【摘要】 采用每日热效应和基本灌浆期因子计算小麦生长后期生理发育时间 ,并预测抽穗、开花和成熟等生育期。每日热效应是指受每日温度和品种温度敏感性影响的生育促进因子 ,其中温度效应用正弦函数来表达 ,而曲线的陡度用温度敏感性来调节。基本灌浆期因子是指小麦在最适条件下由灌浆至成熟所需的相对时间长短。通过调节品种的温度敏感性和基本灌浆期因子来统一不同小麦品种到达抽穗、开花和成熟的生理发育时间。结果表明 ,生理发育时间恒定的原理可以较好地预测小麦抽穗后的主要生育期更多还原

【Abstract】 This paper described calculation of physiological development time after heading by using the daily thermal effectiveness and basic filling duration factor, and prediction of heading, anthesis and maturity stages. Daily thermal effectiveness was expressed as a sine curve integrating daily temperature effect and temperature sensitivity (genotic parameter) in relation to wheat development. Filling duration factor (another genotic parameter) was defined as the relative length from filling to maturity under the optinal codition. Test of the model indicated that heading, anthesis and maturity stages could be predicted accurately by the concept of physiological development time, that was kept constant for different varieties at a given stage.更多还原