我国大部分地区的大多数甘薯品种不能自然开花。因此,甘薯杂交育种需将亲本诱导开花,才能进行有性杂交。甘薯嫁接使地下部不结薯,以促进生殖器官的发育而开花。采用塑料薄膜作甘薯嫁接覆盖材料,嫁接完后,立即就地用竹棍做成十字拱形支架,覆盖塑料薄膜,再用细土将下口封严。也可用塑料 Most sweet potato varieties in most parts of our country do not bloom naturally. Therefore, sweet potato hybridization breeding parents need to flowering in order to carry out sexual hybridization. Sweet potato grafting so that the underground part of the potato, in order to promote the development of reproductive organs and flowering. Using plastic film for sweet potato grafting covering material, immediately after grafting made of bamboo sticks made of cross-shaped bracket, covered with plastic film, and then fine soil will be under the seal. Also available plastic