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土温对产量潜力的限制玉米高产的限制因素,世界不同地区各异。温带地区,主要是生理原因,即开花前后光照和温度不足,造成光合产物减少。热带地区原因较多,如使生长期缩短的水分短缺,热带低地夜间高温造成的高呼吸损失,多雨林带连续多云形成的光照不足等。玉米栽培的另一个问题就是在温带地区土壤温度不足或在某些热带地区又过高。玉米生长发育的最适土壤温度范围是25～34℃,附表概述种种土壤温度效应。土壤温度对玉米萌发和出苗特别重要,但
Limitations of soil temperature on yield potential Limiting factors for high yield of maize vary from region to region. Temperate regions, mainly physiological reasons, that is, before and after flowering and lack of light and temperature, resulting in reduced photosynthetic products. There are many reasons in the tropics, such as the shortage of shortened growing season, the high respiratory loss due to the high temperature in the tropical lowlands, and the insufficient light caused by the continuous cloudy formation in rainforests. Another problem with maize cultivation is the lack of soil temperature in temperate regions or excessively high levels in some tropical regions. The optimum soil temperature range for maize growth and development is 25 ~ 34 ℃. The schedule summarizes various soil temperature effects. Soil temperature is particularly important for germination and emergence of maize, however