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2003年在始兴县进行10种粤北乡土阔叶树种选择研究。结果表明:造林3年后幼树的成活率均达到95%;平均树高生长最快的是红荷木Schima wallichi、i火力楠M ichelia macclurei和金叶含笑M icheliafoveolata,平均树高为4.5~5.5 m;樟树C innamomum camphora和深山含笑M ichelia maudiae生长较慢,树高生长不足3 m。冠幅生长最快的是红荷木、枫香Diquidambar formosana、金叶含笑和火力楠,平均为2.5~2.8 m;江南桤木Alnus trabeculosa、木荷Schima superba、深山含笑和樟树的冠幅生长较慢,平均冠幅仅1.6~1.8 m。生长最佳的前5名树种依次是红荷木>火力楠>金叶含笑>枫香>山杜英。土壤根际土速效N、P、K养分含量较高的前5名树种依次是樟树>红荷木>石栎>火力楠>深山含笑,木荷和山杜英根际土速效养分较低。研究结果揭示了红荷木、火力楠和金叶含笑在粤北地区生长较快,保持水肥能力较强,适于在粤北生态公益林建设中应用和推广。
In 2003 in Shixing County, 10 species of Guangdong native broad-leaved tree species selection. The results showed that the survival rate of saplings reached 95% after 3 years of afforestation. The average height of tree height was the fastest growing in Schima wallichi, M. ichelia macclurei and M. ichelia foveolata, with the average height of 4.5 ~ 5.5 m; Camphor C innamomum camphora and Mishelia maudiae larvae grew slowly, and tree height was less than 3 m. Crown of the fastest growth is red lotus, Liquidambar Diquidambar formosana, gold leaf smile and fire Nan, with an average of 2.5 ~ 2.8 m; southern Alnus trabeculosa Alder, Schima superba, Schisandra and camphor tree crown growth Slow, the average crown of only 1.6 ~ 1.8 m. The top five best growing species are red holothuria> fire south> gold leaf smile> Liquidambar> Shan Du Ying. The top 5 species with high N, P and K nutrient contents in soil rhizosphere soil were followed by camphor tree> Hongjiaomu> Lithocarpus glauca> Firewood> The results revealed that the growth of Honghe wood, firewood and gold leaf in the northern part of Guangdong Province was relatively rapid and the water and fertilizer capacity was relatively high. It was suitable for application and popularization in the construction of ecological public welfare forests in north Guangdong.