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中文摘要：
物候特性研究能够深入了解植物的生长特性,为植物栽培养护、分类、杂交育种与园林应用提供参考 依据.通过定期定点观测记录的方法,研究了南方地区常用的三种羊蹄甲属观花乔木宫粉紫荆、羊蹄甲与红花 羊蹄甲的物候特性,结果表明：（ 1） 三种羊蹄甲属植物的新梢生长均集中于夏季,但持续时间以及生长高峰 期稍有差异,红花羊蹄甲与羊蹄甲生长趋势较为-致,而宫粉紫荆受高温影响较为明显,高温期间生长减缓. （2） 三种羊蹄甲的花期不同,宫粉紫荆的花期为1 2 -翌年4 月,羊蹄甲花期为10-12 月,红花羊蹄甲花期 最长,为11 - 翌年5月,三种羊蹄甲属植物的花色、花序、单花花期等稍有不同.（ 3 ） 综合三种羊蹄甲属植 物的新梢生长与开花物候特性,表明红花羊蹄甲与羊蹄甲的亲缘关系更为接近.
英文摘要：
The research on phenological characteristics gives a deeper understanding of the growth characteristics of plants. It also provides the reference to plant cultivation maintenance, classification, crossbreeding and landscape application. We studied phenological characteristics of three species of Bauhinia plants by fixed-point observation records on a regular basis. Three species were subject to B. variegata 9 B. purpurea, B. x blakeana respectively, three beautiful flower trees widely used in the south area. The results showed that： （ 1 ） New shoots of each species growed in the summer, but the time of duration and growth peak was different slightly. The growth trend of B. X blakeana and B. purpurea were more consistent, but the growth of B. variegata slowed down due to the high temperature. （ 2 ） Florescence of three species were different, florescence of B. variegata was December to April following year, florescence of B. purpurea was October to December, florescence of B. X blakeana was the longest, November to May following year. The color, inflorescence, single florescence of 3 species were different slightly. （3 ） The study of shoots growth and flowering phenology characteristics indicated that genetic relationships of B. x blakeana was close to B. purpurea.
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