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山楂在我场的栽培已有五十多年的历史。据老农说:此品种在结果初个头大、产量较高,很受当地群众的欢迎。但是随着树令的增大和管理粗放,逐年出现了个头变小、花多果少,产量低、品质低劣等现象。据我们的观察,该山楂自花结实率低,生理落果严重,结果率仅达17％。对此,于一九七三年进行生长调节剂的应用试验,取得了很明显的效果。于此,一九七四年把‘920’应用于大面积生产上,结果也得到了同样的效果。在此基础上,于
Hawthorn in my field of cultivation has been more than 50 years of history. According to the farmer said: This breed in the first result of a large, high yield, very popular with the local people. However, with the increase of tree orders and the extensive management, the phenomenon of smaller heads, less fruit, lower output and inferior quality has emerged each year. According to our observation, the hawthorn self-fertility rate is low, physiological drop serious, the result rate of only 17%. In this regard, in 1973 the application of growth regulator test, and achieved significant results. Here, the application of ’920’ to large-scale production in 1974 resulted in the same result. On this basis,