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我国南方春季寒流频繁,低温阴雨,是形成早稻烂秧的气候原因。整个育秧过程都有可能发生烂秧。催芽的关键是掌握好一定的温度,并做到“秧田等种子,种子等天气”;播种到扎根前(有的是从落谷到一片真叶展开现青以前)一段时间,种芽耐寒力较强,为了促进扎根,需要充足的氧气,长期淹水缺氧最为不利,是发生烂秧的主要原因,但温度也不能过低;一叶到三叶,种子本身养分逐渐消耗,抗寒能力减弱,同时秧苗通气组织尚未健全,对氧气仍有一定要求,低温和缺氧都容易发生烂秧;三叶以后,通气组织已健全,氧气供应充足,关键为防御低温,并由防止烂秧转为培育壮秧。
South China spring frequent cold, low temperature rainy weather is the reason for the formation of rotten rice seedlings. The entire process of seedlings may have rotten seedlings. Germination of the key is to master a certain temperature, and to achieve “seedling and other seeds, seeds and other weather”; sowing to take root before (some from the valley to a true leaf before the emergence of youth) for some time, strong cold hardiness , In order to promote rooted, need plenty of oxygen, the most unfavorable long-term flooding hypoxia, is the main reason for rotten seedlings, but the temperature can not be too low; leaf to clover, the seeds of their nutrients gradually consumed, the ability to reduce the cold, At the same time the seedling ventilation organization is not perfect, the oxygen still has some requirements, low temperature and hypoxia are prone to rotten seedlings; clover later, ventilation organization has been healthy, adequate supply of oxygen, the key is to prevent low temperature, and by preventing rotten seedling cultivation Strong seedlings.