青钱柳为典型的雌雄异型异熟树种,包括雌花先熟个体(雌先型,PG)和雄花先熟个体(雄先型,PA)两种交配型。同一交配型内雌雄花期错开而交配型间雌雄花同步的开花生物学特性可能对青钱柳种子产量和质量有重要影响。为了解青钱柳群体的交配系统,对江苏溧阳陶峰和安徽红琊山林场的7年生青钱柳人工林群体进行了连续2 a花期物候学观测,包括林分中交配型的比例、不同交配型的雌雄开花顺序、开花持续时间及花期相遇特点。结果表明:受环境条件的影响,青钱柳花期为4月下旬至5月下旬,有一定波动;雌、雄花期持续时间分别为9~19 d(最长21 d)和2~9 d。在人工林幼龄群体中,开花植株有2类共5种表现型,其中两性植株包括雌先型(PG)、雄先型(PA)和同步型(SC),单性植株包括雌株(F)和雄株(M);观察发现幼林群体中雌株居多,两性植株比例较小。2015年溧阳陶峰青钱柳人工林中开花率达到73.2%,两性植株占28.8%,PA和PG比例1∶1.2;而红琊山林场的开花率仅为38.6%,其中16.7%为两性植株,PG比例较高。连续2 a的定株观察还表明:开花表现型的变化主要为单性植株转变为两性植株;PA和PG表达稳定,极少发生逆转;两性植株中,有52.2%的植株上雌、雄花期完全错开,而47.8%的植株上雌、雄花花期有部分(少量全部)重叠。相关分析表明,开花状况与母树胸高断面积显著相关,显著性大小顺序为雌先型﹥雄先型﹥雄株﹥雌株﹥未开花植株。多重比较表明:两性植株的平均胸高断面积与单性植株、未开花植株差异显著;开花植株中雌先型、雄先型和雄株平均胸高断面积差异不显著,但三者与雌株存在显著差异。由此推测青钱柳开花与否和开花表现型明显受植株营养积累的影响。 Cyclocarya paliurus is a typical dioecious different-tree species, which includes two male mating type (female type, PG) and male flower premature individuals (male type, PA). The flowering biological characteristics of male and female flowers in the same mating type with staggered male and female mating may have a significant impact on the yield and quality of Cyclocarya paliurus seeds. In order to understand the mating system of Cyclocarya chinensis populations, two-year flowering phenology observation was conducted on the seven-year-old Cyclocarya sibirica plantations in Tao Feng, Liyang, Jiangsu Province and Hongjianshan Forest Farm in Anhui Province, including the proportion of mating type in the stands Mating type male and female flowering order, flowering duration and flowering met characteristics. The results showed that the flowering stage of Cymbidium volumia was fluctuating from late April to late May, and the duration of female and male flowering was 9-19 days (up to 21 days) and 2-9 days, respectively. Among young plantations, flowering plants had 5 phenotypes in 2 categories, including amphibian (PG), male type (PA) and synchronous type (SC), and unisexual plants including female (F) And male plants (M). It was observed that most of the female plantlets in the young plantation population had a small proportion of both sexes. In 2015, the flowering rate of Qiu-Feng Qiu Liu in Liuyang plantation reached 73.2%, the percentage of bisexual plants was 28.8% and the ratio of PA and PG was 1: 1.2. However, the flowering rate was only 38.6% in Hongjianshan Forest Farm, of which 16.7% , PG a higher proportion. The observation of continuous 2-year-old plants also showed that the main changes of flowering phenotypes were the transformation from unisexual plants to amphipathic plants; the expression of PA and PG was stable and seldom reversed; in 52.2% of the plants, the female and male flowering plants Completely staggered, while 47.8% of the plants on the male and female male flowering part (a small amount of all) overlap. Correlation analysis showed that the flowering status was significantly correlated with the area of ​​the chest of thymus, the order of significance was female first type> male first type> male plant> female plant> un-flowering plant. Multiple comparisons showed that the average area of ​​chest and height of amphipathic plants was significantly different from that of uniparental and un-flowering plants. The average area of ​​chest height and the height of female type, male type and male type in flowering plants were not significant, but there were significant differences between them difference. It was speculated that Cymbidium flowering or not and flowering phenotype significantly affected by plant nutrient accumulation.