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1999年,北京市延庆县从辽宁省果树所引进大石早生李。该品种成熟早、品质好、价格高,但其坐果率很低。为此,在井庄果园进行试验。试验对人工授粉、修剪和常规管理下试验树的坐果率情况进行调查统计和分析。其目的就是通过试验探讨造成该品种坐果率低下的原因。试验结果发现:大石早生李自花授粉为零;经过修剪加人工授粉处理后完全花比例、自然授粉和异花授粉坐果率比常规管理条件下分别提高了15.50%、4.79%、7.91%;其自然授粉坐果率为7.45%,用美丽李、黑宝石为父本授粉坐果率分别是20.37%、17.02%。试验表明,造成大石早生李坐果率低的原因是除该品种自身的品种特性外,最重要的是授粉树的配置和光照问题。
In 1999, Yanqing County, Beijing, introduced boulders from the fruit trees of Liaoning Province. The varieties mature early, good quality, high prices, but the fruit setting rate is very low. To this end, in Zhuang orchard test. The results of artificial pollination, pruning and routine management of the test-tree fruit setting rate were investigated and analyzed. The purpose is to explore the reasons for the low fruit set rate of the breed. The results showed that the self-pollination of early peach brisket was zero; after pruning and artificial pollination, the percentage of natural pollination and cross pollination were increased by 15.50%, 4.79% and 7.91% respectively compared with the control; Fruit set rate of 7.45%, with beautiful plum, black gem pollination fertility rates were 20.37%, 17.02%. The experiment shows that the reason for the low rate of fruit setting in early-stage bryophytes is that the most important issue is the configuration and illumination of pollination trees except for the variety characteristics of the varieties.