胡颓子苗木的年生长规律初探

目的]研究胡颓子1年生播种苗苗高、地径的年生长规律。方法]通过定期观测胡颓子苗高、地径生长,用数学模型Logistic方程拟合苗高、地径的生长过程。结果]胡颓子苗木的生长时期可划分为4个阶段：出苗期（4月23日以前）;生长初期（4月24日～5月23日）;生长盛期（5月23日～9月23日）;生长后期（9月23日以后）。苗高、地径生长规律符合＂S＂型生长曲线,实测值与模型计算值基本吻合,可用Logistic方程预测生长期内苗高、地径生长量。结论]研究结果可为胡颓子的栽培、引种驯化及管理提供理论依据。

Study on Annul Growth Dynamics of Elaeagnus pungens Thunb seedlings

Objective] The research aimed to study the annul growth rules of seedlings height and ground diameter of 1-year-old seedlings of Elaeagnus pungens Thunb.Method] The regular observation with seedling height and ground diameter of Elaeagnus pungens Thunb has been carried out.The growth process of seedling height and ground diameter was simulated by the Logistic equation of mathematic model.Result] The growing period of Elaeagnus pungens Thunb Seedlings has been divided into four stages:seedling stage(before April 23),preliminary stage of seedling growth(from April 24 to May 23),prosperous stage of seedling growth(from May 23 to September 23)and later stage of seedling growth(after September 24).The growth rules of seedling height and ground diameter were in accordance with the growth curve of "S" type.The actual value was mainly coincident with the model predicted value.The growth of seedling height and ground diameter can be predicted by the Logistic equation.Conclusion] The finding provides the theoretical basis for the cultivation,introduction domestication and management of Elaeagnus pungens Thunb.