甘薯栽培的一系列农业技术措施中,育苗占着一个非常重要的地位。育苗方法在华北地区以室外火炕育苗及温床育苗为主。群众对火炕育苗有着比较悠久的历史,掌握和累积了一套比较完整丰富的技术。目前,在甘诸育苗比较有基础的地区,火炕育苗尚是最主要的方法,因此,如何在原有的基础上,将火炕育苗更提高一步,是有很重大意义的。河北省甘薯主产区定县,群众的火炕育苗已有50多年的悠久历史。1955年春,定县七 In a series of agricultural technology measures of sweet potato cultivation, nursery stock occupies a very important position. Nursery methods in North China to outdoor nursery nursery and nursery hotbed based. The masses have a long history of nursery keda, mastered and accumulated a relatively complete set of rich technology. At present, nursery seedlings in the more willing to have a more basic area, nursery nursery kang is still the most important method, therefore, how the nursery nursery on the basis of the original, one step further, is of great significance. Hebei Province, the main producing sweet potato County, the crowd of kang nursery has a long history of more than 50 years. The spring of 1955, seven counties