Quantifying the germination behavior of seeds against variable environmental conditions can use as a useful implement for seed ecological studies. Seed vigor depends on the temperature and moisture conditions during seed development and storage. To quantify the effects of temperature and water potential on germination response of fenugreek seeds, thermal time, hydrotime, and hydrothermal time models were employed. The treatments included 9 temperatures (5, 10, 15, 20, 25, 30, 35, 40 and 45 °C), and five water potentials (0, −0.2, −0.4, −0.6, and −0.8 MPa) on deteriorated (35 h) and non-deteriorated seeds. The results indicated that the segmented model was the best model to describe the germination response of fenugreek seed under different temperatures and water potentials. The cardinal temperatures predicted for germination were 0.48, 21.6, and 46 °C for non-deteriorated seeds, and 0.85, 20.6, and 46.3 °C for deteriorated seeds at 0 MPa. Thermal time constants were 49125 and 56657.9 °C h for non-deteriorated and deteriorated seeds at -0.8 MPa and were 899.6 and 1072 °C h for non-deteriorated and deteriorated seeds at 0 MPa. Hydrotime constants were 50.64 and 72.37 MPa h at 5 °C for non-deteriorated and deteriorated seeds and were 1.97 and 3.07 MPa h at 35 °C. Hydrothermal time constants of non-deteriorated and deteriorated seeds were 264.1 and 263.1 MPa °C h at the supra-optimal temperatures.

量化种子在不同环境条件下的发芽行为可以用作种子生态研究的有用工具。种子活力取决于种子发育和储存期间的温度和水分条件。为了量化温度和水势对胡芦巴种子发芽反应的影响，采用了热时间，水时和水热时间模型。处理包括9个温度（5、10、15、20、25、30、35、40和45℃），以及五个劣化水势（0，-0.2，-0.4，-0.6和-0.8 MPa）。 （35小时）和未退化的种子。结果表明，分割模型是描述胡芦巴种子在不同温度和水势下的萌发响应的最佳模型。预计萌发的主要温度为0.48、21.6，在0 MPa下，非退化种子的温度为46°C，而退化种子的温度为0.85、20.6和46.3°C。在-0.8 MPa下，未劣化和退化的种子的热时间常数分别为49125和56657.9°C h，在0 MPa时，非劣化和退化的种子的热时间常数为899.6和1072°h。对于未退化和退化的种子，在5°C时的水时常数为50.64和72.37 MPa h，在35°C时的水时常数为1.97和3.07 MPa h。在最适温度下，未退化和退化的种子的水热时间常数分别为264.1和263.1 MPa°C h。对于未退化和退化的种子，在5°C时的水时常数为50.64和72.37 MPa h，在35°C时的水时常数为1.97和3.07 MPa h。在最适温度下，未退化和退化的种子的水热时间常数分别为264.1和263.1 MPa°C h。对于未退化和退化的种子，在5°C时的水时常数为50.64和72.37 MPa h，在35°C时的水时常数为1.97和3.07 MPa h。在最适温度下，未退化和退化的种子的水热时间常数分别为264.1和263.1 MPa°C h。