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叶是小麦的重要营养器官。了解叶的形态、结构和功能,对掌握叶的生长规律,提高光能利用率,夺取小麦高产有重要意义。一、小麦叶的形态和功能小麦叶由叶片、叶鞘、叶耳和叶舌组成。叶片长形、扁平伸展,有利于接受阳光,吸收二氧化碳,进行光合作用。由于品种不同,叶片的大小和数目也不同。同一品种,主茎上的叶片数也随播期而变化。叶片的长度和宽度,随叶位的增高而依次增大;叶鞘紧包在茎上,上部开裂,近基部联合,可加
Leaves are important vegetative organs of wheat. Knowing the shape, structure and function of leaves is important for grasping the law of leaf growth, increasing the utilization rate of light energy and seizing the high yield of wheat. First, the shape and function of wheat leaves Wheat leaves from the leaves, leaf sheath, leaf lugs and leaves composition. Long leaves, flat stretch, is conducive to receiving sunlight, absorb carbon dioxide, photosynthesis. Due to the different varieties, the size and number of leaves are also different. The same species, the number of leaves on the main stem also changes with the sowing time. Leaf length and width, with the leaf position increases in turn increases; leaf sheath tightly wrapped in the stem, the upper part of the crack, near the base of the joint can be added