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识别叶令,以掌握水稻生长发育进程,在水稻生产和杂交水稻制种中,极为重要。过去都是采取定株点漆的方法计算叶令。去年,我对水稻叶片形态进行了细致的观察,发现水稻各个叶片的叶脉数目、中脉的位置都不同,而且有一定的规律。根据叶片上的叶脉数目,就能知道它是第几片叶。我把这种方法叫做“叶脉法”。“叶脉法”识别叶令,方法简便,极易挚握。我们知道:水稻的叶互生于茎的两侧,种子发芽最先出现芽鞘(又称鞘叶),从鞘叶中再长出一片不完全叶,以后就顺序长出第一、二、三……片完全叶。种子稃尖所朝的方向是第一片完全叶。由于水稻的叶序是互生的,因而与水稻第一片完全叶同一侧的叶片都是奇数叶,即第一、三、五、七…叶。水稻第二叶同一侧的叶片都是偶数叶,
Identifying yehling to master the process of rice growth and development is extremely important in rice production and hybrid rice seed production. In the past are taken Zhu Ding point method of calculating Ye Ling. Last year, I conducted a detailed observation on the morphology of rice leaves and found that the number of leaf veins and the location of midrib in each leaf of rice are different and have certain laws. According to the number of leaves on the leaf, you can know it is the first few leaves. I call this method “vein method.” “Vein method” to identify Ye Ling, the method is simple, easy to master. We know that the leaves of rice alternate on both sides of the stem, the seed germination first appears bud sheath (also known as the sheath and leaf), from the sheath leaves and then grow an incomplete leaf, after the order of growing first, two, three ... slice completely leaves. The direction of the tip of the seed is the first complete leaf. Because the leaves of rice are alternate, the leaves on the same side of the first full leaf of rice are all odd leaves, ie the first, third, fifth and seventh leaves. The leaves on the same side of the second leaf of rice are even leaves,