基于水热因子的玉米物候模拟

对锦州14 a玉米各生育期特征及其与气候因子的关系分析表明：同品种玉米的物候期相近，变化在2 d左右，而吐丝期到成熟期所需天数变化较大，为6 d或以上；玉米各生育期的影响因子不同，气温与湿度对玉米出苗期、三叶期和七叶期的影响显著，播种期到七叶期的积温占整个生育期积温的20%，并与同期的空气湿度累积量显著二次曲线相关（R 2=0.91）。积温与空气湿度累积可较好地模拟玉米播种期至七叶期和玉米的总生育期。

Phenological simulation of maize based on hydro-thermal factors

The relationships between different growing stages’ characteristics of maize and climatic factors of 14 years in Jinzhou were analyzed. The results show that the phenological phase of the same variety maize is similar and its range is about 2 days, except the silking stage to the mature stage with more than 6 days. The factors influencing various growing stages of maize are different. For example, the emergence stage, three leaf stage and seven leaf stage of maize are significantly influenced by air temperature and humidity. The accumulated temperature from the sowing date to seven leaf stage of maize accounts for 20% of the accumulated temperature in the total growing stage, and it has a significant conical relationship with the cumulant of air humidity (R2=0.91). The accumulated temperature and the cumulant of air humidity could be used to simulate the phenological phase of maize from the seeding stage to the seven leaf stage as well as the total growing stage of maize.