沙质海岸木麻黄林带更新不同树种混效效果及种间关系研究

沙岸木麻黄林带更新采用木麻黄与湿地松不同比例混交配置，木麻黄等树种单行和多行混交造林。结果表明：木麻黄与湿地松带状混交效果较好，但需适时适量疏伐；木麻黄与刚果12^#桉、厚英相思分别单行混交造林种间关系协调，湿地松与刚果12^#桉、厚英相思行状混交易受压；不同树种采取多行配置树种间关系良好，木麻黄与刚果12^#桉处于同一林层，厚英相思分布于木麻黄之下，而湿地松与厚英相思多行混交免遭挤压，生长良好。

EFFECT OF MULTI-SPECIES MIXING AND THEIR INTERSPECIFIC RELATION IN REGENERATION OF CASUARINA EQUISETIFRLIA SHELTERBELT IN SANDY COAST

Results of regeneration of Casuarina equisetifolia shelterbelts by mixing of multi species showed that effect of ribbon mixing of Casuarina equisetifolia with slash pine is better, but it needs thinning in right time and proper quantity.Relationship of one row mixing of Casuarina equisetifolia with Eucalyptus 12 ABL,and with Acacia crassicarpa is in harmony,but slash pine mixed with Eucalyptus 12ABL,and with Acacia crassiearpa is under stress.Interspecific relationship of multi row allocation of different species is better:Casuarina equisetifolia and Eucalyptus 12ABL is in the same layer;Acacia crassicarpa distributes under Casuarina equisetifolia;and sladh pine and Acacia crassicarpa mixed in multi row way avoid squeezing and grow well.