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测定了几种木本豆科植物和乡土树种如木荷、桂西荷的叶片光合速率月变化，并在７和１２月测定了几种乡土树种、木本豆科植物和亚热带常绿阔叶树的气体交换量．结果表明，乡土树种在５月或９月光合速率达最大值，而在５—９月之间由于太阳辐射强烈和气温较高，光合速率降低；但木本豆科植物绢毛相思和大叶相思光台速率则较高，说明木本豆科植物在华南夏季能适应当地酷热条件，保持较高光合速率．在７月，阴香日同化量为８．５９９·ｍ－２，马占相思为５．６９９·ｍ－２，乡土树种木荷达７．４６９·ｍ－２．由此可见，乡土树种或常绿阔叶树种与木本豆科植物的阔叶混交林有助于提高太阳辐射能利用和增加光合同化产物，从而有利于亚热带常绿阔叶林植被的恢复．
The monthly photosynthetic rate of several woody legumes and native species such as Schima superba and Gui Xihe were measured. Several native species, woody legumes and subtropical evergreen broad-leaved trees were measured in July and December Gas exchange volume. The results showed that the photosynthesis rate of native species reached the maximum in May or September, while the solar radiation was high and the temperature was high between May and September while the photosynthetic rate decreased. However, Acacia Guangtai rate is higher, indicating that the woody legumes in summer in South China can adapt to the hot conditions, to maintain high photosynthetic rate. In July, the daily assimilation amount of C. sinensis was 8.599 · m-2, that of Acacia mangium was 5.699 · m-2, and that of native tree species was 7.469 · m-2. Thus, the native species or evergreen broad-leaved species and woody legumes broad-leaved mixed forest will help improve solar radiation utilization and increase photosynthetic products, which is conducive to the recovery of subtropical evergreen broad-leaved forest vegetation.