东莞生态公益林改造树种的早期生长季节节律及其与气候条件的关系

对东莞板岭生态公益林林分改造所用的55个树种的基径和树高生长量按季节进行调查,为期2年,结果显示：春分～秋分是这些树种的生长峰期.对大多数树种而言,温度对生长量的影响最大,其次是降水、日照时数,春分～夏至期间的水热条件最适宜树木的生长.进一步分析发现猫尾木、吊瓜木、楠木、云南石梓、米老排、香椿、阴香对水热条件较敏感,红锥、密花树、蓝花楹、竹节树、樟树、火力楠、西南荷、格木对水热条件的适应性较强;猫尾木、吊瓜木、云南石梓、石梓、乌墨、木波罗、扁桃性喜高温多雨,生长最高峰出现在夏至～秋分;肖蒲桃、格木、木波罗、乌墨、华杜英受日照时数的影响较大,密花树、猴欢喜、长叶竹柏、蓝花楹、竹节树、扁桃受日照时数的影响较小.这对植物引种和树种选择有一定的指导意义.

The Early Growth Seasonal Rhythm and the Relationship with Climate of Different Tree Species for Stand Conversion in Dongguan Ecological Forest

The basic diameter of stem and height of 55 tree species for stand conversion of ecological forest in Dongguan city were investigated in each season for two years.The results showed that: Trees grown faster between spring equinox and autumn equinox.For most tree species,growth rate was influenced by temperature mostly,precipitation secondly,and sunshine hours the least. The most suitable conditions of temperature and precipitation were between spring equinox and middle summer.Further analysis found that: Dolichandrone cauda-felina,Kigelia africana,Phoebe bournei,Gmelina arborea,Mytilaria laosensis,Toona sinensis,Cinnamomum burmannii were sensitive to conditions of temperature and precipitation;Castanopsis hystrix,Carallia brachiata,Jacaranda mimosifolia,Rapanea neriifolia,Cinnamomum camphora,Michelia macclurei,Schima wallichii,Erythrophloeum fordii had well compatibilities.Dolichandrone cauda-felina,Kigelia africana,Gmelina arborea,Gmelina chinensis,Syzygium cumini,Artocarpus heterophyllus,Mangifera persiciformis adapted to conditions with higher temperature and more precipitation,who had the highest growth rate between middle summer and autumn equinox.Acmena acuminatissima,Erythrophloeum fordii,Artocarpus heterophyllus,Syzygium cumini,Elaeocarpus chinensis were more influenced by sunshine hours,and Rapanea neriifolia,Sloanea sinensis,Nageia fleuryi,Jacaranda mimosifolia,Carallia btachiata,Mangifera persiciformis were less influenced.The results above had conductive significance for plant introduction and selection of tree species.