Abstract: The present paper compared winter wheat (Triticum sativum L.c.v. "Feng-mai-13") grown on the different altitude. The results showed, comparing wheat grown on higher altitude (2150 m) with that grown on lower altitude (840 m), that the former has a longer duration of leaves, a smaller area per leaf and total leaf area a plant; a lower intensity of photosynthesis during early stage, a higher intensity of photosynthesis during filling period, and little difference between both stages; a heavier thousand-kernel-weight, and a lesser number of grains per head than the latter. On the other hand, the difference of yield component has been disscused in terms of photosynthesis-yield. We proposed, on tbe basis of the dis- scusion, an assumption that how increase in number of grains per head which wheat is grown on higher altitude.

Key words: response, winter, climate, altitude

摘要： 对海拔2150米（高地）和480米（低地）种植的冬小麦“风麦13” 的叶片持续时间，单叶面积，每株总叶面积，光合作用强度和产量构成因素作了比较。结果表明高地小麦和低地的相比，叶片持续时间更长，单叶面积和每株总叶面积较小，光合作用强度前期较低，生育中期相差不大，灌浆后明显地较高。千粒重高地小麦较高，而每穗粒数则比低地的少。从光合作用产量的角度讨论了产量构成因素的差异，并提出增加高地小麦穗粒数的意见。

关键词: 冬小麦, 海拔气候, 反应, 叶片, 特征, 产量, 因素