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甘薯在我国大部分地区的自然条件下多不开花。因此,进行杂交育种首先要诱导甘薯开花。诱导开花的方法很多,以重复法效果较好。具体做法是:以甘薯为接穗,蕹菜、牵牛花或月光花为砧木进行嫁接,当嫁接植株长到2尺左右时,每日给以8—9小时的光照进行短日照处理。除南方省区外,可用塑料薄膜覆盖的火炕、温床或冷床等于2—3月份播种嫁接材料,选用口径1尺左右的瓦钵,把钵安放在苗床中,钵土用3份细土和1份腐熟的杂厩肥配成(以体积算)。先排亲本,等薯种
Most of China’s sweet potato in most parts of the natural conditions are not flowering. Therefore, the first breeding to induce sweet potato flowering. There are many ways to induce flowering, and the effect of repeated method is better. Specific practices are: sweet potato as scion, Brasenia stem, morning glory or moonflower as the rootstock grafting, when the grafted plants grow to about 2 feet, the daily 8-9 hours of light to short-day treatment. In addition to the southern provinces, the plastic film can be used to cover the kang, hotbed or cold bed is equivalent to 2-3 months sowing grafting materials, selection of about 1 foot diameter Vat bowl, the bowl placed in the seedbed, bowl soil with 3 fine soil and A maturity of the compost fertilizer dubbed (in volume). First row of the parent, potato and other species