火炕经济育苗法的主要技术特征为 :(1)采用五股道火炕铺底 ;(2 )采取不全泥炕薄 ;(3 )实行顿火烧法 ;(4 )结合扎弓棚盖膜保湿增温 ;(5 )运用温床分期规范管理培育壮苗。通过几年的科技试验示范 ,总结出一套完整的甘薯“三段四期”火炕经济育苗操作规程。实践表明 :此法可早出苗、多出苗、出壮苗 ,省种、省工、省时 ,既节约能源 ,又杜绝了育苗“寒池”和“烧薯” ,减少苗床病害发生 ,实现了早栽增产 ,早上市增效 ,早腾茬提高土地利用率。此法集传统火炕、温床、阳畦育苗于一体 ,优势互补 ,扬长避短 ,值得推广应用 The main technical characteristics of nursery kang economic nursery method is: (1) Wudu Road kang bedding at the end; (2) to take the mud dirty kang; (3) the implementation of Dayton burning method; (4) (5) use of hotbed staging norm management to nurture strong seedlings. Through several years of scientific and technological experiments, summed up a complete set of sweet potato “three sections of four” nursery economic nursery operation rules. Practice shows that: This method can be early seedlings, more sprouts, strong seedlings, provincial species, provincial labor, save time, not only save energy, but also put an end to nursery “cold pool” and “potato” to reduce the occurrence of seedbed disease, to achieve Early planting and yield, morning market efficiency, early Tengcui improve land utilization. This method sets the traditional kang, hotbed, Yangba nursery in one, complement each other, avoid weaknesses, it is worth promoting the application