抚育措施对红树植物幼树生长的影响

Effect of Tending on the Mangrove Sapling

采用随机区组试验设计， 研究在次生红树灌木林 （白骨壤＋ 桐花树群落 ｃｏｍ ｍ ｕｎｉｔｙ Ａｖｉｃｅｎｎｉａ ｍ ａｒｉｎａ ＋ Ａｅｇｉｃｅｒａｓｃｏｒｎｉｃｕｌａｔｕｍ ） 改造中施肥及除灌两种抚育措施及其组合对红树植物木榄（ Ｂｒｕｇｕｉｅｒａ ｇｙｍ ｎｏｒｒｈｉｚａ ）、红海榄 （ Ｒｈｉｚｏｐｈｏｒａ ｓｔｙｌｏｓａ ） 幼树生长的影响。结果表明， 除灌可使木榄高生长提高１６５％ ， 基径生长提高３８９％ ， 幼树叶面积提高４３３％ ；施肥可使红海榄高生长提高９７％ ，基径生长提高１４３％ ， 叶面积提高３７４％ ；除灌和施肥均不能增加红树植物叶片的叶绿素含量。

The effects of shrub control, fertilizing and their combination on Bruguiera gymnorrhiza and Rhizophora stylosa were studied by randomized block in a Avicennia marina+ Aegiceras corniculatum secondary community. For B. gymnorrhiza, the stand height, basal diameter and leaf area in shrub control were 16 5%,38 9%and 43 3% greater respectively than that in shrub condition. Fertilizing for R. stylosa could increase stand height by 9 7%, basal diameter by 14 3% and leaf areas by 37 4% respectively compared with the non fertilizing.The two tending methods have no improvement in chlorophyll content of mangrove leaf.