3种人工阔叶林的叶片养分和光合特性研究

Leaf nutrient and photosynthetic characteristics in three artificial broad leaved stands in Foshan city, Guangdong province

为人工阔叶林的经营模式提供合理的依据,对广东省佛山市高明区云勇林场的3种人工阔叶林(贼佬坑石笔木林,白石岗阔叶混交林,仙人春阔叶混交林)的树种叶片养分和光合特性进行了研究,结果表明:各树种的叶片氮、磷、钙、镁含量水平均不高;混交林中各树种的叶片养分状况优于纯林,且仙人春阔叶混交林的混交模式优于白石岗阔叶混交林;仙人春阔叶混交林中格木、米老排及白石岗阔叶混交林中黄兰和火力楠的叶片养分状况优于其他树种;混交林中各树种的整体光合指标高于纯林,且白石岗阔叶混交林各树种的光合能力高于仙人春阔叶混交林;贼佬坑石笔木林的各项光合指标均最低,而白石岗阔叶混交林的华南毛柃的各项光合指标均较高。

Leaf nutrient and photosynthetic characteristics were studied in three artificial broad leaved stands（Tutcheria championii pure stand of Zeilaokeng, mixed broad-leaved stand of Baishigang, mixed broad-leaved stand of Xianrenchun） in Yunyong forest farm of Foshan city, Guangdong province in order to provide basis for forest management. The results showed that the levels of N, P, Ca and Mg contents in leaves of each species were low. The leaf nutrient status in the mixed broad-leaved stands was better than this in the pure broad-leaved stand. The effect of mixed pattern in mixed broad-leaved stand of Xianrenchun was better than this in mixed broad-leaved stand of Baishigang. The leaf nutrient status of Erythrophleum fordii, Mytilaria laosensis, Michelia champaca and Michelia macclurei was better than other tree species. The photosynthetic indexes in the mixed broad-leaved stands were higher than the pure broad-leaved stand. The photosynthetic indexes in mixed broad-leaved stand of Baishigang were the highest among the three stands, whereas the T. championii stand was the lowest. The photosynthetic indexes of T. championii were relatively lower than those of other tree species, but those of Eurya ciliata in mixed broad-leaved stand of Baishigang were the highest.