【摘要】 本文比较了云南巧家县海拔分别为840m和2150m的两地种植的冬小麦“凤麦13”的单株总干物重的累积和干物质在各器官的分配,表明高海拔地区的低温使该处生长的冬小麦前期干物质累积速度比低地的慢,总量因之也低,而灌浆开始后积累较多的干物质。前期低地叶子的干物质占总干物重的比例比高地的大。灌浆至收获期间,低地小麦的叶和颖壳减重比高地的显著,收获时茎,鞘的干重也略低。最后就高海拔地区的较低的地温对小麦“源—库”关系的影响,讨论了高海拔地区小麦高产的可能性。更多还原

【Abstract】 In this paper, accumulation ot total dry matter of a single plant and partitioning of dry matter in various organs of winter wheat (Triticum sativum L. c. v. "Fengmai 13") grown at an altitude of 840 m (lowland) are compared with those of the same wheat grown at 2150 m (highland). The results showed that the low temperature at high-altitude localities made slower the accumulation rate of the dry matter at early stages of winter wheat grown at those localities than at lowland, and its total accumulation level is less too. After the beginning of filling, however, more dry matter was accumulated. At the early stages of growth, the leaf dry matter at lowland made up a larger proportion of the total dry matter than at highland. From filling to harvest period, the weight of leaf and glume of wheat decreased more markedly at lowland than at highland. During harvesting, the dry weight of stem and sheath of wheat at lowland is a little less than at highland. Finally, in respect to the effect, caused by lower temperature at high-altitude localities, on "sourcesink" relationships of wheat, the possibility of high yield of wheat at high-altitude localities is discussed.更多还原