Canopy-air Temperature Difference of Rice in Key Water Requirement Periods
Abstract：In order to investigate the applicability of moisture monitoring based on canopy temperature in rice, some experiments of different water treatments were carried in Liaoning Province. The rule of variation of canopy-air temperature difference of rice in key water requirement periods in Shenyang region and the relationships among canopy-temperature difference, soil water pressure and air vapor pressure difference（VPD） were analyzed. The results showed that currently being negative canopy-air temperature difference of rice changed with weather and water conditions. The conditions of soil water has no influence on canopy-air temperature difference when soil water suction was lower than 5 kPa, while the canopy-air temperature difference became greater and showed a trend of positive with the falling of soil water poten- tial. The linear relationship between canopy-air temperature difference and VPD was patency either in key water requirement periods or in a day when the air relative humidity was lower than 70 %.
Keywords：canopy-air temperature differenceirrigation~ soil water potential
Publication Date：2011-01-01
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)