海南省湿加松无性系苗期生长动态分析

Growth Dynamic Analysis of Clones of Slash Pine×Honduras Caribbean Pine at the Nursery Stage in Hainan Province

对湿加松10个无性系苗期苗高和地径的生长动态进行调查,并用Logistic方程对苗高和地径的生长动态进行拟合,分析雨热同期湿加松的生长动态规律及生长参数。结果表明:湿加松无性系苗期年生长高度符合"S"型生长曲线。以湿加松地径和苗高划分其苗木的生长阶段,则地径和苗高的速生期持续时间分别为94~125 d和60~77 d。

Ten clones of hybrids between slash pine （Pinus elliottii Engelm. var elliottii L. ＆ D.） and Honduras caribbean pine （Pinus caribaea Mor. var hondurensis B. ＆ G.） at the nursery stage were selected to observe their growth dynamics in plant height and ground diameter, and the growth dynamics were was fitted by using Logistic equation to analyze the growth dynamic changes and growth parameters of the clones growing in the same period of hot and rain. The results showed that the annual growth height of the clonal plants at the nursery stage was consistent with the ＂S＂ growth curve. When the ground diameter and plant height were used to determine the growth stage of the plants, the fast growing stages for the ground diameter and plant height lasted for 94 - 125 days and 60 - 77 days, respectively.