Seasonal Variation in Evapotranspiration from Mat Rush Grown in Paddy Field
Seasonal Variation in Evapotranspiration from Mat Rush Grown in Paddy Field
复制标题
稻田灯心草蒸散量的季节变化
DOI：
10.2480/agrmet.60.1
复制
发表时间：
2004
影响因子：
1.3
通讯作者：
T. Miyamoto
中科院分区：
文献类型：
--
作者：
A. Maruyama;K. Ohba;Y. Kurose;T. Miyamoto
灯心草（Juncus effusus L.）在八代平原（32° 33.9′N，130° 38.4′E，海拔1 m）的一个商业稻田中，利用基于热量平衡的波文比率法观测到了2000年的平均气温。在1999/2000年（2000年季节）和2000/2001年（2001年季节）从移栽（12月）到收获（7月）进行了观察。蒸散量（E）随气温和太阳辐射的增加而增加。2000年和2001年两个季节整个生长期的平均和总E值分别为2.02、2.16 mm日-1和491、499 mm。将E的日平均值与参考作物蒸散量（E0）和潜在蒸发量（EP）进行了比较。在芦竹生长过程中，E/E0呈增加趋势，在0.46 ~ 1.00之间。在席草生长过程中，E/EP也呈上升趋势，从0.42上升到0.84。席草的E/E0和E/EP可表示为植物面积指数（派）的函数。使用该函数估计E的均方根误差（RMSE）在1天尺度上为0.5 mm day-1，在5天尺度上为0.2 mm day-1，在10天尺度上为0.1 mm day-1。E/E0和E/EP的变化也受到土壤水分、风速和饱和亏的影响，这是席草蒸腾作用变化的结果。然而，仅根据上述环境因素的差异，很难解释2000年和2001年季节之间E/E0和E/EP的差异。结果表明，2000年和2001年两季芦竹茎色的差异反映了芦竹生理活性的差异，从而影响了E/E0和E/EP。
Evapotranspiration from mat rush (Juncus effusus L.) was observed using the Bowen ratio method based on heat balance in a commercial paddy field located on the Yatsushiro Plain (32° 33.9′N, 130° 38.4′E, 1 m above sea level). Observations were conducted from transplanting (December) to harvest (July) in 1999/2000 (2000 season) and 2000/2001 (2001 season). Seasonal variation of evapotranspiration (E) showed an increasing trend with air temperature and solar radiation. Average and total values of E during the entire growth period in the 2000 and 2001 seasons were 2.02, 2.16 mm day-1 and 491, 499 mm, respectively. Daily mean values of E were compared with the reference crop evapotranspiration (E0) and potential evaporation (EP). Seasonal variations of E/E0 showed an increasing trend from 0.46 to 1.00 during the growth of mat rush. Similarly, E/EP showed an increasing trend from 0.42 to 0.84 during the growth of mat rush. E/E0 and E/EP of mat rush could be expressed as a function of plant area index (PAI). Root mean square error (RMSE) of estimating E using the function was 0.5 mm day-1 on a 1-day scale, 0.2 mm day-1 on a 5-day scale and 0.1 mm day-1 on a 10-day scale. Variations in E/E0 and E/EP were conjectured to be also influenced by soil moisture, wind speed and saturation deficit as the result of change in transpiration from mat rush. However, it was difficult to explain the difference in E/E0 and E/EP that was found between 2000 and 2001 seasons, based only on the difference in environmental factors described above. It was suggested that the difference in the physiological activity of the mat rush, which was indicated by differences in stem color between 2000 and 2001 seasons, affected the E/E0 and E/EP.
日本观测降水强度与地表温度的关系
DOI：
--
发表时间：
2010
期刊：
影响因子：
--
作者：
内海信幸;瀬戸心太;鼎信次郎;沖大幹
通讯作者：
沖大幹