大腹异木棉Ceiba insignis是近年来应用广泛的景观树种。通过对其实生苗株高、地径的年生长节律进行调查，并利用Logistic模型进行拟合，进而划分生长时期。调查发现，一年中苗木株高存在2次生长高峰，分别在6月和8月，地径于8月出现1次生长高峰。Logistic方程拟合度高，根据该曲线模型的特点，将苗木一年中生长阶段划分为生长初期（1—3月）、速生期（4—10月）、生长后期（11—12月）3个阶段，与其生物学特性相似且易混淆的同属植物美丽异木棉Ceiba speciosa生长过程也可划分为3个阶段，各阶段时间存在差异。并根据其生长规律研究成果及广州市气候环境提出相应栽培养护方案。

In recent years,Ceiba insignis is widely used in landscape.The annual growth rhythm of height and basal diameter of C.insignis seedlings is investigated,then the Logistic model is used for fitting,and the growth period is divided.The results show that the seedling response fits the Logistic quite well.During the year,there are two growth peaks of seedling height,respectively in June and August,and one growth peaks of basal diameter in August. According to the characteristics of the pattern diagram Logistic equation, the seedling stage is divided into 3 samples as blow: early growth period and rapid growth period and later growth period. The seedling stage of C. speciosa is also divided into 3 samples, which biological characteristics are similar to C. insignis. They are easy to be confused, but the time of each stage is different. Finally, rational nursery methods are applied according to the research results and the climate of Guangzhou.

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