在甘蔗群体中,有一种出土晚,长速慢,长势矮、细、弱的分蘖苗,叫做无效分蘖苗。这种苗由于被主茎和先出土的分蘖严重荫蔽,得不到正常生长发育所需要的水、肥、光照等生活要素,往往在尚未拔节之前就死掉。有的虽然勉强生存下来,长了肉拔了节,但也不能成为合规格的原料蔗。广大蔗农在甘蔗护理中,为了去弱留强,去密留疏,往 In the sugarcane population, there is a unearthed late, long slow, growing short, thin and weak tillering seedlings, called ineffective tillering seedlings. This seedling is severely shaded by the tiller of the main stem and the first unearthed, and can not obtain the living elements such as water, fertilizer and light required for normal growth and development, and often die before the knot is not yet knotted. Although some are living barely and have a long section of meat, they can not become qualified sugarcane. The majority of sugarcane farmers in the care of sugarcane, in order to weak strong, to close secret, to