防止作物倒伏是重要的增产措施之一。作物倒伏了,不仅造成不利的光照状况,还能增加土壤湿度,破坏作物的营养状况与生长发育,尤其是在抽穗结实阶段更为严重。作物倒伏一般可分为茎秆弯曲倒伏和根部倒伏两种。两者相比,根部倒伏危害更重。茎倒伏通常与茎秆纤细、机械组织不发达有关。那么根部倒伏的原因何在呢? 近年来,在研究麦类作物根倒伏中发现,不定根的根系走向、分布和根区大小,是能否倒伏的关键。目前,已基本区分出三个明显的类型(如图)。第一种不定根的分布呈现出以分蘖节为 Preventing crop lodging is one of the important stimulation measures. Crop lodging, not only cause adverse light conditions, but also increase the soil moisture, damage the nutritional status of crops and growth, especially in the ear stage is more serious. Crop lodging can generally be divided into bent stem lodging and root lodging two. Compared to the two, root lodging is more harmful. Stem lodging is usually associated with slender stems and underdeveloped mechanical tissues. So why root lodging? In recent years, wheat lodging in the study found lodging, adventitious roots to the root system, distribution and size of the root zone, is the key to whether the lodging. So far, three obvious types have been basically distinguished (pictured). The first distribution of adventitious roots showed tillering nodes as