滨海沙地相思类树种造林试验与效果分析

PLANTING EXPERIMENT AND BENEFIT ANALYSIS OF XIANGSI TREE SPECIES ON THE COAST SANDY LAND

在不同生境条件下开展相思类树种造林试验研究,结果表明:厚荚相思对海岸前沿不良生境适应性强,可作为更新改造的主要树种之一;厚荚相思、纹荚相思、直干大叶相思及马占相思在低郁闭度林带下套种保存率高,生长量以厚荚相思表现最佳;基干林带间隔带状皆伐方式更新厚荚相思与湿地松、厚荚相思与木麻黄无性系多行配置种间关系稳定,单行混交易引起种间矛盾和空间的激烈竞争;后沿沙地厚荚相思与马占相思生长快,干形通直,蓄积量大,出材率高,是理想的更新树种。

Result of the study on planting Xiangsi tree species in different habitat conditions showed that adaptability of A.crassicarpa to bad habitat was better.It can be one of major regeneration species,Survival percent of plantation of A.crassicarpa,A,aulacocarpa,A.brassii and A.mangium was higher in interplanting under the lower closing of shelterbelt,and growth of A.crassicarpa was better.The interspecies relationship was stable when regenerating by clearcutting in strips of the trunk Shelterbelt and by multi-line allocating of A.Casuarina clones.But single line mixing was liable to cause interspecies contradiction and spacing competition On the back edge sandyland,growth of A crassicarpa and A.mangium was faster,more straight in stem form,and the volume was great.