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水稻的叶片是按照一定的规律,一片片长出的。主茎上第一至第三片完全叶在幼苗期长出;最上三片叶在穗分化期长出;其余的叶片在分蘖期长出。主茎上的叶片越多,分蘖期越长,全生育期也就长。正如人的一生,可用年龄来区别大小一样,水稻的一生,也可用主茎叶片数,即叶龄表示它的大小。用主茎叶龄表示水稻生育期的好处 1.每一品种的主茎叶片数都比较稳定水稻主茎的叶片数目因品种而不同,早熟品种叶片数少,晚熟品种叶片数多。通常水稻的叶片数目在10—19片之间,一般早稻约有10—13片叶,中稻有14—15片叶,晚稻可达19片叶。这是由品种遗传性决定的。一个品种在不同地区或在同一地区的不同播栽季节里,主
Rice leaves are in accordance with certain laws, a piece of film grows. The first to the third complete leaves on the main stem grew in the seedling stage; the top three leaves grew during the spike differentiation stage; and the remaining leaves grew at the tillering stage. The more leaves on the main stem, the longer the tillering period, the whole growth period is long. Just as human life can be distinguished by age, the life of a rice can also be expressed by the number of main stem leaves, that is, the leaf age indicates its size. The main stems and leaves with the age of rice that the benefits of the growth period 1. The number of main stems of each variety are relatively stable The number of main stems of rice leaves vary with different varieties of early maturing varieties of leaves less late varieties more leaves. Usually the number of leaves in rice is between 10-19 tablets, usually about 10-13 leaves of early rice, mid-season rice has 14-15 leaves, late rice up to 19 leaves. This is determined by the heritability of the breed. A breed in different regions or in the same area in different seasons of planting, the Lord