Establishment of new Criteria for Irrigation Scheduling

制定灌溉计划的新标准

• 批准号: 63860029
• 负责人: YANO Tomohisa
• 金额: $ 4.67万
• 依托单位: Tottori University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Developmental Scientific Research (B).
• 财政年份: 1988
• 资助国家: 日本
• 起止时间: 1988 至 1990
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-63860029/
• 关键词: Evapotranspiration; Leaf temperature; Leaf water potential; Water stress; Stomata resistance; Leaf-air temperature difference; Osmotic potential; Matric potential; 水分のストレス; 葉の水ポテンシャル; 葉気温差の日較差; 蒸散日較差; 蒸散抵抗; SPACモデル

Recentry, it has been proposed that irrigation scheduling should be done based on the moisture condition in the plant instead of the soil moisture condition. A purpose of this study is to establish new criteria for irrigation scheduling. The results obtained ate shown as follows :(1) Index of the leaf temperatureThe leaf-air temperature difference is recommended as a simple index for irrigation scheduling as the results obtained from the experiments in the different places that leaf temperature decreases with increased evaporativity and with high soil moisture.(2) Index of the evapotranspirationA new method to estimate evapotranspiration as functions of solar radiation, mean air temperature and mean wind velocity using the data of leaf temperature is proposed. It was recognized that the relation between the Penman's potential evapotranspiration and the estimated values by the proposed method was linearly correlated with high correlation coefficient of 0.98.(3) Index of the moisture in the soil and plantAs the results of simulation and experiment, the typical variations of solar radiation, leaf temperature, leaf water potential, stomata resistance, matric potential, osmotic potential and transpiration rate with time were obtained with plant water stress under the different irrigation conditions.

近年来，有人提出，灌溉调度应根据植物的水分状况，而不是土壤水分状况。本研究的目的是建立新的灌溉调度标准。（1）叶温指标叶气温差作为灌溉制度的一个简单指标，是在不同土壤水分含量高、蒸发率大的地区进行的试验结果。(2)本文提出了一种利用叶温资料估算蒸散量与太阳辐射、平均气温和平均风速关系的新方法。结果表明，彭曼潜在蒸散量与该方法估算值之间呈线性相关，相关系数达0.98。(3)土壤和植物水分指标模拟和实验结果表明，在不同灌溉条件下，植物水分胁迫下，太阳辐射、叶温、叶水势、气孔阻力、基质势、渗透势和蒸腾速率随时间的典型变化规律。

项目成果

Yamamura Yoshihiro: "Occurrence of zero flux plane in the unsaturated zones" Proc. of Western Pacific Geophysics meeting, Trans. American Geophysical Union. Vol. 71. 870 (1990)

Yamamura Yoshihiro：“非饱和区域中零通量平面的出现”Proc。

中野芳輔: 九大農学芸誌. 43. 61-67 (1988)

中野义介：九州大学农业学报。43. 61-67 (1988)

矢野 友久: "潅漑時期の判定について" 農業土木学会中国四国支部講演会講演要旨集,. 45. 30-32 (1990)

矢野智久：《关于确定灌溉期》日本农业土木学会中国四国分会摘要，45. 30-32 (1990)

Takagi Kenzou: "Evapotranspiration distribution map considering spatial variability" Proc. of JSIDRE meeting, (Kyushu Branch). Vol. 71. 99-100 (1990)

Takagi Kenzou：“考虑空间变异性的蒸散分布图”Proc。

Nakano,Y.: "Three dimensional analysis of soil moisture movement in row crop for irrigation" Trans.14th International Congress of Soil Science.6. 102-107 (1990)

Nakano，Y.：“灌溉用中耕作物土壤水分运动的三维分析”Trans.14th 国际土壤科学大会.6。