甘薯良种优大速密繁种法在我国生产上由于一直没有一个健全的甘薯良种繁育体制,很多产区不自己留种,而是靠大调大运,有的甚至买苗生产,因此造成生产上用的种薯严重受病害浸染,品种混杂和退化。甘薯是无性繁殖作物,推广一个优良品种的繁殖速度也很慢,一般的办法是 Due to the fact that there is not a sound sweet potato breeding system in production in our country, many producing areas do not keep their own species, but rely on Grand Canal, and some even buy seedlings, thus resulting in production On the use of seed is severely affected by the disease, hybrids and degradation. Sweet potato is asexual reproduction of crops, to promote a good breed breeding speed is very slow, the general approach is