烂秧是早稻生产的一个严重问题。烂秧的原因很多,症状也不少,大致可分为以下三个类型。1.播种前的烂种死胚这种现象主要发生在种子尚未发芽或破胸露白的初期,一般又分为三种情形。(1)盲谷即不发芽的谷粒。原因有三,一是有一些未成熟或未经后熟期的种子。这种情况通过预先晒种处理,加上高温催芽,可明显减少。二是浸种不透吸水不够,延缓种子发芽速度。补救措施是在催芽过程中多淋一些温水,促进呼吸。三是因为温 Rotten seedling is a serious problem of early rice production. Rotten seedling for many reasons, a lot of symptoms, can be broadly divided into the following three types. 1. Seeds before planting rotten embryo This phenomenon occurs mainly in the seed has not yet germinated or broken chest early, generally divided into three cases. (1) Blind grain that is not sprouting grain. There are three reasons, first, there are some immature or immature seeds. This situation by pre-drying treatment, coupled with high temperature sprouting, can be significantly reduced. Second, impermeable soaked imbibing water, slow seed germination speed. Remedy is in the process of sprouting more showering some warm water, promote breathing. Third, because of temperature