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在山东省胶东地区,茌梨开花期常受霜冻为害。据记载,1954年～1975年间莱阳县茌梨花期受冻即有10次,其冻害程度虽然不同,但均对生产造成一定的损失。1986年春,茌梨花期又遭冻害,花朵冻害率达40％以上(有的园片达60～70％),这无疑会对生产造成很大的影响。防止冻害,除根据天气预报采取紧急预防措施外,在花朵受冻之后,如何提高座果率,以便减轻经济损失,也是一个值得研究的问题。本试验在使用植物生长调节剂提高座果率和促进单性结实方面取得一定效果,现将试验结果报告于次。
Jiaodong in Shandong Province, Pei pear flowering often frost damage. According to records, from 1954 to 1975 Laiyang County Pear blossomed 10 times, although the degree of frost damage is different, but all of the production of a certain loss. In the spring of 1986, pear blossoms were frostbite again and the frost-blight rate of flowers reached more than 40% (some of them reached 60-70%), which undoubtedly had a great impact on the production. To prevent frost damage, apart from taking urgent preventive measures based on the weather forecast, it is worth studying how to increase the rate of fruit set after the flowers have been frozen in order to reduce economic losses. This experiment in the use of plant growth regulators to improve the rate of fruit set and promote the parthenocid fruit achieved some results, the test results are reported in the second.