近几年山楂发展迅速。通过鉴定的各优良品种。不断由原产地引向外地,栽培范围逐步扩大。经过一个阶段的栽培实验表明,在树势、生物学特性及产量、果个等方面都与原产地相差不大。但在果肉颜色上有个别品种出现一定差异,其中主要出现由原来红肉变为绿肉或粉红肉这种劣变现象。我们认为是综合因素所引起的,其主要有以下三方面原因。 Hawthorn has developed rapidly in recent years. Through the identification of the fine varieties. Continue to lead the field from the origin, cultivation gradually expanded. After a period of cultivation experiments show that in the tree potential, biological characteristics and yield, fruit and other aspects of origin or less. However, there are some differences in the color of the individual species, of which the main change from the original red meat into green meat or pink meat such a deterioration phenomenon. We think that is caused by a combination of factors, mainly for the following three reasons.