The ratio of transpiration to evapotranspiration in a rainfed maize field on the Loess Plateau of China | Zendy

Shanshan Zhou | Zendy; Wenzhao Liu | Zendy; Wen Lin | Zendy

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The ratio of transpiration to evapotranspiration in a rainfed maize field on the Loess Plateau of China

Author(s) -

Shanshan Zhou,

Wenzhao Liu,

Wen Lin

Publication year - 2016

Publication title -

water science and technology water supply

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.318

H-Index - 39

eISSN - 1607-0798

pISSN - 1606-9749

DOI - 10.2166/ws.2016.108

Subject(s) - transpiration , evapotranspiration , loess plateau , leaf area index , agronomy , environmental science , crop coefficient , water use efficiency , water balance , precipitation , linear regression , crop , hydrology (agriculture) , mathematics , soil science , botany , geography , irrigation , biology , photosynthesis , ecology , statistics , geotechnical engineering , meteorology , engineering

Maize ( Zea mays L.) is a major crop on the Loess Plateau, and calculating the ratio of transpiration to evapotranspiration (T/ET) of maize is important for estimating field water balance. In this study, the sap flow method was adopted to measure transpiration (T) characteristics of maize. In order to calibrate the sap flow gauge, the sap flow rate was compared to the leaf T determined by the weighing method. The sap flow value was measured per hour for 3 days and the mean of the hourly values for each day was taken as the daily value to avoid the influence of hydraulic capacitance. There was a significant linear relationship between leaf T and sap flow rate. The slope and intercept of linear regression were 0.764 and 4.944, with an R 2 of 0.97 ( p

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