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以龙眼早熟品种桂冠早(暂定名)、中熟品种石硖、晚熟品种桂明一号为研究对象,观测并分析3个不同熟期龙眼品种开花和果实发育及落果规律,并测定了果实品质。结果表明,桂冠早雌雄花比为0.587,是石硖和桂明一号的近2倍。桂冠早的雌雄花相遇期长达15d,且开放高峰期重合;石硖和桂明一号雌雄花相遇期仅8~9d,且石硖雌花开放高峰期早于雄花,桂明一号雌花开放高峰期晚于雄花。桂冠早果实发育期仅80d左右,但在整个发育期的绝对生长率和相对生长率较高。3个品种的落果均贯穿果实发育期,且均集中在前期;采前4周桂冠早、石硖和桂明一号的累积落果率分别达7.57%、9.75%和6.06%。桂冠早为高糖中果形品种,石硖为高糖小果形品种,桂明一号为低糖大果形品种。
The early maturing variety of longan, Gui Guan Zao (tentative name), middle maturing variety Shijie and late maturing variety Gui Ming 1 were studied. The flowering and fruit development and fruit drop of three longan varieties were observed and analyzed. The fruit quality. The results showed that the ratio of early male to female was 0.587, which was nearly twice that of Shijie and Guiming. Laurel male early male and female flowers meet up to 15d, and the peak opening coincidence; Shijie and Gui Ming No. 1 male and female flowers meet only 8 ~ 9d, and the stone flower female flower opening peak earlier than male flowers, Gui Ming 1 female flowers open Peak later than male flowers. Laurel early fruit development period is only about 80d, but the absolute growth rate and relative growth rate throughout the developmental period is higher. The fruit drop of the three cultivars all occurred in the fruit development stage, and all concentrated in the early stage. The cumulative fruit drop rates of Gui Guan early, Shijie and Gui Ming No.1 were 7.57%, 9.75% and 6.06% respectively four weeks before the harvest. Laurel as early as the high-fructose fruit variety, Shijie high-sugar small fruit-shaped varieties, Gui Ming No. 1 for the low-sugar large fruit-shaped varieties.