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很多书本上都提到红叶李的繁殖系数比较低,常用繁殖方式就是以毛桃、李、梅或杏作为砧木进行嫁接,这远远不能满足今后市场的需求量。笔者于2002～2003年对红叶李进行大田扦插试验,成活率在80%以上,大大提高了繁殖率。笔者所用的是粗放式管理的露地长竿扦插技术。长竿扦插原因红叶李插条不容易形成愈伤组织,生根也较慢,常常是插穗还未生根便因养分和水分消耗完而枯死,这就是通常采用硬枝扦插成活率低的关键原因。这里要介绍的长竿扦插技术,就很好地解决了这个同题:即前期通过长竿插穗内储存的养分供叶芽萌发和生长,然后再通过长大的叶片进行光合作用制造养分,来供根系萌发,这样就大大提高了扦插成活率;而且,长竿扦插成活后便有45～50厘米的基干,以后无须再定干,缩短了苗木出圃年限。扦插时间长竿硬枝扦插应在秋季落叶后至春季树液流动前的休眠期进行。而且根据各地的气候差异,冬季温暖的江南可在初冬进行;华北地区因形成冻土层,最好在春季土壤解冻后扦插。
Many books have mentioned the low coefficient of reproductive Hongye Li, commonly used means of reproduction is to peach, plum, plum or apricot as a rootstock grafting, which is far from meeting the needs of the market in the future. In 2002-2003, the author conducted the field cutting experiment on Hongye Li with the survival rate above 80%, which greatly enhanced the reproduction rate. I used the extensive management of open-cut pole cutting technology. The reasons for long-stem cutting Hongye plum is not easy to form callus, rooting is also slow, often cuttings have not yet rooted due to nutrients and water exhausted and dead, and this is usually the key reason for the low survival rate of hardwood cutting. Here to introduce the long-stem cutting technology, it is a good solution to this problem: the early through the cuttings stored nutrients for leaf buds germination and growth, and then through the growth of leaves for photosynthesis to create nutrients for Root germination, thus greatly improving the survival rate of cuttings; Moreover, after the survival of long-stem cutting there will be 45 to 50 cm of the trunk, no longer need to be set to dry, shorten the nursery out of nursery years. Cutting long-term hardwood cuttings should be in the fall leaves before the flow of spring sap flow before the dormancy period. And according to the climate differences, the warm winter in southern China can be carried out in early winter; North China due to the formation of frozen soil layer, the best in spring after soil thawing cuttings.