湿地松（Pinus elliottii Engelm.）的生态生物学特征

湿地松具有抗旱耐瘠薄，早期生长快的特点，因而被广泛引种并常用植被恢复的先锋树种，通过广东省鹤山丘陵综合试验站的研究发现，湿地松纯林后期生长较慢，群落结构简单，生物多样性指数偏低，较易发生病虫害，湿地松落叶养分含量低，分解慢，不利于植被恢 过程中土壤肥力的提高，因此应根据不同目的营造不同类型的湿地松人工纯林或混交林，并对现有大面积的湿地松纯林进行林分改造。

The Ecological and Biological Charact ristics of Pinus elliottii

The ecological and biological characteristics of WTBX]Pinus elliottii is studied in Heshan City,Guangdong Province since 1984.P elliottii is capable of fighting drought and bearing barren land.It is widely uesed as a pioneer for vegetation restoration.On the other hand,P elliottii pure forest grows slowdowm sharply after 10 years increasing.Its structure is simple with lower Shannon Wonner index.It suffers from deseases and pests easily.Furthermore,the leaf litters of P elliottii are poor in nutrition and decomposed slowly,which is disadvantageous at amelioration of soil.So,it is very important and urgent to construct different pattern of P elliottii and improve the structure of P elliottii pure forest according to different proposition.