞麦根系的形态变异”，日本作物科学学会杂志 68（第 1 部分）（1999 年）。

Nakamichi, H., N. Inoue and M. Hagiwara: "Morphological varietion of root system in Nepalese tartary buckwheat."Jpn. J. Crop. Sci.. 68(Extra 1). 182-183 (1999)

Nakamichi, H.、N. Inoue 和 M. Hagiwara：“尼泊尔苦荞根系的形态变异。”Jpn。

N. Inoue: "Ecological significance of spiralgrowth in rice seminal root."Nogyo oyobi engei. 72(11). 77-85 (1997)

N. Inoue：“水稻种子根螺旋生长的生态意义。”Nogyo oyobi engei。

Inoue et l.: "Ecological signification of root tip rotation for seedling establishment of Orvza sativa L." Ecol. Res.14. 55-62 (1999)

Inoue 等人：“根尖旋转对于 Orvza sativa L 幼苗建立的生态意义”。

井上: "イネ種子根のラセン運動の生態学的意味-根物の根の諸問題(52)-" 農業および園芸. 72 (11). 78-85 (1997)

井上：“水稻种子根的螺旋运动的生态意义 - 水稻植物根的问题（52）”农业和园艺72（11）（1997）。