冠层温度-气温差与作物水分亏缺关系的研究

The relationship between discrepancy of canopy and air temperature and crop water deficiency

摘要: 试验研究了冬小麦在不同土壤水分条件下拔节～抽穗期冠层温度-气温差变化规律及其随作物生长发育期的变化状况。结果表明，作物在充分供水条件下冠层温度-气温差变化较平缓；缺水时变化较大。冠层温度-气温差随作物生长发育期的变化趋势为低水分处理高于高水分处理。冠层温度-气温差可较合理反映土壤水分变化状况和作物水分亏缺程度。

Abstract: The changes of discrepancy between canopy and air temperature of wheat under different soil moistures from jointing to heading stage were analyzed.The results indicated that the change of discrepancy between canopy and air temperature was smooth under full water supply,and its change was large under water deficiency.The change tendency of discrepancy between canopy and air temperature with growth stage was higher under water deficiency than full water supply.The discrepancy between canopy and air temperature can be an indicator used for evaluating the change of soil moisture and the degree of crop water deficiency