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目前一般柑桔普遍存在开花多,结果少和幼果期大量落果的现象。据观察研究,树势壮健的成年桔树花量有5—6万朶,但着果率常仅有2—3%。所以如何防止柑桔落果,特别是防止谢花后、幼杲至定果期间(5月下旬—7月上旬)的严重落果现象,是柑桔增产的重要问题之一。我站在加强柑桔栽培管理基础上,经数年研究保果措施中,应用2,4—D和萘乙酸来防止柑桔幼果期的落果,为既有效且简便、成本又低的方法之一。经研究,进一步找出不同品种应用2,4—D和萘乙酸防止落果的有效时期、次数和浓度,提高了柑桔产量和质量。此外,在定果期后,应用生长素促进果实充分膨大,也取得了增产的效果。
At present, citrus generally has more flowering, less fruit and a large number of fruit drop fruit phenomenon. According to observational studies, there are between 60,000 and 60000 adult trees of mature trees, but the fruit-bearing rate is usually only 2-3%. Therefore, how to prevent orange from falling out, especially to prevent the serious decleal phenomenon after giving flowers to young fruit to fruiting period (late May to early July), is one of the important problems of citrus yield increase. On the basis of strengthening citrus cultivation and management, I applied 2,4-D and naphthalene acetic acid to prevent falling fruit in the young fruit stage after several years of research and fruit preservation measures. This is an effective and simple method with low cost one. After the study, to further identify the different varieties of 2,4-D and naphthalene acetic acid to prevent decadent effective period, frequency and concentration, improve the citrus yield and quality. In addition, after the fruit set period, the application of auxin to promote the full expansion of the fruit, also achieved the effect of increasing production.