海南东寨港主要红树植物树高与胸径相关关系

Analysison Relationship Between Height and Diameter at Breast Height of Main Mangroves in Dongzhai Harbour,Hainan Island

采用相邻网格法在海南东寨港红树林保护区六个不同红树林群落中共布设六块有代表性的样地,测得454株海莲、129株无瓣海桑、112株海桑、198株秋茄树高与胸径,利用SAS9.0研究了树高(y)与胸径(x1)之间的相关关系。选出了适用于海莲树高预测的最佳回归方程为y=1.40334+0.49758x1+0.00399x12,适用于无瓣海桑、海桑树高预测的最佳回归方程分别为y/1=0.01732+1.10089/x1、y/1=0.01664+1.24603/x1,适用于秋茄树高预测的最佳回归方程为y=1.8165 x1 0.5230和lny=0.54906+0.54559lnx1。回归方程均达到极显著水平(P<0.01),其估计精度较高,均在93%以上,所建方程可用于计算各红树植物树高及其林分平均高。

Relationship Between Height （H）and Diameter at Breast Height （DBH）of Main Mangroves have been studied by establishing six representative plots in six different Mangroves community in Dongzhai harbour, Hainan island ,measuring tree height （H） and DBH of 454 Bruguiera sexangula trees,129 Sonneratia Apetala Buch-Ham trees, 112 Sonneratia caseolaris Engl trees and 198 Kandclia candel trees . Regression equations for different Mangroves are establisheded by studying the relations between tree height and DBH.The results indicate that Bruguiera sexangula tree heights are calculated by using height- diameter equation： y = 1.40334 ＋ 0.49758 xl＋0.00399x^21, Sonneratia Apetala Buch-Ham tree,Sonneratia 1 0 caseolaris Engl tree heights are calculated by using height-diameter equation：1/y=0.01732＋ 1.10089x1,1/y=0.01664＋1.24603 Xl,Kandelia candel tree heights are calculated by using height-diameter equation： y = 1.8165x10.5230 and lny = 0.54906 ＋0.545591nxl. The significance levels of equations are very high, The precision high ,all at 93% upwards,which indicate that there tree height can be estimated through DBH.